./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8 --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 d9f362f4d0f0336cfdd0e79a1ea9315dacff2e0b1a7a8f92f9aba0a2584524ed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:14,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:14,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:14,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:14,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:14,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:14,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:14,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:14,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:14,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:14,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:14,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:14,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:14,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:14,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:14,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:14,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:14,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:14,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:14,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:14,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:14,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:14,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:14,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:14,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:14,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:14,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:14,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:14,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:14,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:14,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:14,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:14,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:14,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:14,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:14,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:14,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:14,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:14,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:14,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:14,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:14,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:53:14,275 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:14,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:14,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:14,278 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:14,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:14,278 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:14,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:53:14,279 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:14,279 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:14,279 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:53:14,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:53:14,280 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:14,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:53:14,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:53:14,281 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:53:14,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:14,282 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:53:14,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:14,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:53:14,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:14,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:14,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:14,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:14,284 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:14,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:53:14,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:14,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:14,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:14,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:14,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:14,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:14,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:14,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:14,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:14,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:53:14,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:53:14,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:14,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:14,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:14,289 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_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9f362f4d0f0336cfdd0e79a1ea9315dacff2e0b1a7a8f92f9aba0a2584524ed [2021-11-07 00:53:14,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:14,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:14,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:14,574 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:14,575 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:14,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/nla-digbench-scaling/lcm1_valuebound2.c [2021-11-07 00:53:14,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/data/60c05629f/3bf1b9c50253478ba7d5572fe3539b54/FLAG62349e7ab [2021-11-07 00:53:15,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:15,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/sv-benchmarks/c/nla-digbench-scaling/lcm1_valuebound2.c [2021-11-07 00:53:15,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/data/60c05629f/3bf1b9c50253478ba7d5572fe3539b54/FLAG62349e7ab [2021-11-07 00:53:15,451 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/data/60c05629f/3bf1b9c50253478ba7d5572fe3539b54 [2021-11-07 00:53:15,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:15,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:15,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:15,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:15,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:15,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f78e44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15, skipping insertion in model container [2021-11-07 00:53:15,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:15,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:15,655 WARN L228 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_e78114d5-bd64-4cf3-822b-6bf919435be1/sv-benchmarks/c/nla-digbench-scaling/lcm1_valuebound2.c[552,565] [2021-11-07 00:53:15,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:15,679 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:15,730 WARN L228 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_e78114d5-bd64-4cf3-822b-6bf919435be1/sv-benchmarks/c/nla-digbench-scaling/lcm1_valuebound2.c[552,565] [2021-11-07 00:53:15,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:15,754 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:15,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15 WrapperNode [2021-11-07 00:53:15,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:15,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:15,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:15,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:15,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:15,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:15,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:15,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:15,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:15,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:15,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:15,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:15,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (1/1) ... [2021-11-07 00:53:15,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:15,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:15,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:15,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:15,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:53:15,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:15,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:15,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:53:16,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:53:16,442 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2021-11-07 00:53:16,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:16 BoogieIcfgContainer [2021-11-07 00:53:16,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:53:16,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:53:16,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:53:16,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:53:16,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:15" (1/3) ... [2021-11-07 00:53:16,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474f7c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:16, skipping insertion in model container [2021-11-07 00:53:16,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:15" (2/3) ... [2021-11-07 00:53:16,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474f7c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:16, skipping insertion in model container [2021-11-07 00:53:16,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:16" (3/3) ... [2021-11-07 00:53:16,452 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound2.c [2021-11-07 00:53:16,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:53:16,458 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 00:53:16,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:53:16,511 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:53:16,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 00:53:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.8) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 00:53:16,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:16,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 00:53:16,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:53:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash 6159882, now seen corresponding path program 1 times [2021-11-07 00:53:16,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:16,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858597385] [2021-11-07 00:53:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:16,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:16,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:53:16,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006560527] [2021-11-07 00:53:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:16,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:16,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:53:16,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 00:53:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:16,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:53:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:16,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:16,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:16,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858597385] [2021-11-07 00:53:16,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 00:53:16,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006560527] [2021-11-07 00:53:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006560527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:16,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:16,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:16,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445288295] [2021-11-07 00:53:16,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:16,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:16,960 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.8) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:21,926 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2021-11-07 00:53:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-07 00:53:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:21,934 INFO L225 Difference]: With dead ends: 73 [2021-11-07 00:53:21,935 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 00:53:21,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 00:53:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2021-11-07 00:53:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-07 00:53:21,970 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 4 [2021-11-07 00:53:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:21,971 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-07 00:53:21,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-07 00:53:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 00:53:21,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:21,972 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:22,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:22,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-07 00:53:22,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 00:53:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1169568910, now seen corresponding path program 1 times [2021-11-07 00:53:22,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:22,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892060833] [2021-11-07 00:53:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:22,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:22,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 00:53:22,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644988233] [2021-11-07 00:53:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:22,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:53:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:22,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:53:22,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e78114d5-bd64-4cf3-822b-6bf919435be1/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process