./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c931059f8de62343b75e0a40b805bb4dbf7de2b8 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 01:09:59,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:09:59,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:09:59,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:09:59,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:09:59,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:09:59,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:09:59,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:09:59,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:09:59,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:09:59,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:09:59,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:09:59,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:09:59,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:09:59,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:09:59,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:09:59,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:09:59,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:09:59,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:09:59,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:09:59,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:09:59,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:09:59,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:09:59,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:09:59,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:09:59,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:09:59,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:09:59,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:09:59,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:09:59,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:09:59,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:09:59,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:09:59,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:09:59,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:09:59,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:09:59,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:09:59,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:09:59,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:09:59,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:09:59,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:09:59,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:09:59,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 01:09:59,842 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:09:59,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:09:59,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:09:59,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:09:59,844 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:09:59,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:09:59,844 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:09:59,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:09:59,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:09:59,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:09:59,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 01:09:59,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 01:09:59,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 01:09:59,845 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:09:59,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 01:09:59,846 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:09:59,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 01:09:59,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:09:59,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:09:59,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 01:09:59,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 01:09:59,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:09:59,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:09:59,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 01:09:59,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 01:09:59,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 01:09:59,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 01:09:59,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 01:09:59,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c931059f8de62343b75e0a40b805bb4dbf7de2b8 [2019-11-20 01:09:59,983 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:09:59,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:09:59,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:09:59,998 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:09:59,999 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:09:59,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s3iff.c [2019-11-20 01:10:00,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/data/99995701c/479f7f5970b64fbfbda70cd8b8f56369/FLAGc4fbec33a [2019-11-20 01:10:00,431 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:10:00,433 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/sv-benchmarks/c/array-fpi/s3iff.c [2019-11-20 01:10:00,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/data/99995701c/479f7f5970b64fbfbda70cd8b8f56369/FLAGc4fbec33a [2019-11-20 01:10:00,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/data/99995701c/479f7f5970b64fbfbda70cd8b8f56369 [2019-11-20 01:10:00,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:10:00,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 01:10:00,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:10:00,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:10:00,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:10:00,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:10:00" (1/1) ... [2019-11-20 01:10:00,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5d92ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:00, skipping insertion in model container [2019-11-20 01:10:00,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:10:00" (1/1) ... [2019-11-20 01:10:00,879 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:10:00,893 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:10:01,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:10:01,093 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:10:01,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:10:01,142 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:10:01,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01 WrapperNode [2019-11-20 01:10:01,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:10:01,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 01:10:01,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 01:10:01,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 01:10:01,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 01:10:01,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:10:01,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:10:01,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:10:01,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... [2019-11-20 01:10:01,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:10:01,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:10:01,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:10:01,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:10:01,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:10:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 01:10:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 01:10:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 01:10:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:10:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:10:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 01:10:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 01:10:01,448 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:10:01,449 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 01:10:01,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:10:01 BoogieIcfgContainer [2019-11-20 01:10:01,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:10:01,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 01:10:01,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 01:10:01,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 01:10:01,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 01:10:00" (1/3) ... [2019-11-20 01:10:01,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106bedd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:10:01, skipping insertion in model container [2019-11-20 01:10:01,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:10:01" (2/3) ... [2019-11-20 01:10:01,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106bedd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:10:01, skipping insertion in model container [2019-11-20 01:10:01,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:10:01" (3/3) ... [2019-11-20 01:10:01,456 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2019-11-20 01:10:01,464 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 01:10:01,469 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 01:10:01,478 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 01:10:01,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 01:10:01,497 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 01:10:01,497 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 01:10:01,497 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:10:01,498 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:10:01,498 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 01:10:01,498 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:10:01,498 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 01:10:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 01:10:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 01:10:01,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:01,517 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:01,518 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 01:10:01,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:01,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950555312] [2019-11-20 01:10:01,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:01,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950555312] [2019-11-20 01:10:01,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:10:01,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 01:10:01,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538286337] [2019-11-20 01:10:01,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 01:10:01,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:10:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 01:10:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 01:10:01,651 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 01:10:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:10:01,662 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 01:10:01,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 01:10:01,664 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 01:10:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:10:01,670 INFO L225 Difference]: With dead ends: 29 [2019-11-20 01:10:01,671 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 01:10:01,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 01:10:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 01:10:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 01:10:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 01:10:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 01:10:01,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 01:10:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:10:01,701 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 01:10:01,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 01:10:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 01:10:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 01:10:01,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:01,702 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:01,703 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 01:10:01,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:01,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066744962] [2019-11-20 01:10:01,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:01,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066744962] [2019-11-20 01:10:01,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:10:01,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 01:10:01,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947660160] [2019-11-20 01:10:01,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 01:10:01,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:10:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 01:10:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 01:10:01,765 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-20 01:10:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:10:01,830 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 01:10:01,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 01:10:01,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 01:10:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:10:01,832 INFO L225 Difference]: With dead ends: 23 [2019-11-20 01:10:01,832 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 01:10:01,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 01:10:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 01:10:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 01:10:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 01:10:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 01:10:01,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 01:10:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:10:01,837 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 01:10:01,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 01:10:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 01:10:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 01:10:01,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:01,838 