./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 45294379b83c6b60e0b0199955cdf7244f057430 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:55:05,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:55:05,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:55:05,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:55:05,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:55:05,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:55:05,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:55:05,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:55:05,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:55:05,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:55:05,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:55:05,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:55:05,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:55:05,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:55:05,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:55:05,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:55:05,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:55:05,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:55:05,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:55:05,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:55:05,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:55:05,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:55:05,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:55:05,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:55:05,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:55:05,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:55:05,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:55:05,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:55:05,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:55:05,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:55:05,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:55:05,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:55:05,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:55:05,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:55:05,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:55:05,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:55:05,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:55:05,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:55:05,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:55:05,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:55:05,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:55:05,062 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:55:05,076 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:55:05,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:55:05,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:55:05,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:55:05,078 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:55:05,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:55:05,078 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:55:05,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:55:05,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:55:05,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:55:05,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:55:05,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:55:05,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:55:05,080 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:55:05,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:55:05,080 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:55:05,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:55:05,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:55:05,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:55:05,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:55:05,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:55:05,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:55:05,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:55:05,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:55:05,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:55:05,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:55:05,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:55:05,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:55:05,083 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_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-11-15 22:55:05,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:55:05,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:55:05,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:55:05,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:55:05,126 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:55:05,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-15 22:55:05,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/data/543141bff/9f6bb4b34e884d119d7ba99bf67a5b0c/FLAGe53d2ce20 [2019-11-15 22:55:05,603 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:55:05,604 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-15 22:55:05,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/data/543141bff/9f6bb4b34e884d119d7ba99bf67a5b0c/FLAGe53d2ce20 [2019-11-15 22:55:05,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/data/543141bff/9f6bb4b34e884d119d7ba99bf67a5b0c [2019-11-15 22:55:05,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:55:05,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:55:05,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:55:05,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:55:05,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:55:05,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bfc2dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05, skipping insertion in model container [2019-11-15 22:55:05,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,640 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:55:05,655 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:55:05,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:55:05,877 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:55:05,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:55:05,901 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:55:05,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05 WrapperNode [2019-11-15 22:55:05,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:55:05,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:55:05,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:55:05,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:55:05,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:55:05,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:55:05,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:55:05,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:55:05,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... [2019-11-15 22:55:05,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:55:05,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:55:05,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:55:05,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:55:05,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:06,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 22:55:06,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:55:06,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:55:06,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 22:55:06,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:55:06,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:55:06,310 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:55:06,310 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-15 22:55:06,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:55:06 BoogieIcfgContainer [2019-11-15 22:55:06,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:55:06,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:55:06,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:55:06,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:55:06,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:55:05" (1/3) ... [2019-11-15 22:55:06,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7ab5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:55:06, skipping insertion in model container [2019-11-15 22:55:06,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:55:05" (2/3) ... [2019-11-15 22:55:06,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7ab5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:55:06, skipping insertion in model container [2019-11-15 22:55:06,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:55:06" (3/3) ... [2019-11-15 22:55:06,319 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-11-15 22:55:06,327 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:55:06,334 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:55:06,349 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:55:06,373 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:55:06,374 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:55:06,374 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:55:06,374 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:55:06,374 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:55:06,374 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:55:06,375 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:55:06,375 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:55:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-15 22:55:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 22:55:06,415 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:06,416 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:06,418 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:06,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-11-15 22:55:06,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:06,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9867395] [2019-11-15 22:55:06,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:06,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:06,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:06,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9867395] [2019-11-15 22:55:06,534 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:55:06,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 22:55:06,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139815077] [2019-11-15 22:55:06,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:55:06,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:55:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:55:06,551 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-15 22:55:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:06,563 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-15 22:55:06,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:55:06,564 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 22:55:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:06,573 INFO L225 Difference]: With dead ends: 30 [2019-11-15 22:55:06,573 INFO L226 Difference]: Without dead ends: 13 [2019-11-15 22:55:06,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:55:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-15 22:55:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-15 22:55:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-15 