./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 2c6480746379e4e7ce6d546f9a1318408c455414 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-19 23:16:13,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:16:13,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:16:13,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:16:13,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:16:13,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:16:13,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:16:13,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:16:13,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:16:13,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:16:13,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:16:13,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:16:13,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:16:13,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:16:13,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:16:13,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:16:13,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:16:13,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:16:14,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:16:14,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:16:14,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:16:14,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:16:14,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:16:14,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:16:14,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:16:14,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:16:14,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:16:14,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:16:14,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:16:14,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:16:14,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:16:14,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:16:14,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:16:14,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:16:14,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:16:14,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:16:14,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:16:14,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:16:14,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:16:14,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:16:14,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:16:14,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 23:16:14,049 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:16:14,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:16:14,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:16:14,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:16:14,062 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:16:14,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:16:14,062 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:16:14,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:16:14,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:16:14,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:16:14,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 23:16:14,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:16:14,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 23:16:14,064 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:16:14,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 23:16:14,064 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:16:14,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 23:16:14,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:16:14,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:16:14,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:16:14,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:16:14,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:16:14,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:16:14,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:16:14,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 23:16:14,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 23:16:14,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 23:16:14,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 23:16:14,068 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_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 -> 2c6480746379e4e7ce6d546f9a1318408c455414 [2019-11-19 23:16:14,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:16:14,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:16:14,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:16:14,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:16:14,232 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:16:14,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/../../sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-19 23:16:14,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/data/da087ff22/1e327473b08f4c318da1c4cbfa7456ec/FLAGbb2fe6f5d [2019-11-19 23:16:14,698 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:16:14,699 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-19 23:16:14,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/data/da087ff22/1e327473b08f4c318da1c4cbfa7456ec/FLAGbb2fe6f5d [2019-11-19 23:16:14,718 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/data/da087ff22/1e327473b08f4c318da1c4cbfa7456ec [2019-11-19 23:16:14,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:16:14,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 23:16:14,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:16:14,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:16:14,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:16:14,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:16:14" (1/1) ... [2019-11-19 23:16:14,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382195c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:14, skipping insertion in model container [2019-11-19 23:16:14,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:16:14" (1/1) ... [2019-11-19 23:16:14,738 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:16:14,755 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:16:14,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:16:15,015 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:16:15,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:16:15,046 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:16:15,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15 WrapperNode [2019-11-19 23:16:15,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:16:15,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 23:16:15,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 23:16:15,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 23:16:15,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 23:16:15,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:16:15,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:16:15,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:16:15,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... [2019-11-19 23:16:15,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:16:15,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:16:15,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:16:15,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:16:15,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 23:16:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 23:16:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:16:15,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:16:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 23:16:15,388 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:16:15,388 INFO L285 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-19 23:16:15,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:16:15 BoogieIcfgContainer [2019-11-19 23:16:15,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:16:15,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:16:15,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:16:15,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:16:15,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:16:14" (1/3) ... [2019-11-19 23:16:15,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30304cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:16:15, skipping insertion in model container [2019-11-19 23:16:15,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:16:15" (2/3) ... [2019-11-19 23:16:15,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30304cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:16:15, skipping insertion in model container [2019-11-19 23:16:15,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:16:15" (3/3) ... [2019-11-19 23:16:15,396 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2019-11-19 23:16:15,405 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:16:15,411 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 23:16:15,421 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 23:16:15,441 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:16:15,442 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 23:16:15,442 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:16:15,442 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:16:15,457 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:16:15,457 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:16:15,457 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:16:15,457 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:16:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-19 23:16:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:16:15,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:15,477 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:15,478 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-19 23:16:15,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:15,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365939592] [2019-11-19 23:16:15,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:16:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:15,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365939592] [2019-11-19 23:16:15,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:16:15,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 23:16:15,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412604007] [2019-11-19 23:16:15,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 23:16:15,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 23:16:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 23:16:15,639 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-19 23:16:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:15,654 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-19 23:16:15,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 23:16:15,655 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-19 23:16:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:15,663 INFO L225 Difference]: With dead ends: 33 [2019-11-19 23:16:15,663 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 23:16:15,666 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 [2019-11-19 23:16:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 23:16:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-19 23:16:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-19 23:16:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-19 23:16:15,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-19 23:16:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:15,698 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-19 23:16:15,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 23:16:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-19 23:16:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:16:15,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:15,699 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:15,699 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-19 23:16:15,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:15,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343826680] [2019-11-19 23:16:15,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:15,717 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:15,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240685171] [2019-11-19 23:16:15,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:16:15,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 