./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/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 2c6480746379e4e7ce6d546f9a1318408c455414 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-cad4683 [2019-11-15 23:35:00,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:35:00,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:35:00,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:35:00,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:35:00,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:35:00,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:35:00,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:35:00,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:35:00,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:35:00,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:35:00,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:35:00,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:35:00,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:35:00,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:35:00,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:35:00,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:35:00,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:35:00,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:35:00,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:35:00,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:35:00,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:35:00,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:35:00,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:35:00,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:35:00,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:35:00,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:35:00,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:35:00,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:35:00,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:35:00,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:35:00,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:35:00,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:35:00,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:35:00,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:35:00,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:35:00,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:35:00,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:35:00,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:35:00,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:35:00,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:35:00,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:35:00,694 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:35:00,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:35:00,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:35:00,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:35:00,705 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:35:00,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:35:00,706 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:35:00,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:35:00,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:35:00,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:35:00,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:35:00,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:35:00,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:35:00,707 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:35:00,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:35:00,709 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:35:00,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:35:00,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:35:00,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:35:00,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:35:00,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:35:00,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:35:00,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:35:00,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:35:00,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:35:00,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:35:00,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:35:00,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:35:00,712 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_9a06696d-3204-4e3a-9817-d5e232369a9e/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 -> 2c6480746379e4e7ce6d546f9a1318408c455414 [2019-11-15 23:35:00,744 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:35:00,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:35:00,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:35:00,763 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:35:00,764 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:35:00,765 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/../../sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-15 23:35:00,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/data/0bfc223c2/cc44499782c9485599f3776fb8faf3e0/FLAG854ea4d07 [2019-11-15 23:35:01,226 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:35:01,226 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-15 23:35:01,232 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/data/0bfc223c2/cc44499782c9485599f3776fb8faf3e0/FLAG854ea4d07 [2019-11-15 23:35:01,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/data/0bfc223c2/cc44499782c9485599f3776fb8faf3e0 [2019-11-15 23:35:01,643 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:35:01,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:35:01,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:35:01,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:35:01,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:35:01,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:01,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d9e132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01, skipping insertion in model container [2019-11-15 23:35:01,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:01,660 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:35:01,676 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:35:01,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:35:01,940 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:35:01,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:35:01,986 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:35:01,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01 WrapperNode [2019-11-15 23:35:01,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:35:01,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:35:01,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:35:01,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:35:01,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:35:02,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:35:02,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:35:02,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:35:02,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... [2019-11-15 23:35:02,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:35:02,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:35:02,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:35:02,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:35:02,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/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 [2019-11-15 23:35:02,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 23:35:02,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 23:35:02,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:35:02,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:35:02,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 23:35:02,316 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:35:02,317 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-15 23:35:02,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:35:02 BoogieIcfgContainer [2019-11-15 23:35:02,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:35:02,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:35:02,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:35:02,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:35:02,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:35:01" (1/3) ... [2019-11-15 23:35:02,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4328a725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:35:02, skipping insertion in model container [2019-11-15 23:35:02,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:35:01" (2/3) ... [2019-11-15 23:35:02,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4328a725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:35:02, skipping insertion in model container [2019-11-15 23:35:02,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:35:02" (3/3) ... [2019-11-15 23:35:02,324 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2019-11-15 23:35:02,331 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:35:02,337 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:35:02,346 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:35:02,366 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:35:02,366 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:35:02,367 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:35:02,367 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:35:02,367 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:35:02,367 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:35:02,367 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:35:02,367 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:35:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-15 23:35:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:35:02,386 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:02,386 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:02,388 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-15 23:35:02,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:02,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808820112] [2019-11-15 23:35:02,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:02,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:02,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:35:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:02,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808820112] [2019-11-15 23:35:02,521 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:35:02,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:35:02,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817408834] [2019-11-15 23:35:02,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:35:02,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:02,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:35:02,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:35:02,537 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-15 23:35:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:02,550 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-15 23:35:02,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:35:02,552 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 23:35:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:02,559 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:35:02,559 INFO L226 Difference]: Without dead ends: 15 [2019-11-15 23:35:02,561 INFO L600 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 [2019-11-15 23:35:02,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-15 23:35:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-15 23:35:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-15 23:35:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-15 23:35:02,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-15 23:35:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:02,587 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-15 23:35:02,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:35:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-15 23:35:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:35:02,588 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:02,588 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:02,588 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-15 23:35:02,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:02,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359968675] [2019-11-15 23:35:02,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:02,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:02,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:02,608 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:02,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393024074] [2019-11-15 23:35:02,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/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 [2019-11-15 23:35:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:35:02,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 23:35:02,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:02,761 INFO L341 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2019-11-15 23:35:02,762 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2019-11-15 23:35:02,762 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:02,773 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:02,774 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 23:35:02,774 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2019-11-15 23:35:02,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:02,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359968675] [2019-11-15 23:35:02,832 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:02,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393024074] [2019-11-15 23:35:02,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:35:02,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:35:02,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923237355] [2019-11-15 23:35:02,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:35:02,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:35:02,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:35:02,835 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-15 23:35:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:02,924 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-15 23:35:02,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:35:02,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-15 23:35:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:02,926 INFO L225 Difference]: With dead ends: 32 [2019-11-15 23:35:02,926 INFO L226 Difference]: Without dead ends: 30 [2019-11-15 23:35:02,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:35:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-15 23:35:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-15 23:35:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-15 23:35:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-15 23:35:02,932 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2019-11-15 23:35:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:02,932 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-15 23:35:02,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:35:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-15 23:35:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:35:02,933 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:02,934 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:03,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:03,137 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash 130601367, now seen corresponding path program 1 times [2019-11-15 23:35:03,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:03,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770604035] [2019-11-15 23:35:03,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:03,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:03,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:03,156 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:03,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147078568] [2019-11-15 23:35:03,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/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 [2019-11-15 23:35:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:35:03,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:35:03,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:03,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770604035] [2019-11-15 23:35:03,224 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:03,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147078568] [2019-11-15 23:35:03,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:35:03,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:35:03,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022615173] [2019-11-15 23:35:03,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:35:03,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:35:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:35:03,226 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-15 23:35:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:03,318 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-15 23:35:03,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:35:03,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-15 23:35:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:03,319 INFO L225 Difference]: With dead ends: 47 [2019-11-15 23:35:03,319 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 23:35:03,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:35:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 23:35:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-15 23:35:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-15 23:35:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-15 23:35:03,324 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-15 23:35:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:03,324 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-15 23:35:03,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:35:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-15 23:35:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:35:03,325 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:03,325 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:03,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:03,526 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-11-15 23:35:03,527 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:03,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705222595] [2019-11-15 23:35:03,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:03,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:03,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:03,550 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:03,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233256047] [2019-11-15 23:35:03,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/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 [2019-11-15 23:35:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:35:03,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:35:03,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:03,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705222595] [2019-11-15 23:35:03,626 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:03,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233256047] [2019-11-15 23:35:03,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:35:03,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-15 23:35:03,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020030631] [2019-11-15 23:35:03,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:35:03,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:35:03,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:35:03,628 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-15 23:35:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:03,716 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-15 23:35:03,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:35:03,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-15 23:35:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:03,718 INFO L225 Difference]: With dead ends: 42 [2019-11-15 23:35:03,718 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 23:35:03,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:35:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 23:35:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-15 23:35:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 23:35:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-15 23:35:03,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-15 23:35:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:03,723 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-15 23:35:03,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:35:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-15 23:35:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 23:35:03,724 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:03,724 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:03,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:03,931 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash 437833903, now seen corresponding path program 1 times [2019-11-15 23:35:03,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:03,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904756196] [2019-11-15 23:35:03,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:03,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:03,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:03,944 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:03,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575597532] [2019-11-15 23:35:03,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:35:03,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 23:35:03,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:04,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904756196] [2019-11-15 23:35:04,026 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:04,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575597532] [2019-11-15 23:35:04,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:35:04,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 23:35:04,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940308644] [2019-11-15 23:35:04,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:35:04,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:35:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:35:04,028 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-15 23:35:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:04,105 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-15 23:35:04,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:35:04,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-15 23:35:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:04,106 INFO L225 Difference]: With dead ends: 39 [2019-11-15 23:35:04,106 INFO L226 Difference]: Without dead ends: 25 [2019-11-15 23:35:04,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:35:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-15 23:35:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-11-15 23:35:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 23:35:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-15 23:35:04,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-15 23:35:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:04,110 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-15 23:35:04,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:35:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-15 23:35:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 23:35:04,111 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:04,111 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:04,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:04,312 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:04,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-11-15 23:35:04,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:04,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130823791] [2019-11-15 23:35:04,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:04,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:04,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:04,330 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:04,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68566436] [2019-11-15 23:35:04,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:35:04,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 23:35:04,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:04,392 INFO L375 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 [2019-11-15 23:35:04,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:04,400 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:04,411 INFO L375 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 27 treesize of output 15 [2019-11-15 23:35:04,411 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:04,418 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:04,419 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:35:04,419 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2019-11-15 23:35:04,492 INFO L341 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-15 23:35:04,493 INFO L375 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 3 case distinctions, treesize of input 41 treesize of output 72 [2019-11-15 23:35:04,494 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:04,528 INFO L567 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2019-11-15 