./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI --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 43051687c8aef7959ae28ac444cbd19e487fcbb5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:28:32,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:28:32,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:28:32,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:28:32,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:28:32,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:28:32,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:28:32,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:28:32,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:28:32,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:28:32,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:28:32,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:28:32,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:28:32,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:28:32,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:28:32,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:28:32,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:28:32,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:28:32,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:28:32,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:28:32,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:28:32,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:28:32,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:28:32,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:28:32,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:28:32,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:28:32,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:28:32,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:28:32,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:28:32,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:28:32,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:28:32,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:28:32,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:28:32,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:28:32,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:28:32,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:28:32,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:28:32,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:28:32,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:28:32,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:28:32,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:28:32,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:28:32,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:28:32,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:28:32,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:28:32,224 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:28:32,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:28:32,224 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:28:32,225 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:28:32,225 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:28:32,225 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:28:32,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:28:32,229 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:28:32,230 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:28:32,230 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:28:32,231 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:28:32,231 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:28:32,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:28:32,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:28:32,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:28:32,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:28:32,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:28:32,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:28:32,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:28:32,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:28:32,234 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:28:32,234 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:28:32,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:28:32,235 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:28:32,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:28:32,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:28:32,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:28:32,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:28:32,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:28:32,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:28:32,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:28:32,239 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:28:32,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:28:32,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:28:32,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:28:32,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:28:32,240 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_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43051687c8aef7959ae28ac444cbd19e487fcbb5 [2021-10-11 02:28:32,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:28:32,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:28:32,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:28:32,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:28:32,547 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:28:32,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-10-11 02:28:32,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/data/a90ea3a52/109dcde3ed1d46538bda96717fcd586a/FLAGaace73e09 [2021-10-11 02:28:33,213 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:28:33,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-10-11 02:28:33,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/data/a90ea3a52/109dcde3ed1d46538bda96717fcd586a/FLAGaace73e09 [2021-10-11 02:28:33,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/data/a90ea3a52/109dcde3ed1d46538bda96717fcd586a [2021-10-11 02:28:33,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:28:33,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:28:33,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:33,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:28:33,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:28:33,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb90919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33, skipping insertion in model container [2021-10-11 02:28:33,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:28:33,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:28:33,785 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2021-10-11 02:28:33,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:33,829 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:28:33,847 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2021-10-11 02:28:33,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:28:33,881 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:28:33,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33 WrapperNode [2021-10-11 02:28:33,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:28:33,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:33,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:28:33,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:28:33,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:28:33,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:28:33,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:28:33,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:28:33,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... [2021-10-11 02:28:33,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:28:33,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:28:33,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:28:33,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:28:33,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:28:34,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:28:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:28:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:28:34,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:28:34,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:28:34,474 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 02:28:34,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:34 BoogieIcfgContainer [2021-10-11 02:28:34,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:28:34,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:28:34,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:28:34,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:28:34,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:28:33" (1/3) ... [2021-10-11 02:28:34,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7c37e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:34, skipping insertion in model container [2021-10-11 02:28:34,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:28:33" (2/3) ... [2021-10-11 02:28:34,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7c37e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:28:34, skipping insertion in model container [2021-10-11 02:28:34,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:34" (3/3) ... [2021-10-11 02:28:34,497 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound10.c [2021-10-11 02:28:34,511 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:28:34,515 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 02:28:34,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 02:28:34,551 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:28:34,551 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:28:34,551 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:28:34,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:28:34,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:28:34,552 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:28:34,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:28:34,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:28:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-10-11 02:28:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:28:34,571 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:34,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:28:34,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash 114272414, now seen corresponding path program 1 times [2021-10-11 02:28:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:34,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060083436] [2021-10-11 02:28:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060083436] [2021-10-11 02:28:34,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:34,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:28:34,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256200265] [2021-10-11 02:28:34,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:28:34,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:34,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:28:34,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:28:34,845 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-10-11 02:28:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:34,864 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-11 02:28:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:28:34,866 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:28:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:34,888 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:28:34,899 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:28:34,903 INFO L677 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 [2021-10-11 02:28:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:28:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:28:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:28:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-11 02:28:34,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-11 02:28:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-11 02:28:34,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:28:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-11 02:28:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:28:34,949 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:34,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:28:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:28:34,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:34,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash 113105601, now seen corresponding path program 1 times [2021-10-11 02:28:34,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:34,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414421751] [2021-10-11 02:28:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:35,002 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:28:35,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056961126] [2021-10-11 02:28:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:28:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:35,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:28:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:35,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:35,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414421751] [2021-10-11 02:28:35,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:35,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056961126] [2021-10-11 02:28:35,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:35,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-11 