22:55:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-15 22:55:06,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-15 22:55:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:06,606 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-15 22:55:06,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:55:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-15 22:55:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:55:06,607 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:06,607 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:06,607 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-11-15 22:55:06,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:06,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282512652] [2019-11-15 22:55:06,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:06,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:06,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:06,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282512652] [2019-11-15 22:55:06,653 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:55:06,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:55:06,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182217288] [2019-11-15 22:55:06,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:55:06,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:55:06,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:55:06,655 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-15 22:55:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:06,673 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-15 22:55:06,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:55:06,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-15 22:55:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:06,674 INFO L225 Difference]: With dead ends: 24 [2019-11-15 22:55:06,674 INFO L226 Difference]: Without dead ends: 15 [2019-11-15 22:55:06,675 INFO L600 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 [2019-11-15 22:55:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-15 22:55:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-15 22:55:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-15 22:55:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-15 22:55:06,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-15 22:55:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:06,679 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-15 22:55:06,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:55:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-15 22:55:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-15 22:55:06,680 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:06,680 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:06,680 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-11-15 22:55:06,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:06,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005237431] [2019-11-15 22:55:06,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:06,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:06,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:06,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005237431] [2019-11-15 22:55:06,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863848002] [2019-11-15 22:55:06,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:06,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:55:06,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:06,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:06,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-15 22:55:06,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665267343] [2019-11-15 22:55:06,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:55:06,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:55:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:55:06,881 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-15 22:55:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:06,903 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-15 22:55:06,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:55:06,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-15 22:55:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:06,905 INFO L225 Difference]: With dead ends: 26 [2019-11-15 22:55:06,905 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 22:55:06,905 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:55:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 22:55:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-15 22:55:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-15 22:55:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-15 22:55:06,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-15 22:55:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:06,909 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-15 22:55:06,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:55:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-15 22:55:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 22:55:06,910 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:06,910 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:07,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:07,111 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:07,111 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-11-15 22:55:07,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:07,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118301731] [2019-11-15 22:55:07,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:07,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:07,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:07,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118301731] [2019-11-15 22:55:07,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059770896] [2019-11-15 22:55:07,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:07,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:55:07,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:07,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:55:07,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:07,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:07,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-15 22:55:07,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512195357] [2019-11-15 22:55:07,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:55:07,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:55:07,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:55:07,242 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-15 22:55:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:07,282 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-15 22:55:07,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:55:07,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-15 22:55:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:07,286 INFO L225 Difference]: With dead ends: 28 [2019-11-15 22:55:07,286 INFO L226 Difference]: Without dead ends: 19 [2019-11-15 22:55:07,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:55:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-15 22:55:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-15 22:55:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-15 22:55:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-15 22:55:07,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-15 22:55:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:07,289 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-15 22:55:07,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:55:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-15 22:55:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:55:07,290 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:07,290 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:07,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:07,493 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-11-15 22:55:07,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:07,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323649759] [2019-11-15 22:55:07,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:07,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:07,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:07,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323649759] [2019-11-15 22:55:07,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914404106] [2019-11-15 22:55:07,594 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:07,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 22:55:07,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:07,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:55:07,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:07,677 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:07,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-15 22:55:07,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157562154] [2019-11-15 22:55:07,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:55:07,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:07,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:55:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:55:07,679 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-15 22:55:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:07,711 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-15 22:55:07,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:55:07,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-15 22:55:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:07,713 INFO L225 Difference]: With dead ends: 30 [2019-11-15 22:55:07,713 INFO L226 Difference]: Without dead ends: 21 [2019-11-15 22:55:07,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:55:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-15 22:55:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-15 22:55:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 22:55:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-15 22:55:07,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-15 22:55:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:07,717 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-15 22:55:07,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:55:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-15 22:55:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:55:07,718 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:07,718 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:07,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:07,922 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:07,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-11-15 22:55:07,922 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:07,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784444044] [2019-11-15 22:55:07,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:07,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:07,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:08,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784444044] [2019-11-15 22:55:08,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122607003] [2019-11-15 22:55:08,022 