./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.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-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f42b09f9bbe79e0765dd760dc5dae991687d89f ....................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f42b09f9bbe79e0765dd760dc5dae991687d89f ............................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:41:57,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:41:57,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:41:57,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:41:57,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:41:57,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:41:57,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:41:57,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:41:57,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:41:57,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:41:57,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:41:57,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:41:57,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:41:57,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:41:57,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:41:57,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:41:57,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:41:57,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:41:57,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:41:57,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:41:57,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:41:57,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:41:57,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:41:57,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:41:57,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:41:57,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:41:57,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:41:57,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:41:57,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:41:57,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:41:57,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:41:57,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:41:57,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:41:57,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:41:57,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:41:57,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:41:57,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:41:57,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:41:57,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:41:57,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:41:57,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:41:57,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:41:57,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:41:57,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:41:57,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:41:57,276 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:41:57,286 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:41:57,286 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:41:57,286 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:41:57,286 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:41:57,286 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:41:57,287 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:41:57,287 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:41:57,287 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:41:57,287 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:41:57,287 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:41:57,287 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:41:57,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:41:57,288 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:41:57,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:41:57,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:41:57,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:41:57,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:41:57,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:41:57,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:41:57,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:41:57,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:41:57,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:41:57,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:41:57,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f42b09f9bbe79e0765dd760dc5dae991687d89f [2020-12-09 07:41:57,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:41:57,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:41:57,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:41:57,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:41:57,477 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:41:57,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2020-12-09 07:41:57,519 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/e3244a6eb/5153f2ba82c94ed0a0a38f774b63c8fc/FLAG324870360 [2020-12-09 07:41:57,884 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:41:57,885 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2020-12-09 07:41:57,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/e3244a6eb/5153f2ba82c94ed0a0a38f774b63c8fc/FLAG324870360 [2020-12-09 07:41:57,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/e3244a6eb/5153f2ba82c94ed0a0a38f774b63c8fc [2020-12-09 07:41:57,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:41:57,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:41:57,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:41:57,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:41:57,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:41:57,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:41:57" (1/1) ... [2020-12-09 07:41:57,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78cd5788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:57, skipping insertion in model container [2020-12-09 07:41:57,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:41:57" (1/1) ... [2020-12-09 07:41:57,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:41:57,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:41:58,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2020-12-09 07:41:58,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:41:58,063 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:41:58,075 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2020-12-09 07:41:58,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:41:58,090 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:41:58,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58 WrapperNode [2020-12-09 07:41:58,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:41:58,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:41:58,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:41:58,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:41:58,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:41:58,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:41:58,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:41:58,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:41:58,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... [2020-12-09 07:41:58,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:41:58,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:41:58,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:41:58,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:41:58,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:41:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:41:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:41:58,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:41:58,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:41:58,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:41:58,367 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 07:41:58,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:41:58 BoogieIcfgContainer [2020-12-09 07:41:58,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:41:58,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:41:58,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:41:58,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:41:58,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:41:57" (1/3) ... [2020-12-09 07:41:58,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c75f7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:41:58, skipping insertion in model container [2020-12-09 07:41:58,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:58" (2/3) ... [2020-12-09 07:41:58,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c75f7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:41:58, skipping insertion in model container [2020-12-09 07:41:58,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:41:58" (3/3) ... [2020-12-09 07:41:58,375 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound50.c [2020-12-09 07:41:58,386 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:41:58,388 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 07:41:58,396 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 07:41:58,413 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:41:58,414 