./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcompf.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_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 92985165ddadd5833b6dd8db60f80f6054278511 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 18:19:24,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:19:24,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:19:24,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:19:24,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:19:24,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:19:24,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:19:24,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:19:24,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:19:24,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:19:24,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:19:24,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:19:24,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:19:25,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:19:25,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:19:25,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:19:25,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:19:25,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:19:25,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:19:25,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:19:25,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:19:25,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:19:25,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:19:25,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:19:25,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:19:25,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:19:25,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:19:25,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:19:25,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:19:25,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:19:25,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:19:25,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:19:25,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:19:25,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:19:25,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:19:25,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:19:25,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:19:25,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:19:25,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:19:25,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:19:25,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:19:25,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:19:25,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:19:25,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:19:25,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:19:25,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:19:25,155 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:19:25,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:19:25,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:19:25,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:19:25,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:19:25,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:19:25,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:19:25,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:19:25,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:19:25,159 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:19:25,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:19:25,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:19:25,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:19:25,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:19:25,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:19:25,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:19:25,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:19:25,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:19:25,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:19:25,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:19:25,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:19:25,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:19:25,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:19:25,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:19:25,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:19:25,164 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_d7e09a28-bfcc-4664-9a8f-13011746a872/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92985165ddadd5833b6dd8db60f80f6054278511 [2020-11-29 18:19:25,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:19:25,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:19:25,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:19:25,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:19:25,501 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:19:25,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifcompf.c [2020-11-29 18:19:25,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/data/d17c26f78/d9fdbe8ce3924835be7902367d711279/FLAG4116d177a [2020-11-29 18:19:26,158 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:19:26,158 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/sv-benchmarks/c/array-fpi/ifcompf.c [2020-11-29 18:19:26,166 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/data/d17c26f78/d9fdbe8ce3924835be7902367d711279/FLAG4116d177a [2020-11-29 18:19:26,515 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/data/d17c26f78/d9fdbe8ce3924835be7902367d711279 [2020-11-29 18:19:26,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:19:26,521 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:19:26,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:19:26,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:19:26,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:19:26,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d414bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26, skipping insertion in model container [2020-11-29 18:19:26,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:19:26,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:19:26,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:19:26,841 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:19:26,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:19:26,882 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:19:26,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26 WrapperNode [2020-11-29 18:19:26,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:19:26,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:19:26,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:19:26,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:19:26,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:19:26,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:19:26,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:19:26,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:19:26,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:26,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:27,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:27,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... [2020-11-29 18:19:27,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:19:27,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:19:27,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:19:27,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:19:27,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 [2020-11-29 18:19:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:19:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:19:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:19:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:19:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:19:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:19:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:19:27,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:19:27,651 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-29 18:19:27,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:27 BoogieIcfgContainer [2020-11-29 18:19:27,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:19:27,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:19:27,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:19:27,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:19:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:19:26" (1/3) ... [2020-11-29 18:19:27,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483035a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:19:27, skipping insertion in model container [2020-11-29 18:19:27,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:19:26" (2/3) ... [2020-11-29 18:19:27,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483035a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:19:27, skipping insertion in model container [2020-11-29 18:19:27,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:27" (3/3) ... [2020-11-29 18:19:27,666 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-11-29 18:19:27,680 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:19:27,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:19:27,700 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:19:27,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:19:27,729 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:19:27,730 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:19:27,730 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:19:27,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:19:27,731 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:19:27,731 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:19:27,731 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:19:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-29 18:19:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 18:19:27,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:27,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:27,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2020-11-29 18:19:27,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:27,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879629780] [2020-11-29 18:19:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:28,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879629780] [2020-11-29 18:19:28,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:28,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:19:28,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794016492] [2020-11-29 18:19:28,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 18:19:28,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:19:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:19:28,054 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-11-29 18:19:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:28,079 