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:08,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:55:08,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:08,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 22:55:08,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:08,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:08,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-15 22:55:08,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077874897] [2019-11-15 22:55:08,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:55:08,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:55:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:55:08,081 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-15 22:55:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:08,124 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-15 22:55:08,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:55:08,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-15 22:55:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:08,127 INFO L225 Difference]: With dead ends: 32 [2019-11-15 22:55:08,127 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 22:55:08,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:55:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 22:55:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-15 22:55:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 22:55:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-15 22:55:08,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-15 22:55:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:08,132 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-15 22:55:08,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:55:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-15 22:55:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:55:08,133 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:08,133 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:08,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:08,334 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-11-15 22:55:08,334 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:08,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058967436] [2019-11-15 22:55:08,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:08,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:08,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:08,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058967436] [2019-11-15 22:55:08,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045550633] [2019-11-15 22:55:08,425 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:08,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 22:55:08,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:08,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 22:55:08,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:08,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:08,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-15 22:55:08,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359968197] [2019-11-15 22:55:08,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 22:55:08,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:08,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 22:55:08,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:55:08,508 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-15 22:55:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:08,545 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-15 22:55:08,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 22:55:08,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-15 22:55:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:08,546 INFO L225 Difference]: With dead ends: 34 [2019-11-15 22:55:08,546 INFO L226 Difference]: Without dead ends: 25 [2019-11-15 22:55:08,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:55:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-15 22:55:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-15 22:55:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 22:55:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-15 22:55:08,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-15 22:55:08,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:08,551 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-15 22:55:08,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 22:55:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-15 22:55:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 22:55:08,553 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:08,553 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:08,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:08,766 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:08,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-11-15 22:55:08,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:08,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480720973] [2019-11-15 22:55:08,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:08,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:08,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:08,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480720973] [2019-11-15 22:55:08,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953095716] [2019-11-15 22:55:08,860 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:08,954 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 22:55:08,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:08,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 22:55:08,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:08,970 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:08,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-15 22:55:08,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815708771] [2019-11-15 22:55:08,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:55:08,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:55:08,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:55:08,972 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-15 22:55:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:09,020 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-15 22:55:09,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 22:55:09,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 22:55:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:09,022 INFO L225 Difference]: With dead ends: 36 [2019-11-15 22:55:09,023 INFO L226 Difference]: Without dead ends: 27 [2019-11-15 22:55:09,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:55:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-15 22:55:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-15 22:55:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 22:55:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-15 22:55:09,027 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-15 22:55:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:09,027 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-15 22:55:09,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:55:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-15 22:55:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 22:55:09,028 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:09,030 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:09,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:09,233 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-11-15 22:55:09,234 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:09,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924422110] [2019-11-15 22:55:09,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:09,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:09,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:09,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924422110] [2019-11-15 22:55:09,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256205445] [2019-11-15 22:55:09,374 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:09,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 22:55:09,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:09,448 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:09,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-15 22:55:09,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529054028] [2019-11-15 22:55:09,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 22:55:09,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 22:55:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-15 22:55:09,450 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-15 22:55:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:09,494 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-15 22:55:09,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 22:55:09,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-15 22:55:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:09,495 INFO L225 Difference]: With dead ends: 38 [2019-11-15 22:55:09,495 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 22:55:09,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-15 22:55:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 22:55:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-15 22:55:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 22:55:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-15 22:55:09,500 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-15 22:55:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:09,500 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-15 22:55:09,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 22:55:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-15 22:55:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 22:55:09,501 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:09,501 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:09,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:09,705 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-11-15 22:55:09,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:09,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221884535] [2019-11-15 22:55:09,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:09,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:09,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:09,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221884535] [2019-11-15 22:55:09,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848126250] [2019-11-15 22:55:09,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:09,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:55:09,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:09,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 22:55:09,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:09,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:09,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-15 22:55:09,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958212113] [2019-11-15 22:55:09,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 22:55:09,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 22:55:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:55:09,915 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-15 22:55:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:09,971 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-15 22:55:09,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 