./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/for_bounded_loop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/for_bounded_loop1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/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 1a0e89cb1a2148382c7546df46cfbb79c04a1e70 ................................................................................................................................................................................................................................................................................................................................................. 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 0.1.25-f470102 [2019-12-07 18:33:09,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:33:09,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:33:09,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:33:09,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:33:09,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:33:09,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:33:09,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:33:09,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:33:09,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:33:09,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:33:09,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:33:09,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:33:09,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:33:09,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:33:09,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:33:09,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:33:09,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:33:09,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:33:09,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:33:09,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:33:09,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:33:09,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:33:09,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:33:09,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:33:09,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:33:09,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:33:09,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:33:09,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:33:09,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:33:09,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:33:09,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:33:09,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:33:09,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:33:09,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:33:09,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:33:09,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:33:09,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:33:09,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:33:09,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:33:09,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:33:09,047 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:33:09,057 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:33:09,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:33:09,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:33:09,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:33:09,058 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:33:09,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:33:09,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:33:09,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:33:09,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:33:09,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:33:09,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:33:09,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:33:09,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:33:09,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:33:09,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:33:09,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:33:09,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:33:09,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:33:09,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:33:09,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:33:09,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:33:09,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:33:09,061 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_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/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 -> 1a0e89cb1a2148382c7546df46cfbb79c04a1e70 [2019-12-07 18:33:09,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:33:09,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:33:09,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:33:09,173 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:33:09,173 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:33:09,174 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/../../sv-benchmarks/c/loops/for_bounded_loop1.c [2019-12-07 18:33:09,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/data/88b1b9150/a74603068bd7400bacdd6f540b8e2326/FLAG26c26d883 [2019-12-07 18:33:09,614 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:33:09,615 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/sv-benchmarks/c/loops/for_bounded_loop1.c [2019-12-07 18:33:09,619 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/data/88b1b9150/a74603068bd7400bacdd6f540b8e2326/FLAG26c26d883 [2019-12-07 18:33:09,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/data/88b1b9150/a74603068bd7400bacdd6f540b8e2326 [2019-12-07 18:33:09,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:33:09,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:33:09,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:33:09,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:33:09,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:33:09,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b40e489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09, skipping insertion in model container [2019-12-07 18:33:09,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:33:09,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:33:09,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:33:09,803 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:33:09,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:33:09,826 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:33:09,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09 WrapperNode [2019-12-07 18:33:09,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:33:09,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:33:09,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:33:09,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:33:09,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:33:09,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:33:09,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:33:09,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:33:09,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... [2019-12-07 18:33:09,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:33:09,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:33:09,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:33:09,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:33:09,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/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 [2019-12-07 18:33:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:33:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:33:10,002 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:33:10,003 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-12-07 18:33:10,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:33:10 BoogieIcfgContainer [2019-12-07 18:33:10,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:33:10,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:33:10,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:33:10,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:33:10,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:33:09" (1/3) ... [2019-12-07 18:33:10,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45492d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:33:10, skipping insertion in model container [2019-12-07 18:33:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:33:09" (2/3) ... [2019-12-07 18:33:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45492d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:33:10, skipping insertion in model container [2019-12-07 18:33:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:33:10" (3/3) ... [2019-12-07 18:33:10,008 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-12-07 18:33:10,014 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:33:10,018 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-12-07 18:33:10,025 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 18:33:10,039 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:33:10,039 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:33:10,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:33:10,039 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:33:10,039 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:33:10,039 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:33:10,039 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:33:10,039 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:33:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-12-07 18:33:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 18:33:10,052 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:33:10,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 18:33:10,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:33:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:33:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash 29745418, now seen corresponding path program 1 times [2019-12-07 18:33:10,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:33:10,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603514231] [2019-12-07 18:33:10,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:33:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:33:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:33:10,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603514231] [2019-12-07 18:33:10,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:33:10,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:33:10,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371666184] [2019-12-07 18:33:10,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:33:10,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:33:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:33:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:33:10,186 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-12-07 18:33:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:33:10,240 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-12-07 18:33:10,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:33:10,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 18:33:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:33:10,249 INFO L225 Difference]: With dead ends: 48 [2019-12-07 18:33:10,249 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 18:33:10,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:33:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 18:33:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2019-12-07 18:33:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 18:33:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-12-07 18:33:10,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2019-12-07 18:33:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:33:10,276 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-12-07 18:33:10,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:33:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-12-07 18:33:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 18:33:10,277 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:33:10,277 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 18:33:10,277 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:33:10,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:33:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 922077226, now seen corresponding path program 1 times [2019-12-07 18:33:10,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:33:10,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542684487] [2019-12-07 18:33:10,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:33:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:33:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:33:10,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542684487] [2019-12-07 18:33:10,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:33:10,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:33:10,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21593410] [2019-12-07 18:33:10,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:33:10,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:33:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:33:10,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:33:10,295 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2019-12-07 18:33:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:33:10,306 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-12-07 18:33:10,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:33:10,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 18:33:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:33:10,307 INFO L225 Difference]: With dead ends: 22 [2019-12-07 18:33:10,307 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 18:33:10,308 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 [2019-12-07 18:33:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 18:33:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-12-07 18:33:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 18:33:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-12-07 18:33:10,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 6 [2019-12-07 18:33:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:33:10,311 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-12-07 18:33:10,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:33:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-12-07 18:33:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 18:33:10,311 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:33:10,311 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:33:10,311 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:33:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:33:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1387310901, now seen corresponding path program 1 times [2019-12-07 18:33:10,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:33:10,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987769834] [2019-12-07 18:33:10,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:33:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:33:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:33:10,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987769834] [2019-12-07 18:33:10,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:33:10,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:33:10,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826136738] [2019-12-07 18:33:10,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:33:10,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:33:10,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:33:10,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:33:10,403 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2019-12-07 18:33:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:33:10,458 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-12-07 18:33:10,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:33:10,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-12-07 18:33:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:33:10,459 INFO L225 Difference]: With dead ends: 19 [2019-12-07 18:33:10,460 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 18:33:10,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:33:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 18:33:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2019-12-07 18:33:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 18:33:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-12-07 18:33:10,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2019-12-07 18:33:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:33:10,464 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-12-07 18:33:10,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:33:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-12-07 18:33:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 18:33:10,465 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:33:10,465 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:33:10,465 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:33:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:33:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash 681382811, now seen corresponding path program 1 times [2019-12-07 18:33:10,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:33:10,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20828673] [2019-12-07 18:33:10,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:33:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:33:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:33:10,505 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:33:10,505 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:33:10,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:33:10 BoogieIcfgContainer [2019-12-07 18:33:10,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:33:10,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:33:10,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:33:10,517 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:33:10,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:33:10" (3/4) ... [2019-12-07 18:33:10,519 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 18:33:10,546 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4bd5e2e8-4a92-4338-b91a-a5faa8726d52/bin/uautomizer/witness.graphml [2019-12-07 18:33:10,546 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:33:10,548 INFO L168 Benchmark]: Toolchain (without parser) took 916.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 939.8 MB in the beginning and 1.0 GB in the end (delta: -81.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:33:10,548 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 956.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:33:10,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -158.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:33:10,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:33:10,549 INFO L168 Benchmark]: Boogie Preprocessor took 12.03 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:33:10,550 INFO L168 Benchmark]: RCFGBuilder took 143.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:33:10,550 INFO L168 Benchmark]: TraceAbstraction took 512.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:33:10,551 INFO L168 Benchmark]: Witness Printer took 29.24 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:33:10,553 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 956.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 195.71 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -158.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.03 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 512.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 11.5 GB. * Witness Printer took 29.24 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 [L17] COND TRUE i