23:16:15,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:15,875 INFO L343 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2019-11-19 23:16:15,876 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2019-11-19 23:16:15,877 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:16:15,888 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:16:15,889 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-19 23:16:15,889 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2019-11-19 23:16:15,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:15,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343826680] [2019-11-19 23:16:15,939 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:15,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240685171] [2019-11-19 23:16:15,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:16:15,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:16:15,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441605384] [2019-11-19 23:16:15,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:16:15,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:16:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:16:15,942 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-19 23:16:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:16,048 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-19 23:16:16,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:16:16,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-19 23:16:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:16,050 INFO L225 Difference]: With dead ends: 32 [2019-11-19 23:16:16,050 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 23:16:16,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:16:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 23:16:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-19 23:16:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 23:16:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-19 23:16:16,056 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2019-11-19 23:16:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:16,057 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-19 23:16:16,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:16:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-19 23:16:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 23:16:16,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:16,058 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:16,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:16,267 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 130601367, now seen corresponding path program 1 times [2019-11-19 23:16:16,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:16,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092301130] [2019-11-19 23:16:16,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:16,287 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:16,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338512601] [2019-11-19 23:16:16,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:16:16,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:16:16,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:16,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092301130] [2019-11-19 23:16:16,371 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:16,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338512601] [2019-11-19 23:16:16,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:16:16,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:16:16,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163199221] [2019-11-19 23:16:16,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:16:16,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:16:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:16:16,373 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-19 23:16:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:16,463 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-19 23:16:16,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:16:16,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 23:16:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:16,465 INFO L225 Difference]: With dead ends: 47 [2019-11-19 23:16:16,465 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 23:16:16,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:16:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 23:16:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-19 23:16:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 23:16:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-19 23:16:16,470 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-19 23:16:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:16,471 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-19 23:16:16,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:16:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-19 23:16:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 23:16:16,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:16,472 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:16,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:16,675 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:16,675 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-11-19 23:16:16,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:16,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101911584] [2019-11-19 23:16:16,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:16,702 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:16,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031211967] [2019-11-19 23:16:16,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:16:16,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:16:16,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:16,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101911584] [2019-11-19 23:16:16,776 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:16,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031211967] [2019-11-19 23:16:16,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 23:16:16,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 23:16:16,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730218932] [2019-11-19 23:16:16,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:16:16,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:16:16,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:16:16,778 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-19 23:16:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:16,856 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-19 23:16:16,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:16:16,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 23:16:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:16,857 INFO L225 Difference]: With dead ends: 42 [2019-11-19 23:16:16,857 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 23:16:16,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:16:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 23:16:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-19 23:16:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 23:16:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-19 23:16:16,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-19 23:16:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:16,863 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-19 23:16:16,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:16:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-19 23:16:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 23:16:16,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:16,864 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:17,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:17,066 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash 437833903, now seen corresponding path program 1 times [2019-11-19 23:16:17,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:17,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895885098] [2019-11-19 23:16:17,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:17,076 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:17,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990244596] [2019-11-19 23:16:17,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:16:17,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:16:17,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:17,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895885098] [2019-11-19 23:16:17,184 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:17,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990244596] [2019-11-19 23:16:17,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:16:17,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-19 23:16:17,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926492663] [2019-11-19 23:16:17,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:16:17,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:16:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:16:17,186 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-19 23:16:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:17,274 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-19 23:16:17,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:16:17,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-19 23:16:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:17,278 INFO L225 Difference]: With dead ends: 39 [2019-11-19 23:16:17,278 INFO L226 Difference]: Without dead ends: 25 [2019-11-19 23:16:17,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:16:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-19 23:16:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-11-19 23:16:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 23:16:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-19 23:16:17,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-19 23:16:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:17,282 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-19 23:16:17,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:16:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-19 23:16:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 23:16:17,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:17,282 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:17,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:17,490 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-11-19 23:16:17,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:17,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727129773] [2019-11-19 23:16:17,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:17,503 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:17,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017048860] [2019-11-19 23:16:17,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:16:17,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 23:16:17,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:17,597 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 23:16:17,598 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:16:17,605 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:16:17,610 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2019-11-19 23:16:17,610 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:16:17,616 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:16:17,617 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:16:17,617 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2019-11-19 23:16:17,687 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-19 23:16:17,687 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2019-11-19 23:16:17,689 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:16:17,728 INFO L567 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2019-11-19 23:16:17,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:17,730 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 23:16:17,731 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2019-11-19 23:16:17,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:17,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:17,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:17,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:17,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:17,873 INFO L392 ElimStorePlain]: Different costs {12=[|v_#memory_int_12|], 20=[v_prenex_4]} [2019-11-19 23:16:17,880 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:16:17,884 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-19 