./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test27-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 dfe25ce750efb74d780ec4e5d4c6de923e91c57e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-6b5699a [2019-11-25 08:57:00,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:57:00,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:57:00,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:57:00,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:57:00,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:57:00,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:57:00,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:57:00,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:57:00,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:57:00,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:57:00,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:57:00,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:57:00,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:57:00,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:57:00,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:57:00,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:57:00,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:57:00,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:57:00,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:57:00,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:57:00,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:57:00,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:57:00,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:57:00,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:57:00,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:57:00,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:57:00,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:57:00,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:57:00,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:57:00,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:57:00,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:57:00,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:57:00,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:57:00,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:57:00,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:57:00,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:57:00,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:57:00,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:57:00,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:57:00,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:57:00,062 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:57:00,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:57:00,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:57:00,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:57:00,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:57:00,076 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:57:00,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:57:00,076 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:57:00,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:57:00,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:57:00,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:57:00,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:57:00,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:57:00,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:57:00,077 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:57:00,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:57:00,078 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:57:00,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:57:00,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:57:00,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:57:00,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:57:00,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:57:00,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:57:00,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:57:00,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:57:00,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:57:00,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:57:00,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:57:00,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:57:00,081 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_98e7ba9c-1de4-411d-95a9-265f48167d01/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 -> dfe25ce750efb74d780ec4e5d4c6de923e91c57e [2019-11-25 08:57:00,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:57:00,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:57:00,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:57:00,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:57:00,229 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:57:00,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test27-2.c [2019-11-25 08:57:00,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/data/8c6f60865/8d8a0f9343f74fa1bbb88e32a78df076/FLAGf57a04646 [2019-11-25 08:57:00,700 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:57:00,700 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/sv-benchmarks/c/ldv-regression/test27-2.c [2019-11-25 08:57:00,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/data/8c6f60865/8d8a0f9343f74fa1bbb88e32a78df076/FLAGf57a04646 [2019-11-25 08:57:01,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/data/8c6f60865/8d8a0f9343f74fa1bbb88e32a78df076 [2019-11-25 08:57:01,078 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:57:01,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:57:01,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:01,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:57:01,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:57:01,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f191f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01, skipping insertion in model container [2019-11-25 08:57:01,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:57:01,112 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:57:01,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:01,338 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:57:01,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:01,375 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:57:01,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01 WrapperNode [2019-11-25 08:57:01,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:01,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:57:01,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:57:01,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:57:01,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:57:01,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:57:01,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:57:01,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:57:01,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... [2019-11-25 08:57:01,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:57:01,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:57:01,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:57:01,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:57:01,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:57:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:57:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:57:01,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:57:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:57:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:57:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:57:01,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:57:01,863 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:57:01,863 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-25 08:57:01,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:01 BoogieIcfgContainer [2019-11-25 08:57:01,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:57:01,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:57:01,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:57:01,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:57:01,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:57:01" (1/3) ... [2019-11-25 08:57:01,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c066ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:01, skipping insertion in model container [2019-11-25 08:57:01,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:01" (2/3) ... [2019-11-25 08:57:01,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c066ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:01, skipping insertion in model container [2019-11-25 08:57:01,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:01" (3/3) ... [2019-11-25 08:57:01,872 INFO L109 eAbstractionObserver]: Analyzing ICFG test27-2.c [2019-11-25 08:57:01,881 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:57:01,887 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:57:01,899 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:57:01,920 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:57:01,920 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:57:01,920 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:57:01,920 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:57:01,921 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:57:01,921 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:57:01,921 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:57:01,921 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:57:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-25 08:57:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:57:01,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:01,940 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:01,941 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:01,946 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2019-11-25 08:57:01,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:01,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440943380] [2019-11-25 08:57:01,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:02,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440943380] [2019-11-25 