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:41:58,414 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:41:58,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:41:58,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:41:58,414 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:41:58,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:41:58,414 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:41:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 07:41:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:41:58,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:41:58,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:41:58,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:41:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:41:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash 71331668, now seen corresponding path program 1 times [2020-12-09 07:41:58,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:41:58,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493496604] [2020-12-09 07:41:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:41:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:41:58,516 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:41:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:41:58,532 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:41:58,547 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:41:58,547 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:41:58,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:41:58,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:41:58 BoogieIcfgContainer [2020-12-09 07:41:58,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:41:58,565 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:41:58,565 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:41:58,565 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:41:58,565 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:41:58" (3/4) ... [2020-12-09 07:41:58,568 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 07:41:58,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:41:58,570 INFO L168 Benchmark]: Toolchain (without parser) took 666.31 ms. Allocated memory is still 138.4 MB. Free memory was 117.3 MB in the beginning and 81.4 MB in the end (delta: 35.9 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. [2020-12-09 07:41:58,570 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory is still 41.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:41:58,571 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.57 ms. Allocated memory is still 138.4 MB. Free memory was 117.3 MB in the beginning and 110.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 07:41:58,571 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.81 ms. Allocated memory is still 138.4 MB. Free memory was 110.7 MB in the beginning and 109.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:41:58,572 INFO L168 Benchmark]: Boogie Preprocessor took 15.65 ms. Allocated memory is still 138.4 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 973.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:41:58,573 INFO L168 Benchmark]: RCFGBuilder took 237.87 ms. Allocated memory is still 138.4 MB. Free memory was 108.1 MB in the beginning and 94.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:41:58,574 INFO L168 Benchmark]: TraceAbstraction took 194.24 ms. Allocated memory is still 138.4 MB. Free memory was 93.9 MB in the beginning and 81.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:41:58,574 INFO L168 Benchmark]: Witness Printer took 3.34 ms. Allocated memory is still 138.4 MB. Free memory was 81.7 MB in the beginning and 81.4 MB in the end (delta: 309.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:41:58,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory is still 41.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 187.57 ms. Allocated memory is still 138.4 MB. Free memory was 117.3 MB in the beginning and 110.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.81 ms. Allocated memory is still 138.4 MB. Free memory was 110.7 MB in the beginning and 109.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.65 ms. Allocated memory is still 138.4 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 973.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 237.87 ms. Allocated memory is still 138.4 MB. Free memory was 108.1 MB in the beginning and 94.3 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 194.24 ms. Allocated memory is still 138.4 MB. Free memory was 93.9 MB in the beginning and 81.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.34 ms. Allocated memory is still 138.4 MB. Free memory was 81.7 MB in the beginning and 81.4 MB in the end (delta: 309.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<50 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:42:00,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:42:00,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:42:00,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:42:00,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:42:00,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:42:00,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:42:00,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:42:00,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:42:00,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:42:00,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:42:00,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:42:00,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:42:00,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:42:00,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:42:00,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:42:00,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:42:00,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:42:00,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:42:00,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:42:00,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:42:00,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:42:00,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:42:00,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:42:00,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:42:00,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:42:00,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:42:00,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:42:00,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:42:00,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:42:00,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:42:00,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:42:00,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:42:00,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:42:00,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:42:00,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:42:00,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:42:00,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:42:00,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:42:00,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:42:00,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:42:00,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 07:42:00,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:42:00,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:42:00,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:42:00,267 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:42:00,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:42:00,267 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:42:00,267 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:42:00,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:42:00,268 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:42:00,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:42:00,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:42:00,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 07:42:00,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:42:00,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:42:00,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:42:00,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:42:00,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:42:00,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 07:42:00,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:42:00,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:42:00,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:42:00,271 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f42b09f9bbe79e0765dd760dc5dae991687d89f [2020-12-09 07:42:00,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:42:00,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:42:00,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:42:00,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:42:00,524 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:42:00,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2020-12-09 07:42:00,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/b5e14e599/80c15c42dfc64f3eaf5cf9634f7de80d/FLAGbd6c7d411 [2020-12-09 07:42:00,954 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:42:00,954 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c [2020-12-09 07:42:00,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/b5e14e599/80c15c42dfc64f3eaf5cf9634f7de80d/FLAGbd6c7d411 [2020-12-09 07:42:00,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/data/b5e14e599/80c15c42dfc64f3eaf5cf9634f7de80d [2020-12-09 07:42:00,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:42:00,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:42:00,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:42:00,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:42:00,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:42:00,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:42:00" (1/1) ... [2020-12-09 07:42:00,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8b208b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:00, skipping insertion in model container [2020-12-09 07:42:00,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:42:00" (1/1) ... [2020-12-09 07:42:00,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:42:01,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:42:01,111 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2020-12-09 07:42:01,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:42:01,138 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:42:01,156 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound50.c[712,725] [2020-12-09 07:42:01,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:42:01,176 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:42:01,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01 WrapperNode [2020-12-09 07:42:01,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:42:01,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:42:01,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:42:01,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:42:01,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:42:01,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:42:01,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:42:01,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:42:01,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... [2020-12-09 07:42:01,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:42:01,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:42:01,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:42:01,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:42:01,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:42:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 07:42:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:42:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:42:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:42:08,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:42:08,446 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 07:42:08,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:42:08 BoogieIcfgContainer [2020-12-09 07:42:08,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:42:08,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:42:08,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:42:08,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:42:08,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:42:00" (1/3) ... [2020-12-09 07:42:08,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3846f3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:42:08, skipping insertion in model container [2020-12-09 07:42:08,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:01" (2/3) ... [2020-12-09 07:42:08,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3846f3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:42:08, skipping insertion in model container [2020-12-09 07:42:08,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:42:08" (3/3) ... [2020-12-09 07:42:08,453 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound50.c [2020-12-09 07:42:08,463 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:42:08,465 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 07:42:08,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 07:42:08,488 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:42:08,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:42:08,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:42:08,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:42:08,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:42:08,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:42:08,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:42:08,488 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:42:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 07:42:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 07:42:08,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:42:08,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 07:42:08,500 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:42:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:42:08,503 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-09 07:42:08,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:42:08,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95836563] [2020-12-09 07:42:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 07:42:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:42:10,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 07:42:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:42:18,878 WARN L197 SmtUtils]: Spent 7.63 s on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 07:42:29,134 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse1 ULTIMATE.start_main_~a~0) .cse1)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) is different from false [2020-12-09 07:42:35,262 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2020-12-09 07:42:37,292 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 v_prenex_1) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven v_prenex_1 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2020-12-09 07:42:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:42:37,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:42:37,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95836563] [2020-12-09 07:42:37,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:42:37,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 07:42:37,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429522892] [2020-12-09 07:42:37,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:42:37,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:42:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:42:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=7, Unknown=3, NotChecked=10, Total=30 [2020-12-09 07:42:37,311 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2020-12-09 07:42:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:42:44,464 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-12-09 07:42:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:42:44,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-09 07:42:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:42:44,486 INFO L225 Difference]: With dead ends: 35 [2020-12-09 07:42:44,486 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 07:42:44,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=10, Invalid=7, Unknown=3, NotChecked=10, Total=30 [2020-12-09 07:42:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 07:42:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-09 07:42:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 07:42:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 07:42:44,510 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2020-12-09 07:42:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:42:44,510 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 07:42:44,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:42:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 07:42:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 07:42:44,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:42:44,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:42:44,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 07:42:44,713 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:42:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:42:44,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1806862075, now seen corresponding path program 1 times [2020-12-09 07:42:44,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:42:44,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146796231] [2020-12-09 07:42:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 07:42:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:42:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:42:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:42:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:42:45,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:42:45,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146796231] [2020-12-09 07:42:45,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:42:45,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:42:45,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973748413] [2020-12-09 07:42:45,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:42:45,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:42:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:42:45,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:42:45,106 