./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3764edd0ff82cc2ff392719542cb80230c47723 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-28 03:15:28,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:15:28,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:15:28,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:15:28,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:15:28,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:15:28,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:15:28,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:15:28,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:15:28,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:15:28,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:15:28,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:15:28,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:15:28,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:15:28,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:15:28,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:15:28,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:15:28,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:15:28,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:15:28,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:15:28,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:15:28,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:15:28,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:15:28,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:15:28,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:15:28,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:15:28,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:15:28,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:15:28,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:15:28,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:15:28,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:15:28,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:15:28,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:15:28,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:15:28,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:15:28,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:15:28,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:15:28,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:15:28,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:15:28,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:15:28,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:15:28,998 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:15:29,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:15:29,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:15:29,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:15:29,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:15:29,036 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:15:29,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:15:29,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:15:29,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:15:29,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:15:29,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:15:29,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:15:29,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:15:29,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:15:29,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:15:29,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:15:29,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:15:29,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:15:29,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:15:29,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:15:29,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:15:29,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:15:29,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:15:29,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:15:29,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:15:29,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:15:29,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:15:29,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:15:29,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:15:29,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:15:29,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3764edd0ff82cc2ff392719542cb80230c47723 [2020-11-28 03:15:29,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:15:29,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:15:29,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:15:29,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:15:29,387 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:15:29,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-11-28 03:15:29,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/data/8d491cded/970dda8b040e45c1954208b4a8f9716d/FLAGb9d632332 [2020-11-28 03:15:29,983 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:15:29,984 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-11-28 03:15:29,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/data/8d491cded/970dda8b040e45c1954208b4a8f9716d/FLAGb9d632332 [2020-11-28 03:15:30,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/data/8d491cded/970dda8b040e45c1954208b4a8f9716d [2020-11-28 03:15:30,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:15:30,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:15:30,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:15:30,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:15:30,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:15:30,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696246de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30, skipping insertion in model container [2020-11-28 03:15:30,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:15:30,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:15:30,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:15:30,606 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:15:30,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:15:30,664 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:15:30,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30 WrapperNode [2020-11-28 03:15:30,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:15:30,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:15:30,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:15:30,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:15:30,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:15:30,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:15:30,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:15:30,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:15:30,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... [2020-11-28 03:15:30,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:15:30,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:15:30,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:15:30,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:15:30,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/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 [2020-11-28 03:15:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:15:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:15:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:15:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:15:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:15:30,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:15:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:15:31,295 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:15:31,297 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 03:15:31,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:31 BoogieIcfgContainer [2020-11-28 03:15:31,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:15:31,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:15:31,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:15:31,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:15:31,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:15:30" (1/3) ... [2020-11-28 03:15:31,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a109dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:15:31, skipping insertion in model container [2020-11-28 03:15:31,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:30" (2/3) ... [2020-11-28 03:15:31,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a109dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:15:31, skipping insertion in model container [2020-11-28 03:15:31,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:31" (3/3) ... [2020-11-28 03:15:31,309 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-11-28 03:15:31,320 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:15:31,324 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:15:31,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:15:31,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:15:31,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:15:31,375 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:15:31,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:15:31,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:15:31,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:15:31,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:15:31,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:15:31,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-28 03:15:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:15:31,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:31,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:31,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-11-28 03:15:31,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:31,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508750269] [2020-11-28 03:15:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:15:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:15:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508750269] [2020-11-28 03:15:31,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:15:31,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:15:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445939415] [2020-11-28 03:15:31,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:15:31,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:15:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:15:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:15:31,611 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-28 03:15:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:15:31,627 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-11-28 03:15:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:15:31,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-28 