22:55:09,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-15 22:55:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:09,972 INFO L225 Difference]: With dead ends: 40 [2019-11-15 22:55:09,973 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 22:55:09,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:55:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 22:55:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-15 22:55:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 22:55:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-15 22:55:09,977 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-15 22:55:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:09,978 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-15 22:55:09,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 22:55:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-15 22:55:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-15 22:55:09,979 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:09,979 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:10,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:10,183 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-11-15 22:55:10,183 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:10,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661645902] [2019-11-15 22:55:10,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:10,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:10,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:10,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661645902] [2019-11-15 22:55:10,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101220947] [2019-11-15 22:55:10,327 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:10,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-15 22:55:10,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:10,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 22:55:10,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:10,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:10,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-15 22:55:10,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620521801] [2019-11-15 22:55:10,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 22:55:10,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 22:55:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-15 22:55:10,598 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-15 22:55:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:10,656 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-15 22:55:10,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 22:55:10,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-15 22:55:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:10,659 INFO L225 Difference]: With dead ends: 42 [2019-11-15 22:55:10,660 INFO L226 Difference]: Without dead ends: 33 [2019-11-15 22:55:10,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-15 22:55:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-15 22:55:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-15 22:55:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:55:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-15 22:55:10,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-15 22:55:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:10,665 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-15 22:55:10,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 22:55:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-15 22:55:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 22:55:10,666 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:10,666 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:10,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:10,869 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-11-15 22:55:10,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:10,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101454062] [2019-11-15 22:55:10,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:10,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:10,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:11,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101454062] [2019-11-15 22:55:11,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089232280] [2019-11-15 22:55:11,050 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:11,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:55:11,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:11,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 22:55:11,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:11,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:11,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-15 22:55:11,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864587020] [2019-11-15 22:55:11,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 22:55:11,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 22:55:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-15 22:55:11,144 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-15 22:55:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:11,208 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-15 22:55:11,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 22:55:11,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-15 22:55:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:11,211 INFO L225 Difference]: With dead ends: 44 [2019-11-15 22:55:11,212 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 22:55:11,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-15 22:55:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 22:55:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-15 22:55:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 22:55:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-15 22:55:11,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-11-15 22:55:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:11,216 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-15 22:55:11,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 22:55:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-15 22:55:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 22:55:11,217 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:11,217 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:11,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:11,426 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-11-15 22:55:11,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:11,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392575346] [2019-11-15 22:55:11,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:11,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:11,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:11,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392575346] [2019-11-15 22:55:11,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222815229] [2019-11-15 22:55:11,609 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:11,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-15 22:55:11,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:11,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 22:55:11,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:11,868 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:11,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-15 22:55:11,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795455063] [2019-11-15 22:55:11,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 22:55:11,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 22:55:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:55:11,870 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-15 22:55:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:11,933 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-15 22:55:11,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 22:55:11,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-15 22:55:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:11,934 INFO L225 Difference]: With dead ends: 46 [2019-11-15 22:55:11,934 INFO L226 Difference]: Without dead ends: 37 [2019-11-15 22:55:11,934 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:55:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-15 22:55:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-15 22:55:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-15 22:55:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-15 22:55:11,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-11-15 22:55:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:11,938 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-15 22:55:11,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 22:55:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-15 22:55:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 22:55:11,939 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:11,939 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:12,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:12,140 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-11-15 22:55:12,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:12,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912156680] [2019-11-15 22:55:12,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:12,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:12,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:12,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912156680] [2019-11-15 22:55:12,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408941719] [2019-11-15 22:55:12,351 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:13,141 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-15 22:55:13,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:13,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-15 22:55:13,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:13,164 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:13,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-15 22:55:13,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130338833] [2019-11-15 22:55:13,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 22:55:13,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:13,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 22:55:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-15 22:55:13,166 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-11-15 22:55:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:13,223 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-15 22:55:13,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 22:55:13,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-15 22:55:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:13,224 INFO L225 Difference]: With dead ends: 48 [2019-11-15 22:55:13,224 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 22:55:13,224 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-15 22:55:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 22:55:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-15 22:55:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 22:55:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-15 22:55:13,227 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-11-15 22:55:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:13,228 