23:16:17,884 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2019-11-19 23:16:17,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:16:17,925 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:16:17,934 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 23:16:17,968 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-19 23:16:17,968 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 89 [2019-11-19 23:16:17,970 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:16:18,051 INFO L567 ElimStorePlain]: treesize reduction 51, result has 69.3 percent of original size [2019-11-19 23:16:18,053 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-11-19 23:16:18,053 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2019-11-19 23:16:18,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:16:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:18,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727129773] [2019-11-19 23:16:18,193 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:18,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017048860] [2019-11-19 23:16:18,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 23:16:18,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-19 23:16:18,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592775362] [2019-11-19 23:16:18,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:16:18,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:16:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:16:18,196 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-11-19 23:16:18,505 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2019-11-19 23:16:18,985 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2019-11-19 23:16:19,184 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-11-19 23:16:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:19,237 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-19 23:16:19,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:16:19,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-19 23:16:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:19,240 INFO L225 Difference]: With dead ends: 42 [2019-11-19 23:16:19,240 INFO L226 Difference]: Without dead ends: 40 [2019-11-19 23:16:19,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:16:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-19 23:16:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2019-11-19 23:16:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 23:16:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-19 23:16:19,249 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2019-11-19 23:16:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:19,249 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-19 23:16:19,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:16:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-19 23:16:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:16:19,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:19,251 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:19,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:19,451 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:19,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -602215277, now seen corresponding path program 2 times [2019-11-19 23:16:19,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:19,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128552658] [2019-11-19 23:16:19,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:19,464 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:19,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70876928] [2019-11-19 23:16:19,465 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:19,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:16:19,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:16:19,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:16:19,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:19,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128552658] [2019-11-19 23:16:19,548 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:19,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70876928] [2019-11-19 23:16:19,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 23:16:19,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 23:16:19,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959530807] [2019-11-19 23:16:19,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:16:19,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:16:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:16:19,549 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-19 23:16:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:19,694 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-19 23:16:19,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:16:19,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 23:16:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:19,695 INFO L225 Difference]: With dead ends: 59 [2019-11-19 23:16:19,696 INFO L226 Difference]: Without dead ends: 50 [2019-11-19 23:16:19,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:16:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-19 23:16:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2019-11-19 23:16:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 23:16:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-19 23:16:19,702 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2019-11-19 23:16:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:19,702 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-19 23:16:19,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:16:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-19 23:16:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:16:19,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:19,703 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:19,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:19,909 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash -508830509, now seen corresponding path program 3 times [2019-11-19 23:16:19,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:19,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296008671] [2019-11-19 23:16:19,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:19,920 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:19,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999959655] [2019-11-19 23:16:19,920 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:19,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 23:16:19,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:16:19,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 23:16:19,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:16:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:16:20,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296008671] [2019-11-19 23:16:20,005 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 23:16:20,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999959655] [2019-11-19 23:16:20,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 23:16:20,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 23:16:20,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785762350] [2019-11-19 23:16:20,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:16:20,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:16:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:16:20,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:16:20,007 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-19 23:16:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:16:20,126 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-19 23:16:20,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:16:20,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 23:16:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:16:20,127 INFO L225 Difference]: With dead ends: 54 [2019-11-19 23:16:20,127 INFO L226 Difference]: Without dead ends: 47 [2019-11-19 23:16:20,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:16:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-19 23:16:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-19 23:16:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 23:16:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-19 23:16:20,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-11-19 23:16:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:16:20,133 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-19 23:16:20,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:16:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-19 23:16:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:16:20,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:16:20,134 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:16:20,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:20,335 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:16:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:16:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 575675563, now seen corresponding path program 1 times [2019-11-19 23:16:20,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:16:20,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425614109] [2019-11-19 23:16:20,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:16:20,346 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 23:16:20,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042248604] [2019-11-19 23:16:20,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/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 [2019-11-19 23:16:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:16:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:16:20,438 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 23:16:20,438 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 23:16:20,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:16:20,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:16:20 BoogieIcfgContainer [2019-11-19 23:16:20,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:16:20,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:16:20,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:16:20,672 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:16:20,672 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:16:15" (3/4) ... [2019-11-19 23:16:20,674 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 23:16:20,730 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b6bcdcaa-10ef-47cc-aab4-250714eb21b1/bin/uautomizer/witness.graphml [2019-11-19 23:16:20,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:16:20,732 INFO L168 Benchmark]: Toolchain (without parser) took 6010.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.3 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -112.0 MB). Peak memory consumption was 77.3 MB. Max. memory is 11.5 GB. [2019-11-19 23:16:20,733 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:16:20,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.3 MB). Free memory was 951.5 MB in the beginning and 1.2 GB in the end (delta: -232.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-19 23:16:20,733 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.25 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. [2019-11-19 23:16:20,734 INFO L168 Benchmark]: Boogie Preprocessor took 22.21 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. [2019-11-19 23:16:20,734 INFO L168 Benchmark]: RCFGBuilder took 284.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:16:20,735 INFO L168 Benchmark]: TraceAbstraction took 5277.12 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: 90.1 MB). Peak memory consumption was 90.1 MB. Max. memory is 11.5 GB. [2019-11-19 23:16:20,735 INFO L168 Benchmark]: Witness Printer took 62.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-19 23:16:20,737 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 321.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.3 MB). Free memory was 951.5 MB in the beginning and 1.2 GB in the end (delta: -232.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.25 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 22.21 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. * RCFGBuilder took 284.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5277.12 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: 90.1 MB). Peak memory consumption was 90.1 MB. Max. memory is 11.5 GB. * Witness Printer took 62.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 1 [L27] b[0] = 1 [L28] i=1 VAL [N=2] [L28] COND TRUE i