./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bbcd29b379466a58e055ac550736cd77ce56d9c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:39:33,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:39:33,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:39:33,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:39:33,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:39:33,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:39:33,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:39:33,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:39:33,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:39:33,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:39:33,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:39:33,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:39:33,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:39:33,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:39:33,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:39:33,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:39:33,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:39:33,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:39:33,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:39:33,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:39:33,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:39:33,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:39:33,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:39:33,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:39:33,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:39:33,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:39:33,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:39:33,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:39:33,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:39:33,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:39:33,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:39:33,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:39:33,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:39:33,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:39:33,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:39:33,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:39:33,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:39:33,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:39:33,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:39:33,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:39:33,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:39:33,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:39:33,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:39:33,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:39:33,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:39:33,209 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:39:33,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:39:33,210 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:39:33,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:39:33,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:39:33,211 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:39:33,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:39:33,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:39:33,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:39:33,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:39:33,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:39:33,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:39:33,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:39:33,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:39:33,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:39:33,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:39:33,214 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2020-12-09 19:39:33,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:39:33,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:39:33,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:39:33,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:39:33,414 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:39:33,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-12-09 19:39:33,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/data/c3e8567d5/739016461eed4b69ad32ddbb9d8de3db/FLAG2c52324cc [2020-12-09 19:39:33,809 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:39:33,809 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-12-09 19:39:33,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/data/c3e8567d5/739016461eed4b69ad32ddbb9d8de3db/FLAG2c52324cc [2020-12-09 19:39:33,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/data/c3e8567d5/739016461eed4b69ad32ddbb9d8de3db [2020-12-09 19:39:33,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:39:33,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:39:33,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:39:33,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:39:33,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:39:33,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:33,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115d37ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33, skipping insertion in model container [2020-12-09 19:39:33,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:33,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:39:33,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:39:33,957 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2020-12-09 19:39:33,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:39:33,964 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:39:33,983 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2020-12-09 19:39:33,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:39:33,997 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:39:33,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33 WrapperNode [2020-12-09 19:39:33,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:39:33,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:39:33,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:39:33,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:39:34,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:39:34,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:39:34,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:39:34,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:39:34,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... [2020-12-09 19:39:34,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:39:34,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:39:34,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:39:34,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:39:34,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:39:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:39:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:39:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 19:39:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:39:34,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:39:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 19:39:34,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 19:39:34,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:39:34,581 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 19:39:34,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:39:34 BoogieIcfgContainer [2020-12-09 19:39:34,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:39:34,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:39:34,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:39:34,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:39:34,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:39:33" (1/3) ... [2020-12-09 19:39:34,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afd9097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:39:34, skipping insertion in model container [2020-12-09 19:39:34,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:39:33" (2/3) ... [2020-12-09 19:39:34,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afd9097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:39:34, skipping insertion in model container [2020-12-09 19:39:34,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:39:34" (3/3) ... [2020-12-09 19:39:34,591 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-12-09 19:39:34,603 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:39:34,606 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:39:34,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 19:39:34,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:39:34,631 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:39:34,631 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:39:34,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:39:34,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:39:34,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:39:34,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:39:34,632 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:39:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 19:39:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 19:39:34,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:34,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:34,645 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -964703457, now seen corresponding path program 1 times [2020-12-09 19:39:34,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:34,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301205639] [2020-12-09 19:39:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:39:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:39:34,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301205639] [2020-12-09 19:39:34,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:39:34,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:39:34,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653575192] [2020-12-09 19:39:34,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:39:34,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:39:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:39:34,786 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-09 19:39:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:34,802 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2020-12-09 19:39:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:39:34,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 19:39:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:34,809 INFO L225 Difference]: With dead ends: 21 [2020-12-09 19:39:34,809 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 19:39:34,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:39:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 19:39:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 19:39:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 19:39:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2020-12-09 19:39:34,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2020-12-09 19:39:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:34,833 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2020-12-09 19:39:34,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:39:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2020-12-09 19:39:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 19:39:34,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:34,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:34,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:39:34,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2050331539, now seen corresponding path program 1 times [2020-12-09 19:39:34,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:34,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416466761] [2020-12-09 19:39:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:34,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:34,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064962138] [2020-12-09 19:39:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:39:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 19:39:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:39:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 19:39:34,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:39:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 19:39:34,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416466761] [2020-12-09 19:39:34,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:34,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064962138] [2020-12-09 19:39:34,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:39:34,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 19:39:34,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264554987] [2020-12-09 