02:28:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723951551] [2021-10-11 02:28:35,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:28:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:28:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:35,334 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2021-10-11 02:28:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:37,755 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-11 02:28:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:28:37,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:28:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:37,757 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:28:37,758 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:28:37,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:28:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:28:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2021-10-11 02:28:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:28:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:28:37,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2021-10-11 02:28:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:37,775 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:28:37,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:28:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:28:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:28:37,777 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:37,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:28:37,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:28:37,999 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:38,000 INFO L82 PathProgramCache]: Analyzing trace with hash -788721413, now seen corresponding path program 1 times [2021-10-11 02:28:38,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:38,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007559869] [2021-10-11 02:28:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:38,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:28:38,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228921674] [2021-10-11 02:28:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:28:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:28:38,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:38,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:38,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007559869] [2021-10-11 02:28:38,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228921674] [2021-10-11 02:28:38,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:38,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-11 02:28:38,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077446339] [2021-10-11 02:28:38,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:28:38,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:38,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:28:38,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:28:38,157 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2021-10-11 02:28:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:38,222 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-11 02:28:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:28:38,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2021-10-11 02:28:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:38,225 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:28:38,225 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 02:28:38,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:28:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 02:28:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-10-11 02:28:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:28:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-11 02:28:38,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 6 [2021-10-11 02:28:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:38,246 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-11 02:28:38,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:28:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-11 02:28:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:28:38,249 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:28:38,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:28:38,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:38,463 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:28:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:28:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2015458316, now seen corresponding path program 1 times [2021-10-11 02:28:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:28:38,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191588825] [2021-10-11 02:28:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:28:38,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:28:38,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566607634] [2021-10-11 02:28:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:28:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:28:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 02:28:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:28:38,749 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-10-11 02:28:38,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:28:38,844 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:38,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:38,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:38,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:28:38,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:28:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:38,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:28:39,127 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:28:39,128 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:39,137 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:28:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:28:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191588825] [2021-10-11 02:28:39,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:28:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566607634] [2021-10-11 02:28:39,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:28:39,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-10-11 02:28:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219327472] [2021-10-11 02:28:39,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:28:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:28:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:28:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:28:39,154 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2021-10-11 02:28:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:28:39,156 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-10-11 02:28:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:28:39,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2021-10-11 02:28:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:28:39,157 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:28:39,157 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:28:39,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:28:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:28:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:28:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:28:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:28:39,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2021-10-11 02:28:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:28:39,159 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:28:39,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:28:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:28:39,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:28:39,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:28:39,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:28:39,393 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:28:39,393 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:28:39,394 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:28:39,394 INFO L262 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-10-11 02:28:39,394 INFO L258 CegarLoopResult]: At program point L12-2(lines 36 37) the Hoare annotation is: false [2021-10-11 02:28:39,394 INFO L262 CegarLoopResult]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-10-11 02:28:39,395 INFO L258 CegarLoopResult]: At program point L12-5(lines 11 17) the Hoare annotation is: false [2021-10-11 02:28:39,395 INFO L262 CegarLoopResult]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-10-11 02:28:39,395 INFO L265 CegarLoopResult]: At program point L12-8(lines 11 17) the Hoare annotation is: true [2021-10-11 02:28:39,395 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:28:39,395 INFO L262 CegarLoopResult]: For program point L33-1(lines 33 54) no Hoare annotation was computed. [2021-10-11 02:28:39,396 INFO L262 CegarLoopResult]: For program point L33-3(lines 33 54) no Hoare annotation was computed. [2021-10-11 02:28:39,396 INFO L262 CegarLoopResult]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-10-11 02:28:39,396 INFO L258 CegarLoopResult]: At program point L46-2(lines 33 54) the Hoare annotation is: false [2021-10-11 02:28:39,396 INFO L262 CegarLoopResult]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-10-11 02:28:39,396 INFO L262 CegarLoopResult]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-10-11 02:28:39,397 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-10-11 02:28:39,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:28:39 BoogieIcfgContainer [2021-10-11 02:28:39,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:28:39,408 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:28:39,408 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:28:39,408 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:28:39,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:28:34" (3/4) ... [2021-10-11 02:28:39,413 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:28:39,424 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-11 02:28:39,425 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:28:39,425 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:28:39,426 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:28:39,480 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf01d15a-3370-4e86-b157-564187f963a6/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:28:39,480 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:28:39,482 INFO L168 Benchmark]: Toolchain (without parser) took 5910.73 ms. Allocated memory was 125.8 MB in the beginning and 165.7 MB in the end (delta: 39.8 MB). Free memory was 89.8 MB in the beginning and 121.6 MB in the end (delta: -31.8 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:39,483 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 97.3 MB in the end (delta: 25.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:39,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.98 ms. Allocated memory is still 125.8 MB. Free memory was 89.4 MB in the beginning and 100.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:39,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.69 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 98.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:39,485 INFO L168 Benchmark]: Boogie Preprocessor took 24.37 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 97.3 MB in the end (delta: 740.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:39,493 INFO L168 Benchmark]: RCFGBuilder took 531.83 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 71.4 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:39,494 INFO L168 Benchmark]: TraceAbstraction took 4928.60 ms. Allocated memory was 125.8 MB in the beginning and 165.7 MB in the end (delta: 39.8 MB). Free memory was 71.4 MB in the beginning and 123.7 MB in the end (delta: -52.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:28:39,494 INFO L168 Benchmark]: Witness Printer took 72.72 ms. Allocated memory is still 165.7 MB. Free memory was 123.7 MB in the beginning and 121.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:28:39,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 97.3 MB in the end (delta: 25.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.98 ms. Allocated memory is still 125.8 MB. Free memory was 89.4 MB in the beginning and 100.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.69 ms. Allocated memory is still 125.8 MB. Free memory was 100.2 MB in the beginning and 98.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.37 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 97.3 MB in the end (delta: 740.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 531.83 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 71.4 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4928.60 ms. Allocated memory was 125.8 MB in the beginning and 165.7 MB in the end (delta: 39.8 MB). Free memory was 71.4 MB in the beginning and 123.7 MB in the end (delta: -52.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 72.72 ms. Allocated memory is still 165.7 MB. Free memory was 123.7 MB in the beginning and 121.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 48 SDslu, 76 SDs, 0 SdLazy, 42 SolverSat, 16 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, 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, 4 MinimizatonAttempts, 29 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 5 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1344 SizeOfPredicates, 24 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...