08:57:02,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:02,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:57:02,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317401377] [2019-11-25 08:57:02,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:57:02,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:02,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:57:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:57:02,171 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-25 08:57:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:02,185 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-11-25 08:57:02,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:57:02,186 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-25 08:57:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:02,193 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:57:02,193 INFO L226 Difference]: Without dead ends: 13 [2019-11-25 08:57:02,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:57:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-25 08:57:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-25 08:57:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-25 08:57:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-25 08:57:02,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-25 08:57:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:02,226 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-25 08:57:02,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:57:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-25 08:57:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:57:02,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:02,227 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:02,228 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:02,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2019-11-25 08:57:02,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:02,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40140564] [2019-11-25 08:57:02,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:02,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40140564] [2019-11-25 08:57:02,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:02,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:57:02,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248623565] [2019-11-25 08:57:02,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:57:02,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:57:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:57:02,296 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-25 08:57:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:02,317 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-25 08:57:02,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:57:02,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-25 08:57:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:02,318 INFO L225 Difference]: With dead ends: 24 [2019-11-25 08:57:02,319 INFO L226 Difference]: Without dead ends: 15 [2019-11-25 08:57:02,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:57:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-25 08:57:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-25 08:57:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-25 08:57:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-25 08:57:02,323 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-25 08:57:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:02,323 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-25 08:57:02,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:57:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-25 08:57:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:57:02,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:02,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:02,325 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2019-11-25 08:57:02,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:02,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521463491] [2019-11-25 08:57:02,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:02,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521463491] [2019-11-25 08:57:02,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697855519] [2019-11-25 08:57:02,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:02,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:57:02,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:02,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:02,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-25 08:57:02,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119427472] [2019-11-25 08:57:02,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:57:02,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:57:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:57:02,533 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-25 08:57:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:02,584 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-25 08:57:02,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:57:02,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-25 08:57:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:02,587 INFO L225 Difference]: With dead ends: 26 [2019-11-25 08:57:02,587 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:57:02,587 INFO L630 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 [2019-11-25 08:57:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:57:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-25 08:57:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-25 08:57:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-25 08:57:02,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-25 08:57:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:02,591 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-25 08:57:02,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:57:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-25 08:57:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:57:02,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:02,592 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:02,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:02,798 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:02,799 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2019-11-25 08:57:02,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:02,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627537224] [2019-11-25 08:57:02,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:02,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627537224] [2019-11-25 08:57:02,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586658578] [2019-11-25 08:57:02,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:02,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:57:02,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:02,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:57:02,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:02,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:02,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-25 08:57:02,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078174929] [2019-11-25 08:57:02,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:57:02,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:02,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:57:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:57:02,978 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-25 08:57:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:03,026 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-25 08:57:03,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:57:03,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-25 08:57:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:03,027 INFO L225 Difference]: With dead ends: 28 [2019-11-25 08:57:03,027 INFO L226 Difference]: Without dead ends: 19 [2019-11-25 08:57:03,028 INFO L630 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 [2019-11-25 08:57:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-25 08:57:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-25 08:57:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-25 08:57:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-25 08:57:03,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-25 08:57:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:03,032 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-25 08:57:03,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:57:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-25 08:57:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:57:03,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:03,033 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:03,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:03,234 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2019-11-25 08:57:03,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:03,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972895309] [2019-11-25 08:57:03,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:03,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972895309] [2019-11-25 08:57:03,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244848200] [2019-11-25 08:57:03,347 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:03,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:57:03,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:03,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:57:03,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:03,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:03,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:57:03,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292343457] [2019-11-25 08:57:03,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:57:03,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:57:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:57:03,626 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-25 08:57:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:03,674 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-25 08:57:03,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:57:03,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-25 