19:39:34,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:39:34,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:39:34,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:39:34,939 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2020-12-09 19:39:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:34,972 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2020-12-09 19:39:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:39:34,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 19:39:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:34,973 INFO L225 Difference]: With dead ends: 22 [2020-12-09 19:39:34,973 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 19:39:34,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:39:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 19:39:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 19:39:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 19:39:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-09 19:39:34,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2020-12-09 19:39:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:34,977 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-09 19:39:34,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:39:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-09 19:39:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 19:39:34,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:34,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:35,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 19:39:35,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:35,180 INFO L82 PathProgramCache]: Analyzing trace with hash -939408813, now seen corresponding path program 1 times [2020-12-09 19:39:35,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:35,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144665017] [2020-12-09 19:39:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:35,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:35,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398583561] [2020-12-09 19:39:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:39:35,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 19:39:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:39:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 19:39:35,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:39:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 19:39:35,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144665017] [2020-12-09 19:39:35,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:35,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398583561] [2020-12-09 19:39:35,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:39:35,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 19:39:35,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937681166] [2020-12-09 19:39:35,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:39:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:39:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:39:35,332 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2020-12-09 19:39:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:35,345 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-12-09 19:39:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:39:35,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 19:39:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:35,346 INFO L225 Difference]: With dead ends: 24 [2020-12-09 19:39:35,346 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 19:39:35,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:39:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 19:39:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 19:39:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 19:39:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-09 19:39:35,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2020-12-09 19:39:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:35,351 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-09 19:39:35,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:39:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-09 19:39:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 19:39:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:35,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:35,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:35,553 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1226876461, now seen corresponding path program 1 times [2020-12-09 19:39:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:35,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554415506] [2020-12-09 19:39:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:35,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:35,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610950573] [2020-12-09 19:39:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:39:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 19:39:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:39:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 19:39:35,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:39:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 19:39:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554415506] [2020-12-09 19:39:35,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610950573] [2020-12-09 19:39:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498068065] [2020-12-09 19:39:35,734 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 19:39:35,734 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:39:35,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:39:35,742 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:39:35,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:39:37,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:37,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:37,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:37,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:37,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:38,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:38,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:38,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:38,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:38,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:38,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:40,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:40,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:41,533 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:39:41,848 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 19:39:41,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:41,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:39:41,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-12-09 19:39:41,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251265234] [2020-12-09 19:39:41,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:39:41,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:39:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 19:39:41,999 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-12-09 19:39:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:42,012 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-12-09 19:39:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:39:42,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-09 19:39:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:42,014 INFO L225 Difference]: With dead ends: 36 [2020-12-09 19:39:42,014 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 19:39:42,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 19:39:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 19:39:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 19:39:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 19:39:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 19:39:42,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2020-12-09 19:39:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:42,018 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 19:39:42,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:39:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 19:39:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 19:39:42,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:42,019 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:42,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:42,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:42,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:42,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2012560801, now seen corresponding path program 2 times [2020-12-09 19:39:42,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:42,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542846387] [2020-12-09 19:39:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:42,259 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:42,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325058896] [2020-12-09 19:39:42,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:42,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 19:39:42,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 19:39:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 19:39:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:39:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 19:39:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:39:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 19:39:42,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542846387] [2020-12-09 19:39:42,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:42,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325058896] [2020-12-09 19:39:42,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050191293] [2020-12-09 19:39:42,386 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 19:39:42,386 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:39:42,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:39:42,387 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:39:42,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:39:43,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:43,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:43,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:43,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:43,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:43,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:44,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:46,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:46,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:46,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:46,785 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:39:47,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:47,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:39:47,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-09 19:39:47,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283913980] [2020-12-09 19:39:47,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 19:39:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 19:39:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:39:47,179 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-12-09 19:39:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:47,232 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2020-12-09 19:39:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:39:47,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-09 19:39:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:47,233 INFO L225 Difference]: With dead ends: 42 [2020-12-09 19:39:47,233 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 19:39:47,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:39:47,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 19:39:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-09 19:39:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 19:39:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-09 19:39:47,236 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-12-09 19:39:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:47,237 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-09 19:39:47,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 19:39:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-09 19:39:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 19:39:47,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:47,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:47,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:47,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash -827205591, now seen corresponding path program 3 times [2020-12-09 