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2020-11-29 18:19:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:19:28,082 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-29 18:19:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:28,094 INFO L225 Difference]: With dead ends: 51 [2020-11-29 18:19:28,094 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 18:19:28,100 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 [2020-11-29 18:19:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 18:19:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 18:19:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 18:19:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-11-29 18:19:28,146 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2020-11-29 18:19:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:28,149 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-11-29 18:19:28,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 18:19:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-11-29 18:19:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 18:19:28,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:28,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:28,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:19:28,152 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:28,156 INFO L82 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2020-11-29 18:19:28,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:28,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538651471] [2020-11-29 18:19:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:19:28,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538651471] [2020-11-29 18:19:28,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:28,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 18:19:28,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224750493] [2020-11-29 18:19:28,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 18:19:28,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:19:28,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:19:28,316 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2020-11-29 18:19:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:28,509 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-11-29 18:19:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:19:28,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 18:19:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:28,511 INFO L225 Difference]: With dead ends: 56 [2020-11-29 18:19:28,511 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 18:19:28,513 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 [2020-11-29 18:19:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 18:19:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-11-29 18:19:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 18:19:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-11-29 18:19:28,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2020-11-29 18:19:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:28,524 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-11-29 18:19:28,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 18:19:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-11-29 18:19:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 18:19:28,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:28,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:28,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:19:28,526 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2020-11-29 18:19:28,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:28,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751771999] [2020-11-29 18:19:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:28,571 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:19:28,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209478115] [2020-11-29 18:19:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 [2020-11-29 18:19:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:19:28,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:28,792 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 [2020-11-29 18:19:28,793 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:28,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:19:28,800 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:19:28,802 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-29 18:19:28,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:19:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 18:19:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751771999] [2020-11-29 18:19:28,923 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:19:28,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209478115] [2020-11-29 18:19:28,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:19:28,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:19:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747408968] [2020-11-29 18:19:28,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:19:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:19:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:19:28,926 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 5 states. [2020-11-29 18:19:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:29,108 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-29 18:19:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:19:29,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-29 18:19:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:29,111 INFO L225 Difference]: With dead ends: 37 [2020-11-29 18:19:29,111 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 18:19:29,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:19:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 18:19:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-11-29 18:19:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 18:19:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-11-29 18:19:29,121 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2020-11-29 18:19:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:29,122 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-29 18:19:29,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:19:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-11-29 18:19:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:19:29,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:29,125 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, 1, 1, 1, 1, 1] [2020-11-29 18:19:29,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 18:19:29,349 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:29,350 INFO L82 PathProgramCache]: Analyzing trace with hash -41748655, now seen corresponding path program 1 times [2020-11-29 18:19:29,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:29,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046903265] [2020-11-29 18:19:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:29,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:19:29,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682363229] [2020-11-29 18:19:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 [2020-11-29 18:19:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:19:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 18:19:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046903265] [2020-11-29 18:19:29,599 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:19:29,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682363229] [2020-11-29 18:19:29,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:19:29,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 18:19:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052911099] [2020-11-29 18:19:29,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 18:19:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:19:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:19:29,602 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-11-29 18:19:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:29,924 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2020-11-29 18:19:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:19:29,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-11-29 18:19:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:29,926 INFO L225 Difference]: With dead ends: 87 [2020-11-29 18:19:29,926 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 18:19:29,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:19:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 18:19:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-11-29 18:19:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 18:19:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-11-29 18:19:29,941 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-11-29 18:19:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:29,941 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-11-29 18:19:29,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 18:19:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-11-29 18:19:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 18:19:29,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:29,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:30,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:30,161 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1991906082, now seen corresponding path program 1 times [2020-11-29 18:19:30,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:30,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571972649] [2020-11-29 18:19:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:30,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:19:30,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211858798] [2020-11-29 18:19:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 [2020-11-29 18:19:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:19:30,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 18:19:30,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:30,322 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 14 treesize of output 12 [2020-11-29 18:19:30,326 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,332 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:19:30,334 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:4 [2020-11-29 18:19:30,392 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 [2020-11-29 18:19:30,392 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,412 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:19:30,412 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-11-29 18:19:30,545 INFO L350 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2020-11-29 18:19:30,546 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 3 case distinctions, treesize of input 31 treesize of output 59 [2020-11-29 18:19:30,548 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,602 INFO L625 