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:01,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:01,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 01:10:01,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:01,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156832245] [2019-11-20 01:10:01,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:10:01,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156832245] [2019-11-20 01:10:01,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:10:01,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 01:10:01,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627418278] [2019-11-20 01:10:01,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:10:01,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:10:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:10:01,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:10:01,920 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-20 01:10:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:10:01,964 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-20 01:10:01,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 01:10:01,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 01:10:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:10:01,965 INFO L225 Difference]: With dead ends: 22 [2019-11-20 01:10:01,965 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 01:10:01,966 INFO L630 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 [2019-11-20 01:10:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 01:10:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-20 01:10:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 01:10:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 01:10:01,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-20 01:10:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:10:01,970 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 01:10:01,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:10:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 01:10:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 01:10:01,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:01,972 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:01,972 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 01:10:01,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:01,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484543163] [2019-11-20 01:10:01,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:02,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484543163] [2019-11-20 01:10:02,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462292307] [2019-11-20 01:10:02,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:10:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:02,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 01:10:02,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:10:02,541 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 01:10:02,541 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:10:02,558 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:10:02,566 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 01:10:02,566 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:10:02,577 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:10:02,578 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:10:02,578 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 01:10:02,622 INFO L377 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 23 treesize of output 22 [2019-11-20 01:10:02,623 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:10:02,639 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:10:02,639 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:10:02,639 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 01:10:02,858 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:10:02,858 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-20 01:10:02,859 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:10:02,895 INFO L567 ElimStorePlain]: treesize reduction 24, result has 69.6 percent of original size [2019-11-20 01:10:02,897 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 01:10:02,897 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-20 01:10:02,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:10:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:02,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:10:02,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-20 01:10:02,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71875117] [2019-11-20 01:10:02,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 01:10:02,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:10:02,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 01:10:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-20 01:10:02,981 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-11-20 01:10:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:10:03,601 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-20 01:10:03,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 01:10:03,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-20 01:10:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:10:03,604 INFO L225 Difference]: With dead ends: 33 [2019-11-20 01:10:03,604 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 01:10:03,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2019-11-20 01:10:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 01:10:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-20 01:10:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 01:10:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-20 01:10:03,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-20 01:10:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:10:03,610 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-20 01:10:03,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 01:10:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-20 01:10:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 01:10:03,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:03,611 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:03,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:10:03,814 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-20 01:10:03,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:03,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470563727] [2019-11-20 01:10:03,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:03,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470563727] [2019-11-20 01:10:03,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716590043] [2019-11-20 01:10:03,916 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:10:03,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 01:10:03,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:10:03,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:10:03,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:10:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:04,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:10:04,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 01:10:04,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430241934] [2019-11-20 01:10:04,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:10:04,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:10:04,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:10:04,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:10:04,023 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-20 01:10:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:10:04,194 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 01:10:04,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 01:10:04,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 01:10:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:10:04,195 INFO L225 Difference]: With dead ends: 31 [2019-11-20 01:10:04,195 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 01:10:04,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-20 01:10:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 01:10:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-20 01:10:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 01:10:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-20 01:10:04,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-20 01:10:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:10:04,200 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-20 01:10:04,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:10:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-20 01:10:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 01:10:04,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:04,201 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:04,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:10:04,402 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-20 01:10:04,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:04,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289045094] [2019-11-20 01:10:04,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:10:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:04,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289045094] [2019-11-20 01:10:04,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133023700] [2019-11-20 01:10:04,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:10:04,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 01:10:04,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 01:10:04,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:10:04,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:10:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:10:04,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:10:04,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 01:10:04,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242385475] [2019-11-20 01:10:04,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:10:04,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 01:10:04,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:10:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:10:04,545 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-20 01:10:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:10:04,649 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-20 01:10:04,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 01:10:04,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 01:10:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:10:04,655 INFO L225 Difference]: With dead ends: 35 [2019-11-20 01:10:04,655 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 01:10:04,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:10:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 01:10:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-20 01:10:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 01:10:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-20 01:10:04,659 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-20 01:10:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:10:04,659 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-20 01:10:04,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:10:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-20 01:10:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 01:10:04,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:10:04,659 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:10:04,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 01:10:04,860 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 01:10:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:10:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-20 01:10:04,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 01:10:04,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677886802] [2019-11-20 01:10:04,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 01:10:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:10:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 01:10:04,911 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 01:10:04,911 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 01:10:04,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 01:10:04 BoogieIcfgContainer [2019-11-20 01:10:04,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 01:10:04,940 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 01:10:04,940 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 01:10:04,941 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 01:10:04,941 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:10:01" (3/4) ... [2019-11-20 01:10:04,942 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 01:10:04,989 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d891dc80-053c-4f5d-9938-6caeb6e39ca2/bin/uautomizer/witness.graphml [2019-11-20 01:10:04,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 01:10:04,991 INFO L168 Benchmark]: Toolchain (without parser) took 4124.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -117.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. [2019-11-20 01:10:04,991 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:10:04,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -183.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 01:10:04,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:10:04,992 INFO L168 Benchmark]: Boogie Preprocessor took 29.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:10:04,993 INFO L168 Benchmark]: RCFGBuilder took 246.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:10:04,993 INFO L168 Benchmark]: TraceAbstraction took 3489.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. [2019-11-20 01:10:04,994 INFO L168 Benchmark]: Witness Printer took 49.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-20 01:10:04,996 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -183.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 246.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3489.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. * Witness Printer took 49.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i