03:15:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:15:31,640 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:15:31,641 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:15:31,645 INFO L677 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 [2020-11-28 03:15:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:15:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:15:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:15:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-28 03:15:31,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-11-28 03:15:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:15:31,694 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-28 03:15:31,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:15:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-28 03:15:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:15:31,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:31,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:31,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:15:31,695 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-11-28 03:15:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:31,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832300459] [2020-11-28 03:15:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:15:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:15:31,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832300459] [2020-11-28 03:15:31,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:15:31,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:15:31,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930591760] [2020-11-28 03:15:31,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:15:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:15:31,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:15:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:15:31,866 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-11-28 03:15:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:15:32,050 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-11-28 03:15:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:15:32,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:15:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:15:32,053 INFO L225 Difference]: With dead ends: 45 [2020-11-28 03:15:32,053 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 03:15:32,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:15:32,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 03:15:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-28 03:15:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:15:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 03:15:32,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-11-28 03:15:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:15:32,060 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 03:15:32,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:15:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 03:15:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:15:32,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:32,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:32,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:15:32,066 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-11-28 03:15:32,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:32,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287278275] [2020-11-28 03:15:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:32,101 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:15:32,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178854548] [2020-11-28 03:15:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/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 [2020-11-28 03:15:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:15:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:15:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:15:32,224 INFO L384 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 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-28 03:15:32,224 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:15:32,229 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:15:32,229 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:15:32,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-28 03:15:32,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:15:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:15:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287278275] [2020-11-28 03:15:32,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:15:32,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178854548] [2020-11-28 03:15:32,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:15:32,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:15:32,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687654358] [2020-11-28 03:15:32,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:15:32,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:15:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:15:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:15:32,307 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-11-28 03:15:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:15:32,412 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-11-28 03:15:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:15:32,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-28 03:15:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:15:32,414 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:15:32,414 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:15:32,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:15:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:15:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-28 03:15:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 03:15:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-28 03:15:32,420 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-11-28 03:15:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:15:32,421 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-28 03:15:32,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:15:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-28 03:15:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:15:32,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:32,428 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:32,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:15:32,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -689607655, now seen corresponding path program 1 times [2020-11-28 03:15:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:32,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370994034] [2020-11-28 03:15:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:32,674 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:15:32,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409575773] [2020-11-28 03:15:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/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 [2020-11-28 03:15:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:15:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:15:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:15:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:15:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370994034] [2020-11-28 03:15:32,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:15:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409575773] [2020-11-28 03:15:32,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:15:32,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:15:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531356248] [2020-11-28 03:15:32,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:15:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:15:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:15:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:15:32,847 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-11-28 03:15:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:15:33,032 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-11-28 03:15:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:15:33,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-28 03:15:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:15:33,036 INFO L225 Difference]: With dead ends: 65 [2020-11-28 03:15:33,036 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:15:33,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:15:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:15:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-11-28 03:15:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 03:15:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-28 03:15:33,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-11-28 03:15:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:15:33,049 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-28 03:15:33,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:15:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-28 03:15:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:15:33,050 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:33,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:33,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:15:33,280 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash 489568854, now seen corresponding path program 1 times [2020-11-28 03:15:33,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:33,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178514956] [2020-11-28 03:15:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:33,302 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:15:33,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898509001] [2020-11-28 03:15:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/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 [2020-11-28 03:15:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:15:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:15:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:15:33,395 INFO L384 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 [2020-11-28 03:15:33,397 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,401 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:15:33,402 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-11-28 03:15:33,420 INFO L384 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 11 treesize of output 7 [2020-11-28 03:15:33,420 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,428 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:15:33,428 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-11-28 03:15:33,489 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-11-28 03:15:33,489 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2020-11-28 03:15:33,490 