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-09 07:42:47,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:42:47,876 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-09 07:42:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:42:47,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 07:42:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:42:47,877 INFO L225 Difference]: With dead ends: 19 [2020-12-09 07:42:47,877 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 07:42:47,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:42:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 07:42:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 07:42:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 07:42:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 07:42:47,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2020-12-09 07:42:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:42:47,881 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 07:42:47,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:42:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 07:42:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 07:42:47,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:42:47,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:42:48,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 07:42:48,084 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:42:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:42:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1274494228, now seen corresponding path program 1 times [2020-12-09 07:42:48,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:42:48,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407217075] [2020-12-09 07:42:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 07:42:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:42:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 07:42:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:42:50,478 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from false [2020-12-09 07:42:52,531 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from true [2020-12-09 07:42:54,584 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-12-09 07:42:56,635 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-12-09 07:43:02,794 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-12-09 07:43:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:43:02,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:43:02,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407217075] [2020-12-09 07:43:02,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:43:02,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 07:43:02,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28538092] [2020-12-09 07:43:02,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 07:43:02,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:43:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 07:43:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-09 07:43:02,804 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-12-09 07:43:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:43:02,807 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-09 07:43:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:43:02,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 07:43:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:43:02,807 INFO L225 Difference]: With dead ends: 19 [2020-12-09 07:43:02,807 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 07:43:02,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=7, Invalid=2, Unknown=5, NotChecked=6, Total=20 [2020-12-09 07:43:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 07:43:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 07:43:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 07:43:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 07:43:02,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2020-12-09 07:43:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:43:02,811 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 07:43:02,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 07:43:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 07:43:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 07:43:02,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:43:02,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 07:43:03,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 07:43:03,013 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:43:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:43:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-09 07:43:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:43:03,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398311768] [2020-12-09 07:43:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 07:43:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:43:05,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:43:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:43:15,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:43:15,433 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 07:43:15,433 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:43:15,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 07:43:15,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:43:15 BoogieIcfgContainer [2020-12-09 07:43:15,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:43:15,662 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:43:15,662 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:43:15,662 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:43:15,662 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:42:08" (3/4) ... [2020-12-09 07:43:15,663 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:43:15,692 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5a0d6838-52d2-48be-b669-e92d904fc771/bin/utaipan/witness.graphml [2020-12-09 07:43:15,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:43:15,692 INFO L168 Benchmark]: Toolchain (without parser) took 74715.16 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 45.7 MB in the beginning and 66.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:15,693 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 134.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:43:15,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.04 ms. Allocated memory is still 79.7 MB. Free memory was 45.5 MB in the beginning and 63.0 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:15,693 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.70 ms. Allocated memory is still 79.7 MB. Free memory was 63.0 MB in the beginning and 61.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:43:15,694 INFO L168 Benchmark]: Boogie Preprocessor took 19.18 ms. Allocated memory is still 79.7 MB. Free memory was 61.5 MB in the beginning and 60.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:15,694 INFO L168 Benchmark]: RCFGBuilder took 7225.60 ms. Allocated memory is still 79.7 MB. Free memory was 60.1 MB in the beginning and 47.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:15,695 INFO L168 Benchmark]: TraceAbstraction took 67212.36 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 46.8 MB in the beginning and 68.1 MB in the end (delta: -21.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:15,695 INFO L168 Benchmark]: Witness Printer took 30.16 ms. Allocated memory is still 104.9 MB. Free memory was 68.1 MB in the beginning and 66.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:43:15,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 79.7 MB. Free memory was 62.1 MB in the beginning and 62.0 MB in the end (delta: 134.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 198.04 ms. Allocated memory is still 79.7 MB. Free memory was 45.5 MB in the beginning and 63.0 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.70 ms. Allocated memory is still 79.7 MB. Free memory was 63.0 MB in the beginning and 61.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.18 ms. Allocated memory is still 79.7 MB. Free memory was 61.5 MB in the beginning and 60.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 7225.60 ms. Allocated memory is still 79.7 MB. Free memory was 60.1 MB in the beginning and 47.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 67212.36 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 46.8 MB in the beginning and 68.1 MB in the end (delta: -21.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Witness Printer took 30.16 ms. Allocated memory is still 104.9 MB. Free memory was 68.1 MB in the beginning and 66.0 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: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<50 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x > r)) [L37] x = x - r [L38] r = r + 1 VAL [counter=1] [L32] EXPR counter++ VAL [counter=2] [L32] COND TRUE counter++<50 [L17] COND TRUE !(cond) VAL [counter=2] [L19] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 67.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 4 SDslu, 45 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 41.2s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 3 QuantifiedInterpolants, 1921 SizeOfPredicates, 13 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 incorrect! Received shutdown request...