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-15 22:55:13,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 22:55:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-15 22:55:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 22:55:13,228 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:13,228 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:13,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:13,432 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-11-15 22:55:13,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:13,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995150005] [2019-11-15 22:55:13,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:13,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:13,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995150005] [2019-11-15 22:55:13,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376864763] [2019-11-15 22:55:13,602 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:13,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-15 22:55:13,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:13,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:13,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-15 22:55:13,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399439657] [2019-11-15 22:55:13,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-15 22:55:13,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-15 22:55:13,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:55:13,700 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-15 22:55:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:13,757 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-15 22:55:13,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 22:55:13,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-15 22:55:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:13,758 INFO L225 Difference]: With dead ends: 50 [2019-11-15 22:55:13,758 INFO L226 Difference]: Without dead ends: 41 [2019-11-15 22:55:13,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:55:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-15 22:55:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-15 22:55:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-15 22:55:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-15 22:55:13,762 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-11-15 22:55:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:13,762 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-15 22:55:13,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-15 22:55:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-15 22:55:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 22:55:13,763 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:13,763 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:13,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:13,967 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:13,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-11-15 22:55:13,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:13,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957941499] [2019-11-15 22:55:13,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:13,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:13,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:14,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957941499] [2019-11-15 22:55:14,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372867132] [2019-11-15 22:55:14,175 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:14,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:55:14,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:14,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 22:55:14,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:14,269 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:14,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-15 22:55:14,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457448583] [2019-11-15 22:55:14,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 22:55:14,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 22:55:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-15 22:55:14,273 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-11-15 22:55:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:14,352 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-15 22:55:14,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 22:55:14,353 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-15 22:55:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:14,353 INFO L225 Difference]: With dead ends: 52 [2019-11-15 22:55:14,353 INFO L226 Difference]: Without dead ends: 43 [2019-11-15 22:55:14,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-15 22:55:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-15 22:55:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-15 22:55:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 22:55:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-15 22:55:14,358 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-11-15 22:55:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:14,358 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-15 22:55:14,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 22:55:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-15 22:55:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-15 22:55:14,359 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:14,359 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:14,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:14,560 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:14,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-11-15 22:55:14,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:14,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298737714] [2019-11-15 22:55:14,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:14,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:14,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:14,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298737714] [2019-11-15 22:55:14,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090341093] [2019-11-15 22:55:14,790 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:16,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-15 22:55:16,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:16,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-15 22:55:16,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:16,390 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:16,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-15 22:55:16,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108782878] [2019-11-15 22:55:16,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 22:55:16,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 22:55:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:55:16,392 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-11-15 22:55:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:16,448 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-15 22:55:16,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 22:55:16,449 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-15 22:55:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:16,449 INFO L225 Difference]: With dead ends: 54 [2019-11-15 22:55:16,449 INFO L226 Difference]: Without dead ends: 45 [2019-11-15 22:55:16,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:55:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-15 22:55:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-15 22:55:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-15 22:55:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-15 22:55:16,453 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-15 22:55:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:16,453 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-15 22:55:16,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 22:55:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-15 22:55:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-15 22:55:16,454 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:16,454 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:16,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:16,655 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-11-15 22:55:16,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:16,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974245908] [2019-11-15 22:55:16,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:16,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:16,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:16,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974245908] [2019-11-15 22:55:16,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473512106] [2019-11-15 22:55:16,880 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:16,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:55:16,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:16,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 22:55:16,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:16,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:16,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-15 22:55:16,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455157374] [2019-11-15 22:55:16,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-15 22:55:16,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-15 22:55:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-15 22:55:16,970 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-15 22:55:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:17,038 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-15 22:55:17,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 22:55:17,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-15 22:55:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:17,042 INFO L225 Difference]: With dead ends: 56 [2019-11-15 22:55:17,042 INFO L226 Difference]: Without dead ends: 47 [2019-11-15 22:55:17,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-15 22:55:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-15 22:55:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-15 22:55:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-15 22:55:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-15 22:55:17,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-11-15 22:55:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:17,047 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-15 22:55:17,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-15 22:55:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-15 22:55:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 22:55:17,047 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:17,047 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:17,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:17,248 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-11-15 22:55:17,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:17,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843340144] [2019-11-15 