./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2iff.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_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/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 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:13:37,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:13:37,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:13:37,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:13:37,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:13:37,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:13:37,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:13:37,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:13:37,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:13:37,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:13:37,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:13:37,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:13:37,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:13:37,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:13:37,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:13:37,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:13:37,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:13:37,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:13:37,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:13:37,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:13:37,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:13:37,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:13:37,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:13:37,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:13:37,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:13:37,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:13:37,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:13:37,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:13:37,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:13:37,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:13:37,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:13:37,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:13:37,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:13:37,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:13:37,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:13:37,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:13:37,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:13:37,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:13:37,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:13:37,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:13:37,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:13:37,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 08:13:37,319 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:13:37,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:13:37,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:13:37,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:13:37,321 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:13:37,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:13:37,321 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:13:37,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:13:37,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:13:37,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:13:37,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 08:13:37,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:13:37,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 08:13:37,323 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:13:37,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 08:13:37,323 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:13:37,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 08:13:37,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:13:37,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:13:37,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:13:37,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:13:37,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:13:37,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:13:37,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:13:37,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 08:13:37,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 08:13:37,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 08:13:37,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 08:13:37,326 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_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/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 -> 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b [2019-11-20 08:13:37,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:13:37,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:13:37,509 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:13:37,511 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:13:37,511 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:13:37,512 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s2iff.c [2019-11-20 08:13:37,593 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/data/0fde67dc3/afd39cc6589e44ec94a89fa67d0af586/FLAG8a67a3808 [2019-11-20 08:13:38,011 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:13:38,012 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/sv-benchmarks/c/array-fpi/s2iff.c [2019-11-20 08:13:38,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/data/0fde67dc3/afd39cc6589e44ec94a89fa67d0af586/FLAG8a67a3808 [2019-11-20 08:13:38,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/data/0fde67dc3/afd39cc6589e44ec94a89fa67d0af586 [2019-11-20 08:13:38,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:13:38,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 08:13:38,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:13:38,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:13:38,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:13:38,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bc7e010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38, skipping insertion in model container [2019-11-20 08:13:38,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,391 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:13:38,410 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:13:38,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:13:38,756 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:13:38,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:13:38,800 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:13:38,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38 WrapperNode [2019-11-20 08:13:38,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:13:38,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 08:13:38,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 08:13:38,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 08:13:38,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 08:13:38,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:13:38,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:13:38,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:13:38,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... [2019-11-20 08:13:38,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:13:38,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:13:38,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:13:38,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:13:38,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/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 08:13:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 08:13:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 08:13:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:13:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:13:38,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:13:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 08:13:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:13:39,196 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:13:39,197 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-20 08:13:39,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:13:39 BoogieIcfgContainer [2019-11-20 08:13:39,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:13:39,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:13:39,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:13:39,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:13:39,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:13:38" (1/3) ... [2019-11-20 08:13:39,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f27e82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:13:39, skipping insertion in model container [2019-11-20 08:13:39,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:13:38" (2/3) ... [2019-11-20 08:13:39,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f27e82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:13:39, skipping insertion in model container [2019-11-20 08:13:39,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:13:39" (3/3) ... [2019-11-20 08:13:39,207 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2019-11-20 08:13:39,217 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:13:39,225 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 08:13:39,237 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 08:13:39,263 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:13:39,264 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 08:13:39,264 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:13:39,264 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:13:39,264 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:13:39,264 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:13:39,265 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:13:39,265 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:13:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-20 08:13:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:13:39,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:39,288 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:39,289 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-20 08:13:39,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:39,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369829493] [2019-11-20 08:13:39,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:39,454 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 08:13:39,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369829493] [2019-11-20 08:13:39,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:13:39,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 08:13:39,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680810203] [2019-11-20 08:13:39,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 08:13:39,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:13:39,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 08:13:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 08:13:39,477 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-20 08:13:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:13:39,493 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-20 08:13:39,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 08:13:39,495 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-20 08:13:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:13:39,503 INFO L225 Difference]: With dead ends: 29 [2019-11-20 08:13:39,503 INFO L226 Difference]: Without dead ends: 13 [2019-11-20 08:13:39,506 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 08:13:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-20 08:13:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-20 08:13:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 08:13:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-20 08:13:39,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-20 08:13:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:13:39,537 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-20 08:13:39,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 08:13:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-20 08:13:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:13:39,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:39,538 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:39,539 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:39,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-20 08:13:39,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:39,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5080466] [2019-11-20 08:13:39,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:39,616 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 08:13:39,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5080466] [2019-11-20 08:13:39,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:13:39,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 08:13:39,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926036109] [2019-11-20 08:13:39,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:13:39,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:13:39,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:13:39,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:13:39,620 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-20 08:13:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:13:39,679 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-20 08:13:39,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:13:39,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-20 08:13:39,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:13:39,681 INFO L225 Difference]: With dead ends: 23 [2019-11-20 08:13:39,681 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 08:13:39,682 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 08:13:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 08:13:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-20 08:13:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 08:13:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-20 08:13:39,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-20 08:13:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:13:39,687 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-20 08:13:39,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:13:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-20 08:13:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 08:13:39,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:39,688 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:39,688 