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2020-11-29 18:19:30,607 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2020-11-29 18:19:30,638 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 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 18:19:30,639 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,652 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:19:30,652 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,652 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-11-29 18:19:30,768 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-11-29 18:19:30,768 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 38 treesize of output 32 [2020-11-29 18:19:30,770 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 18:19:30,792 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 18:19:30,795 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. [2020-11-29 18:19:30,795 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:50 [2020-11-29 18:19:31,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:19:31,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 18:19:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:19:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571972649] [2020-11-29 18:19:31,165 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:19:31,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211858798] [2020-11-29 18:19:31,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:19:31,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 18:19:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295514323] [2020-11-29 18:19:31,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 18:19:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 18:19:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:19:31,176 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 13 states. [2020-11-29 18:19:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:31,939 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-11-29 18:19:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 18:19:31,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-29 18:19:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:31,942 INFO L225 Difference]: With dead ends: 73 [2020-11-29 18:19:31,942 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 18:19:31,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:19:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 18:19:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-29 18:19:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 18:19:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-11-29 18:19:31,960 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 36 [2020-11-29 18:19:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:31,961 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-11-29 18:19:31,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 18:19:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-11-29 18:19:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 18:19:31,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:31,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:32,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:32,177 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1965578258, now seen corresponding path program 2 times [2020-11-29 18:19:32,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:32,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721323186] [2020-11-29 18:19:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:32,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:19:32,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668389446] [2020-11-29 18:19:32,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 [2020-11-29 18:19:32,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:19:32,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:19:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:19:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:19:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 18:19:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721323186] [2020-11-29 18:19:32,482 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 18:19:32,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668389446] [2020-11-29 18:19:32,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 18:19:32,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 18:19:32,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686719349] [2020-11-29 18:19:32,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 18:19:32,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:19:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:19:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:19:32,485 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 9 states. [2020-11-29 18:19:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:19:32,882 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2020-11-29 18:19:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:19:32,882 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-11-29 18:19:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:19:32,885 INFO L225 Difference]: With dead ends: 120 [2020-11-29 18:19:32,885 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 18:19:32,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-29 18:19:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 18:19:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2020-11-29 18:19:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 18:19:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-11-29 18:19:32,903 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 40 [2020-11-29 18:19:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:19:32,903 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-11-29 18:19:32,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 18:19:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-11-29 18:19:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 18:19:32,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:19:32,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:19:33,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:19:33,125 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:19:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:19:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -330916827, now seen corresponding path program 3 times [2020-11-29 18:19:33,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:19:33,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31953799] [2020-11-29 18:19:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:19:33,188 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 18:19:33,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576093126] [2020-11-29 18:19:33,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/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 [2020-11-29 18:19:33,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:19:33,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 18:19:33,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:19:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:19:33,441 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:19:33,511 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:19:33,512 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:19:33,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 18:19:33,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:19:33 BoogieIcfgContainer [2020-11-29 18:19:33,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:19:33,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:19:33,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:19:33,834 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:19:33,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:19:27" (3/4) ... [2020-11-29 18:19:33,836 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:19:33,942 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d7e09a28-bfcc-4664-9a8f-13011746a872/bin/uautomizer/witness.graphml [2020-11-29 18:19:33,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:19:33,943 INFO L168 Benchmark]: Toolchain (without parser) took 7422.25 ms. Allocated memory was 86.0 MB in the beginning and 146.8 MB in the end (delta: 60.8 MB). Free memory was 57.3 MB in the beginning and 75.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,944 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 45.4 MB in the beginning and 45.3 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:19:33,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.64 ms. Allocated memory is still 86.0 MB. Free memory was 57.1 MB in the beginning and 63.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.02 ms. Allocated memory is still 86.0 MB. Free memory was 63.9 MB in the beginning and 62.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,946 INFO L168 Benchmark]: Boogie Preprocessor took 77.26 ms. Allocated memory is still 86.0 MB. Free memory was 62.1 MB in the beginning and 60.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,947 INFO L168 Benchmark]: RCFGBuilder took 627.53 ms. Allocated memory is still 86.0 MB. Free memory was 60.7 MB in the beginning and 44.3 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,947 INFO L168 Benchmark]: TraceAbstraction took 6176.68 ms. Allocated memory was 86.0 MB in the beginning and 146.8 MB in the end (delta: 60.8 MB). Free memory was 43.6 MB in the beginning and 81.2 MB in the end (delta: -37.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,948 INFO L168 Benchmark]: Witness Printer took 108.95 ms. Allocated memory is still 146.8 MB. Free memory was 81.2 MB in the beginning and 75.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:19:33,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 45.4 MB in the beginning and 45.3 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.64 ms. Allocated memory is still 86.0 MB. Free memory was 57.1 MB in the beginning and 63.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.02 ms. Allocated memory is still 86.0 MB. Free memory was 63.9 MB in the beginning and 62.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 77.26 ms. Allocated memory is still 86.0 MB. Free memory was 62.1 MB in the beginning and 60.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 627.53 ms. Allocated memory is still 86.0 MB. Free memory was 60.7 MB in the beginning and 44.3 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6176.68 ms. Allocated memory was 86.0 MB in the beginning and 146.8 MB in the end (delta: 60.8 MB). Free memory was 43.6 MB in the beginning and 81.2 MB in the end (delta: -37.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * Witness Printer took 108.95 ms. Allocated memory is still 146.8 MB. Free memory was 81.2 MB in the beginning and 75.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 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); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=3] [L32] COND TRUE i