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:15:33,499 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-11-28 03:15:33,564 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-11-28 03:15:33,564 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2020-11-28 03:15:33,565 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,577 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:15:33,578 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,578 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-11-28 03:15:33,671 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-11-28 03:15:33,672 INFO L384 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 2 case distinctions, treesize of input 53 treesize of output 46 [2020-11-28 03:15:33,673 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:15:33,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:15:33,694 INFO L545 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. [2020-11-28 03:15:33,695 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:74 [2020-11-28 03:15:33,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:15:33,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-28 03:15:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:15:33,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178514956] [2020-11-28 03:15:33,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:15:33,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898509001] [2020-11-28 03:15:33,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:15:33,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-28 03:15:33,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612729131] [2020-11-28 03:15:33,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:15:33,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:15:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:15:33,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:15:33,994 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 13 states. [2020-11-28 03:15:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:15:36,626 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-11-28 03:15:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:15:36,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-11-28 03:15:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:15:36,629 INFO L225 Difference]: With dead ends: 65 [2020-11-28 03:15:36,629 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:15:36,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:15:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:15:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-11-28 03:15:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:15:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-28 03:15:36,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-11-28 03:15:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:15:36,640 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-28 03:15:36,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:15:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-28 03:15:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:15:36,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:36,641 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:36,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:15:36,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash 414465226, now seen corresponding path program 2 times [2020-11-28 03:15:36,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:36,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449163457] [2020-11-28 03:15:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:36,870 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:15:36,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471421450] [2020-11-28 03:15:36,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/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 [2020-11-28 03:15:36,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:15:36,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:15:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:15:36,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:15:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:15:37,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449163457] [2020-11-28 03:15:37,022 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:15:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471421450] [2020-11-28 03:15:37,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:15:37,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-28 03:15:37,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450506011] [2020-11-28 03:15:37,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:15:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:15:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:15:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:15:37,024 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-11-28 03:15:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:15:37,285 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-11-28 03:15:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:15:37,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-11-28 03:15:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:15:37,289 INFO L225 Difference]: With dead ends: 89 [2020-11-28 03:15:37,289 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 03:15:37,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:15:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 03:15:37,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2020-11-28 03:15:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:15:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-28 03:15:37,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 32 [2020-11-28 03:15:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:15:37,303 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-28 03:15:37,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:15:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-28 03:15:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 03:15:37,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:15:37,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:15:37,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:15:37,520 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:15:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:15:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash 666565613, now seen corresponding path program 3 times [2020-11-28 03:15:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:15:37,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742340460] [2020-11-28 03:15:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:15:37,549 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:15:37,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887258905] [2020-11-28 03:15:37,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/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 [2020-11-28 03:15:37,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:15:37,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 03:15:37,667 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:15:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:15:37,711 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:15:37,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:15:37,750 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:15:37,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 03:15:38,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:15:38 BoogieIcfgContainer [2020-11-28 03:15:38,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:15:38,029 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:15:38,029 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:15:38,029 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:15:38,029 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:31" (3/4) ... [2020-11-28 03:15:38,031 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:15:38,103 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1f2d716e-8591-4c99-aae8-a5fcfc288bea/bin/uautomizer/witness.graphml [2020-11-28 03:15:38,103 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:15:38,104 INFO L168 Benchmark]: Toolchain (without parser) took 7736.54 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.5 MB in the beginning and 52.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:15:38,105 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 73.4 MB. Free memory was 31.9 MB in the beginning and 31.8 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:15:38,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.72 ms. Allocated memory is still 96.5 MB. Free memory was 64.3 MB in the beginning and 73.3 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:15:38,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.94 ms. Allocated memory is still 96.5 MB. Free memory was 73.3 MB in the beginning and 71.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:15:38,106 INFO L168 Benchmark]: Boogie Preprocessor took 24.63 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 70.7 MB in the end (delta: 956.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:15:38,107 INFO L168 Benchmark]: RCFGBuilder took 573.28 ms. Allocated memory is still 96.5 MB. Free memory was 70.7 MB in the beginning and 55.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:15:38,107 INFO L168 Benchmark]: TraceAbstraction took 6726.40 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 54.9 MB in the beginning and 56.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:15:38,108 INFO L168 Benchmark]: Witness Printer took 74.66 ms. Allocated memory is still 117.4 MB. Free memory was 56.9 MB in the beginning and 52.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:15:38,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 73.4 MB. Free memory was 31.9 MB in the beginning and 31.8 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.72 ms. Allocated memory is still 96.5 MB. Free memory was 64.3 MB in the beginning and 73.3 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.94 ms. Allocated memory is still 96.5 MB. Free memory was 73.3 MB in the beginning and 71.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.63 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 70.7 MB in the end (delta: 956.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 573.28 ms. Allocated memory is still 96.5 MB. Free memory was 70.7 MB in the beginning and 55.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6726.40 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 54.9 MB in the beginning and 56.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. * Witness Printer took 74.66 ms. Allocated memory is still 117.4 MB. Free memory was 56.9 MB in the beginning and 52.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=3] [L31] COND TRUE i