19:39:47,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:47,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32496017] [2020-12-09 19:39:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:47,481 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:47,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541435565] [2020-12-09 19:39:47,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:47,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 19:39:47,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 19:39:47,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 19:39:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:39:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-09 19:39:47,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:39:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-09 19:39:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32496017] [2020-12-09 19:39:47,591 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541435565] [2020-12-09 19:39:47,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306044357] [2020-12-09 19:39:47,593 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 19:39:47,593 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:39:47,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:39:47,593 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:39:47,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:39:48,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:48,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:48,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:48,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:49,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:50,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:50,223 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:39:50,510 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 19:39:50,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:50,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:39:50,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-09 19:39:50,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797185522] [2020-12-09 19:39:50,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:39:50,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:50,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:39:50,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 19:39:50,661 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-09 19:39:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:50,677 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-09 19:39:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:39:50,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-09 19:39:50,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:50,678 INFO L225 Difference]: With dead ends: 41 [2020-12-09 19:39:50,678 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 19:39:50,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 19:39:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 19:39:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 19:39:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 19:39:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-09 19:39:50,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2020-12-09 19:39:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:50,681 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-09 19:39:50,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:39:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-09 19:39:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 19:39:50,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:50,682 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:50,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:50,884 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1657942295, now seen corresponding path program 4 times [2020-12-09 19:39:50,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:50,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803521573] [2020-12-09 19:39:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:50,922 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:50,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48432023] [2020-12-09 19:39:50,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/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 [2020-12-09 19:39:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:39:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 19:39:50,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:39:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-09 19:39:51,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:39:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-09 19:39:51,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803521573] [2020-12-09 19:39:51,033 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:51,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48432023] [2020-12-09 19:39:51,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083858813] [2020-12-09 19:39:51,034 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 19:39:51,034 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:39:51,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:39:51,035 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:39:51,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:39:51,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:51,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 19:39:52,783 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:39:53,076 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 19:39:53,216 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:39:53,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:39:53,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-09 19:39:53,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983068782] [2020-12-09 19:39:53,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 19:39:53,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:39:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 19:39:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:39:53,217 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2020-12-09 19:39:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:39:53,229 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-12-09 19:39:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:39:53,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-09 19:39:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:39:53,230 INFO L225 Difference]: With dead ends: 59 [2020-12-09 19:39:53,230 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 19:39:53,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:39:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 19:39:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 19:39:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 19:39:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-09 19:39:53,233 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 31 [2020-12-09 19:39:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:39:53,234 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-09 19:39:53,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 19:39:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-09 19:39:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 19:39:53,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:39:53,234 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:39:53,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:39:53,436 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:39:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:39:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash -164903947, now seen corresponding path program 5 times [2020-12-09 19:39:53,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:39:53,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889507450] [2020-12-09 19:39:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:39:53,464 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 19:39:53,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902730309] [2020-12-09 19:39:53,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/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 [2020-12-09 19:39:53,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 19:39:53,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-09 19:39:53,760 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:39:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:39:54,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:39:54,271 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 19:39:54,271 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:39:54,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-12-09 19:39:54,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:39:54 BoogieIcfgContainer [2020-12-09 19:39:54,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:39:54,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:39:54,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:39:54,512 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:39:54,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:39:34" (3/4) ... [2020-12-09 19:39:54,513 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 19:39:54,550 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a5d3cd1b-0d34-4c2c-a1da-b918a322e7a3/bin/utaipan/witness.graphml [2020-12-09 19:39:54,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:39:54,551 INFO L168 Benchmark]: Toolchain (without parser) took 20723.51 ms. Allocated memory was 88.1 MB in the beginning and 201.3 MB in the end (delta: 113.2 MB). Free memory was 48.0 MB in the beginning and 131.4 MB in the end (delta: -83.4 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:39:54,551 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 88.1 MB. Free memory is still 64.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:39:54,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.70 ms. Allocated memory is still 88.1 MB. Free memory was 47.7 MB in the beginning and 59.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:39:54,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.41 ms. Allocated memory is still 88.1 MB. Free memory was 59.7 MB in the beginning and 57.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:39:54,552 INFO L168 Benchmark]: Boogie Preprocessor took 27.81 ms. Allocated memory is still 88.1 MB. Free memory was 57.9 MB in the beginning and 56.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:39:54,552 INFO L168 Benchmark]: RCFGBuilder took 518.80 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.2 MB in the beginning and 89.4 MB in the end (delta: -33.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:39:54,552 INFO L168 Benchmark]: TraceAbstraction took 19926.28 ms. Allocated memory was 115.3 MB in the beginning and 201.3 MB in the end (delta: 86.0 MB). Free memory was 89.4 MB in the beginning and 136.6 MB in the end (delta: -47.2 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:39:54,553 INFO L168 Benchmark]: Witness Printer took 38.91 ms. Allocated memory is still 201.3 MB. Free memory was 136.6 MB in the beginning and 131.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:39:54,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 88.1 MB. Free memory is still 64.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 168.70 ms. Allocated memory is still 88.1 MB. Free memory was 47.7 MB in the beginning and 59.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.41 ms. Allocated memory is still 88.1 MB. Free memory was 59.7 MB in the beginning and 57.9 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.81 ms. Allocated memory is still 88.1 MB. Free memory was 57.9 MB in the beginning and 56.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 518.80 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 56.2 MB in the beginning and 89.4 MB in the end (delta: -33.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19926.28 ms. Allocated memory was 115.3 MB in the beginning and 201.3 MB in the end (delta: 86.0 MB). Free memory was 89.4 MB in the beginning and 136.6 MB in the end (delta: -47.2 MB). Peak memory consumption was 38.3 MB. Max. memory is 16.1 GB. * Witness Printer took 38.91 ms. Allocated memory is still 201.3 MB. Free memory was 136.6 MB in the beginning and 131.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.8s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 0 SDslu, 119 SDs, 0 SdLazy, 69 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 161 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 237 ConstructedInterpolants, 0 QuantifiedInterpolants, 6565 SizeOfPredicates, 0 NumberOfNonLiveVariables, 976 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 304/338 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...