23:35:04,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,530 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 23:35:04,531 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2019-11-15 23:35:04,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,651 INFO L392 ElimStorePlain]: Different costs {12=[|v_#memory_int_12|], 20=[v_prenex_4]} [2019-11-15 23:35:04,658 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:35:04,660 INFO L341 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-15 23:35:04,661 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2019-11-15 23:35:04,662 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:04,702 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:35:04,708 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:35:04,739 INFO L341 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-15 23:35:04,740 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 89 [2019-11-15 23:35:04,741 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 23:35:04,826 INFO L567 ElimStorePlain]: treesize reduction 51, result has 69.3 percent of original size [2019-11-15 23:35:04,827 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-11-15 23:35:04,828 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2019-11-15 23:35:04,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:35:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:04,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130823791] [2019-11-15 23:35:04,952 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:04,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68566436] [2019-11-15 23:35:04,952 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:35:04,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-15 23:35:04,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661491876] [2019-11-15 23:35:04,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:35:04,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:35:04,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:35:04,954 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-11-15 23:35:05,184 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2019-11-15 23:35:05,465 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2019-11-15 23:35:05,676 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2019-11-15 23:35:05,920 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-11-15 23:35:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:05,983 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-15 23:35:05,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:35:05,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-15 23:35:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:05,986 INFO L225 Difference]: With dead ends: 42 [2019-11-15 23:35:05,986 INFO L226 Difference]: Without dead ends: 40 [2019-11-15 23:35:05,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:35:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-15 23:35:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2019-11-15 23:35:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:35:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-15 23:35:05,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2019-11-15 23:35:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:05,993 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-15 23:35:05,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:35:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-15 23:35:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 23:35:05,994 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:05,994 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:06,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:06,197 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash -602215277, now seen corresponding path program 2 times [2019-11-15 23:35:06,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:06,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131773984] [2019-11-15 23:35:06,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:06,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:06,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:06,222 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:06,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387335662] [2019-11-15 23:35:06,227 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:06,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:35:06,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:35:06,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:35:06,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:06,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131773984] [2019-11-15 23:35:06,297 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:06,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387335662] [2019-11-15 23:35:06,297 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:35:06,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-15 23:35:06,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979660075] [2019-11-15 23:35:06,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:35:06,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:06,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:35:06,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:35:06,298 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-15 23:35:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:06,429 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-15 23:35:06,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:35:06,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-15 23:35:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:06,432 INFO L225 Difference]: With dead ends: 59 [2019-11-15 23:35:06,432 INFO L226 Difference]: Without dead ends: 50 [2019-11-15 23:35:06,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:35:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-15 23:35:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2019-11-15 23:35:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:35:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-15 23:35:06,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2019-11-15 23:35:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:06,440 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-15 23:35:06,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:35:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-15 23:35:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 23:35:06,441 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:06,441 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:06,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:06,644 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash -508830509, now seen corresponding path program 3 times [2019-11-15 23:35:06,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:06,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177305144] [2019-11-15 23:35:06,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:06,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:06,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:06,658 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:06,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439800763] [2019-11-15 23:35:06,660 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:06,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 23:35:06,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:35:06,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:35:06,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:35:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:35:06,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177305144] [2019-11-15 23:35:06,752 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-15 23:35:06,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439800763] [2019-11-15 23:35:06,752 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:35:06,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-15 23:35:06,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468808204] [2019-11-15 23:35:06,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:35:06,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:35:06,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:35:06,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:35:06,753 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-15 23:35:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:35:06,860 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-15 23:35:06,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:35:06,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-15 23:35:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:35:06,861 INFO L225 Difference]: With dead ends: 54 [2019-11-15 23:35:06,861 INFO L226 Difference]: Without dead ends: 47 [2019-11-15 23:35:06,861 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:35:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-15 23:35:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-15 23:35:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 23:35:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-15 23:35:06,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-11-15 23:35:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:35:06,868 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-15 23:35:06,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:35:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-15 23:35:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 23:35:06,868 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:35:06,868 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:35:07,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:07,069 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:35:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:35:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 575675563, now seen corresponding path program 1 times [2019-11-15 23:35:07,070 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:35:07,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898343316] [2019-11-15 23:35:07,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:07,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:35:07,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:35:07,080 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-15 23:35:07,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704698017] [2019-11-15 23:35:07,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:35:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:35:07,151 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:35:07,151 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:35:07,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:35:07,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:35:07 BoogieIcfgContainer [2019-11-15 23:35:07,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:35:07,381 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:35:07,381 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:35:07,381 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:35:07,382 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:35:02" (3/4) ... [2019-11-15 23:35:07,384 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 23:35:07,451 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9a06696d-3204-4e3a-9817-d5e232369a9e/bin/uautomizer/witness.graphml [2019-11-15 23:35:07,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:35:07,456 INFO L168 Benchmark]: Toolchain (without parser) took 5811.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -103.8 MB). Peak memory consumption was 79.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:35:07,458 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:35:07,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -227.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-15 23:35:07,458 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:35:07,459 INFO L168 Benchmark]: Boogie Preprocessor took 23.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:35:07,459 INFO L168 Benchmark]: RCFGBuilder took 275.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:35:07,459 INFO L168 Benchmark]: TraceAbstraction took 5062.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Peak memory consumption was 99.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:35:07,460 INFO L168 Benchmark]: Witness Printer took 73.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:35:07,462 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 342.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -227.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 275.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5062.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Peak memory consumption was 99.1 MB. Max. memory is 11.5 GB. * Witness Printer took 73.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 1 [L27] b[0] = 1 [L28] i=1 VAL [N=2] [L28] COND TRUE i