08:57:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:03,676 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:57:03,677 INFO L226 Difference]: Without dead ends: 21 [2019-11-25 08:57:03,677 INFO L630 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 [2019-11-25 08:57:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-25 08:57:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-25 08:57:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-25 08:57:03,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-25 08:57:03,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-25 08:57:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:03,684 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-25 08:57:03,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:57:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-25 08:57:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:57:03,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:03,686 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:03,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:03,896 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:03,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2019-11-25 08:57:03,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:03,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106619811] [2019-11-25 08:57:03,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:04,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106619811] [2019-11-25 08:57:04,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514212203] [2019-11-25 08:57:04,034 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:04,116 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:57:04,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:04,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:57:04,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:04,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:04,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-25 08:57:04,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331209982] [2019-11-25 08:57:04,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:57:04,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:57:04,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:57:04,139 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-25 08:57:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:04,198 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-25 08:57:04,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:57:04,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-25 08:57:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:04,201 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:57:04,201 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:57:04,202 INFO L630 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 [2019-11-25 08:57:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:57:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-25 08:57:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-25 08:57:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-25 08:57:04,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-25 08:57:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:04,206 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-25 08:57:04,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:57:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-25 08:57:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:57:04,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:04,207 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:04,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:04,414 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2019-11-25 08:57:04,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:04,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822983978] [2019-11-25 08:57:04,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:04,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822983978] [2019-11-25 08:57:04,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274802318] [2019-11-25 08:57:04,519 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:05,378 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-25 08:57:05,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:05,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:57:05,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:05,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:05,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-25 08:57:05,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571388780] [2019-11-25 08:57:05,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:57:05,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:57:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:57:05,496 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-25 08:57:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:05,542 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-25 08:57:05,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:57:05,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-25 08:57:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:05,543 INFO L225 Difference]: With dead ends: 34 [2019-11-25 08:57:05,543 INFO L226 Difference]: Without dead ends: 25 [2019-11-25 08:57:05,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:57:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-25 08:57:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-25 08:57:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:57:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-25 08:57:05,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-25 08:57:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:05,548 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-25 08:57:05,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:57:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-25 08:57:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:57:05,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:05,550 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:05,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:05,750 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2019-11-25 08:57:05,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:05,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613334658] [2019-11-25 08:57:05,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:05,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613334658] [2019-11-25 08:57:05,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820754454] [2019-11-25 08:57:05,841 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:07,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-25 08:57:07,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:07,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:57:07,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:07,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:07,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-25 08:57:07,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818012171] [2019-11-25 08:57:07,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:57:07,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:57:07,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:57:07,511 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-25 08:57:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:07,565 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-25 08:57:07,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:57:07,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-25 08:57:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:07,567 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:57:07,567 INFO L226 Difference]: Without dead ends: 27 [2019-11-25 08:57:07,568 INFO L630 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 [2019-11-25 08:57:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-25 08:57:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-25 08:57:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:57:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-25 08:57:07,573 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-25 08:57:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:07,573 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-25 08:57:07,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:57:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-25 08:57:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-25 08:57:07,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:07,575 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:07,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:07,781 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2019-11-25 08:57:07,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:07,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498539117] [2019-11-25 08:57:07,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:07,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498539117] [2019-11-25 08:57:07,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108319821] [2019-11-25 08:57:07,892 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:07,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:57:07,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:07,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:07,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-25 08:57:07,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322028199] [2019-11-25 08:57:07,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:57:07,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:57:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:57:07,981 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-25 08:57:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:08,048 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-25 08:57:08,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:57:08,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-25 08:57:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:08,052 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:57:08,052 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:57:08,052 INFO L630 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 [2019-11-25 08:57:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:57:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-25 08:57:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:57:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-25 08:57:08,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-25 08:57:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:08,059 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-25 08:57:08,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:57:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-25 08:57:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:57:08,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:08,060 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:08,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:08,261 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2019-11-25 08:57:08,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:08,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932265592] [2019-11-25 08:57:08,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:08,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932265592] [2019-11-25 08:57:08,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000033324] [2019-11-25 08:57:08,408 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:08,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:57:08,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:08,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:57:08,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:08,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:08,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-25 08:57:08,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471887253] [2019-11-25 08:57:08,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:57:08,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:08,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:57:08,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:57:08,520 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-25 08:57:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:08,583 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-25 08:57:08,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:57:08,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-25 08:57:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:08,584 INFO L225 Difference]: With dead ends: 40 [2019-11-25 08:57:08,585 INFO L226 Difference]: Without dead ends: 31 [2019-11-25 08:57:08,585 INFO L630 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 [2019-11-25 08:57:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-25 08:57:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-25 08:57:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-25 08:57:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-25 08:57:08,588 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-25 08:57:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:08,589 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-25 08:57:08,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:57:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-25 08:57:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-25 08:57:08,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:08,590 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:08,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:08,790 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2019-11-25 08:57:08,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:08,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505560888] [2019-11-25 08:57:08,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:08,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505560888] [2019-11-25 08:57:08,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389552820] [2019-11-25 08:57:08,910 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/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 [2019-11-25 08:57:20,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-25 08:57:20,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:57:20,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:57:20,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:57:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:20,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:57:20,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-25 08:57:20,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607861904] [2019-11-25 08:57:20,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:57:20,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:57:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:57:20,757 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-25 08:57:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:20,838 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-25 08:57:20,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:57:20,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-25 08:57:20,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:20,842 INFO L225 Difference]: With dead ends: 41 [2019-11-25 08:57:20,842 INFO L226 Difference]: Without dead ends: 32 [2019-11-25 08:57:20,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:57:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-25 08:57:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-25 08:57:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:57:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-25 08:57:20,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-25 08:57:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:20,846 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-25 08:57:20,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:57:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-25 08:57:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-25 08:57:20,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:20,847 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:21,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:57:21,048 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2019-11-25 08:57:21,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:21,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282370500] [2019-11-25 08:57:21,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:21,382 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:57:21,384 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:57:21,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:57:21 BoogieIcfgContainer [2019-11-25 08:57:21,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:57:21,441 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:57:21,442 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:57:21,442 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:57:21,442 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:01" (3/4) ... [2019-11-25 08:57:21,444 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:57:21,533 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_98e7ba9c-1de4-411d-95a9-265f48167d01/bin/uautomizer/witness.graphml [2019-11-25 08:57:21,533 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:57:21,535 INFO L168 Benchmark]: Toolchain (without parser) took 20455.70 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.7 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -115.6 MB). Peak memory consumption was 115.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:21,536 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:21,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -217.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:21,537 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:21,537 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:21,538 INFO L168 Benchmark]: RCFGBuilder took 407.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:21,539 INFO L168 Benchmark]: TraceAbstraction took 19575.46 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 53.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 66.1 MB). Peak memory consumption was 119.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:21,540 INFO L168 Benchmark]: Witness Printer took 91.87 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:21,545 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 296.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -217.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 54.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 407.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19575.46 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 53.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 66.1 MB). Peak memory consumption was 119.6 MB. Max. memory is 11.5 GB. * Witness Printer took 91.87 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy dummy; [L23] struct dummy *dummies[10]; [L24] int a[10]; [L25] int i, *pa; [L26] i = __VERIFIER_nondet_int() [L27] int j = 0; [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND TRUE j < 10 [L28] a[j] = __VERIFIER_nondet_int() [L32] dummies[j] = 0 [L27] j++ [L27] COND FALSE !(j < 10) [L34] COND TRUE i >= 0 && i < 9 [L35] a[i] = i [L36] dummy.array = &a[i] [L37] dummies[i + 1] = &dummy [L38] cont.array = &dummies[0] [L39] EXPR cont.array [L39] EXPR cont.array[i] [L39] EXPR cont.array[i]->array [L39] pa = &cont.array[i]->array[i] [L40] EXPR a[i] [L40] COND TRUE a[i] > 0 [L41] EXPR dummies[i + 1] [L41] EXPR dummies[i + 1]->array [L41] EXPR dummies[i + 1]->array[i] [L41] i = dummies[i + 1]->array[i] - 10 [L42] EXPR \read(*pa) [L42] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[i] [L16] EXPR pc->array[i]->array [L16] EXPR pc->array[i]->array[i] [L16] return pc->array[i]->array[i] == i; [L45] COND TRUE !check(&cont, i) [L53] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.5s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 55 SDslu, 520 SDs, 0 SdLazy, 189 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=11, 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, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 15.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 16761 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1197 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 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...