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-20 08:13:39,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:39,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933314832] [2019-11-20 08:13:39,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:39,773 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 08:13:39,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933314832] [2019-11-20 08:13:39,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:13:39,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 08:13:39,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820716401] [2019-11-20 08:13:39,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:13:39,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:13:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:13:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:13:39,775 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-20 08:13:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:13:39,838 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-20 08:13:39,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:13:39,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 08:13:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:13:39,840 INFO L225 Difference]: With dead ends: 22 [2019-11-20 08:13:39,840 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 08:13:39,841 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 08:13:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 08:13:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-20 08:13:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 08:13:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 08:13:39,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-20 08:13:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:13:39,846 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 08:13:39,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:13:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 08:13:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:13:39,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:39,848 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:39,848 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-20 08:13:39,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:39,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751704513] [2019-11-20 08:13:39,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:40,440 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 08:13:40,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751704513] [2019-11-20 08:13:40,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958523062] [2019-11-20 08:13:40,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/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 08:13:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:40,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 08:13:40,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:13:40,613 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 08:13:40,615 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:13:40,634 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:13:40,644 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 08:13:40,644 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:13:40,658 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:13:40,659 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 08:13:40,659 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 08:13:40,715 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 08:13:40,716 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:13:40,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:13:40,741 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:13:40,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 08:13:41,050 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:13:41,050 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 08:13:41,052 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:13:41,101 INFO L567 ElimStorePlain]: treesize reduction 32, result has 63.2 percent of original size [2019-11-20 08:13:41,102 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 08:13:41,103 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-20 08:13:41,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:13:41,253 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 08:13:41,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:13:41,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-20 08:13:41,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441129243] [2019-11-20 08:13:41,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 08:13:41,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:13:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 08:13:41,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-20 08:13:41,256 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-11-20 08:13:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:13:42,153 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-20 08:13:42,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 08:13:42,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-20 08:13:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:13:42,159 INFO L225 Difference]: With dead ends: 33 [2019-11-20 08:13:42,159 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 08:13:42,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2019-11-20 08:13:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 08:13:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-20 08:13:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 08:13:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-20 08:13:42,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-20 08:13:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:13:42,168 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-20 08:13:42,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 08:13:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-20 08:13:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 08:13:42,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:42,170 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:42,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:13:42,375 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-20 08:13:42,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:42,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119043907] [2019-11-20 08:13:42,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:42,459 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 08:13:42,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119043907] [2019-11-20 08:13:42,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924259734] [2019-11-20 08:13:42,460 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/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 08:13:42,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 08:13:42,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:13:42,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:13:42,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:13:42,601 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 08:13:42,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:13:42,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 08:13:42,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472430502] [2019-11-20 08:13:42,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:13:42,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:13:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:13:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:13:42,619 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-20 08:13:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:13:42,802 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-20 08:13:42,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 08:13:42,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-20 08:13:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:13:42,804 INFO L225 Difference]: With dead ends: 31 [2019-11-20 08:13:42,804 INFO L226 Difference]: Without dead ends: 27 [2019-11-20 08:13:42,805 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 08:13:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-20 08:13:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-20 08:13:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 08:13:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-20 08:13:42,811 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-20 08:13:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:13:42,812 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-20 08:13:42,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:13:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-20 08:13:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 08:13:42,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:42,813 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:43,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:13:43,018 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-20 08:13:43,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:43,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860061728] [2019-11-20 08:13:43,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:13:43,084 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 08:13:43,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860061728] [2019-11-20 08:13:43,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54563346] [2019-11-20 08:13:43,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/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 08:13:43,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 08:13:43,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:13:43,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:13:43,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:13:43,169 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 08:13:43,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:13:43,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 08:13:43,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343955891] [2019-11-20 08:13:43,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:13:43,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:13:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:13:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:13:43,171 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-20 08:13:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:13:43,287 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-20 08:13:43,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 08:13:43,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 08:13:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:13:43,289 INFO L225 Difference]: With dead ends: 35 [2019-11-20 08:13:43,290 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 08:13:43,290 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 08:13:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 08:13:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-20 08:13:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 08:13:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-20 08:13:43,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-20 08:13:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:13:43,295 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-20 08:13:43,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:13:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-20 08:13:43,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 08:13:43,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:13:43,296 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:13:43,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:13:43,499 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:13:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:13:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-20 08:13:43,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:13:43,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714490973] [2019-11-20 08:13:43,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:13:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:13:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:13:43,602 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 08:13:43,602 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 08:13:43,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:13:43 BoogieIcfgContainer [2019-11-20 08:13:43,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 08:13:43,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 08:13:43,666 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 08:13:43,667 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 08:13:43,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:13:39" (3/4) ... [2019-11-20 08:13:43,670 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 08:13:43,755 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_372efdfb-f9b0-4e9f-a73e-ea0893d593f3/bin/uautomizer/witness.graphml [2019-11-20 08:13:43,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 08:13:43,759 INFO L168 Benchmark]: Toolchain (without parser) took 5385.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -100.7 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:13:43,763 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:13:43,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 08:13:43,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.88 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 08:13:43,764 INFO L168 Benchmark]: Boogie Preprocessor took 28.40 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 08:13:43,764 INFO L168 Benchmark]: RCFGBuilder took 327.21 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-20 08:13:43,765 INFO L168 Benchmark]: TraceAbstraction took 4465.69 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: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 11.5 GB. [2019-11-20 08:13:43,765 INFO L168 Benchmark]: Witness Printer took 89.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-20 08:13:43,767 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 428.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.88 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 28.40 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 327.21 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4465.69 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: 40.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 11.5 GB. * Witness Printer took 89.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i