22:55:17,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:17,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:17,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:17,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843340144] [2019-11-15 22:55:17,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914391877] [2019-11-15 22:55:17,516 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:18,531 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-15 22:55:18,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:18,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 22:55:18,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:18,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:18,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-15 22:55:18,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158183585] [2019-11-15 22:55:18,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 22:55:18,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 22:55:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-15 22:55:18,559 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-11-15 22:55:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:18,654 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-15 22:55:18,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-15 22:55:18,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-15 22:55:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:18,655 INFO L225 Difference]: With dead ends: 58 [2019-11-15 22:55:18,655 INFO L226 Difference]: Without dead ends: 49 [2019-11-15 22:55:18,656 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-15 22:55:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-15 22:55:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-15 22:55:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-15 22:55:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-15 22:55:18,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-11-15 22:55:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:18,659 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-15 22:55:18,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 22:55:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-15 22:55:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-15 22:55:18,660 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:18,660 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:18,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:18,865 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:18,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-11-15 22:55:18,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:18,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963342234] [2019-11-15 22:55:18,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:18,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:18,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:19,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963342234] [2019-11-15 22:55:19,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436679674] [2019-11-15 22:55:19,129 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:25,405 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-15 22:55:25,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:55:25,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 22:55:25,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:25,445 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:25,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-15 22:55:25,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248469170] [2019-11-15 22:55:25,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-15 22:55:25,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-15 22:55:25,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-15 22:55:25,447 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-11-15 22:55:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:25,517 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-15 22:55:25,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 22:55:25,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-15 22:55:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:25,518 INFO L225 Difference]: With dead ends: 60 [2019-11-15 22:55:25,518 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 22:55:25,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-15 22:55:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 22:55:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-15 22:55:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 22:55:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-15 22:55:25,522 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-11-15 22:55:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:25,522 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-15 22:55:25,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-15 22:55:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-15 22:55:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-15 22:55:25,523 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:25,523 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:25,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:25,737 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-11-15 22:55:25,738 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:25,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798982504] [2019-11-15 22:55:25,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:25,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:25,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:26,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798982504] [2019-11-15 22:55:26,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030124797] [2019-11-15 22:55:26,003 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/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 [2019-11-15 22:55:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:55:26,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-15 22:55:26,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:55:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:55:26,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:55:26,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-15 22:55:26,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029186483] [2019-11-15 22:55:26,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-15 22:55:26,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:55:26,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-15 22:55:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-15 22:55:26,083 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-11-15 22:55:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:55:26,153 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-15 22:55:26,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-15 22:55:26,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-15 22:55:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:55:26,155 INFO L225 Difference]: With dead ends: 61 [2019-11-15 22:55:26,155 INFO L226 Difference]: Without dead ends: 52 [2019-11-15 22:55:26,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-15 22:55:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-15 22:55:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-15 22:55:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 22:55:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-15 22:55:26,159 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-11-15 22:55:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:55:26,159 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-15 22:55:26,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-15 22:55:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-15 22:55:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 22:55:26,160 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:55:26,160 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:55:26,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:55:26,367 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:55:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:55:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-11-15 22:55:26,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:55:26,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583907022] [2019-11-15 22:55:26,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:26,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:55:26,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:55:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:55:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 22:55:26,527 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 22:55:26,528 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 22:55:26,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:55:26 BoogieIcfgContainer [2019-11-15 22:55:26,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:55:26,595 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:55:26,595 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:55:26,596 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:55:26,596 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:55:06" (3/4) ... [2019-11-15 22:55:26,598 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 22:55:26,677 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_92c8d6cd-e781-475c-80c6-d1eba437b0e0/bin/uautomizer/witness.graphml [2019-11-15 22:55:26,678 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:55:26,680 INFO L168 Benchmark]: Toolchain (without parser) took 21054.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 182.5 MB). Free memory was 943.4 MB in the beginning and 1.0 GB in the end (delta: -67.3 MB). Peak memory consumption was 115.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:55:26,680 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:55:26,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:55:26,687 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.67 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. [2019-11-15 22:55:26,687 INFO L168 Benchmark]: Boogie Preprocessor took 22.98 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:55:26,688 INFO L168 Benchmark]: RCFGBuilder took 355.07 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. [2019-11-15 22:55:26,688 INFO L168 Benchmark]: TraceAbstraction took 20282.56 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 39.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 101.6 MB). Peak memory consumption was 141.0 MB. Max. memory is 11.5 GB. [2019-11-15 22:55:26,688 INFO L168 Benchmark]: Witness Printer took 82.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-11-15 22:55:26,690 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.67 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 22.98 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 355.07 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 20282.56 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 39.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 101.6 MB). Peak memory consumption was 141.0 MB. Max. memory is 11.5 GB. * Witness Printer took 82.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 20.2s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 10.6s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2641 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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 incorrect! Received shutdown request...