./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 .................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 .......................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-e943c26 [2021-10-21 19:07:14,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:07:14,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:07:14,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:07:14,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:07:14,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:07:14,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:07:14,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:07:14,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:07:14,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:07:14,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:07:14,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:07:14,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:07:14,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:07:14,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:07:14,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:07:14,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:07:14,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:07:14,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:07:14,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:07:14,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:07:14,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:07:14,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:07:14,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:07:14,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:07:14,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:07:14,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:07:14,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:07:14,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:07:14,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:07:14,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:07:14,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:07:14,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:07:14,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:07:14,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:07:14,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:07:14,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:07:14,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:07:14,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:07:14,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:07:14,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:07:14,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:07:14,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:07:14,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:07:14,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:07:14,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:07:14,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:07:14,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:07:14,189 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:07:14,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:07:14,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:07:14,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:07:14,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:07:14,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:07:14,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:07:14,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:07:14,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:07:14,191 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:07:14,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:07:14,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:07:14,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:07:14,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:07:14,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:07:14,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:07:14,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:07:14,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:07:14,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:07:14,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:07:14,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:07:14,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:07:14,194 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:07:14,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:07:14,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:07:14,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:07:14,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-10-21 19:07:14,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:07:14,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:07:14,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:07:14,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:07:14,498 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:07:14,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-21 19:07:14,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/b1a9866c8/930bb66b99fe438bbec1355170f29b93/FLAG3c7417de1 [2021-10-21 19:07:15,015 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:07:15,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-21 19:07:15,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/b1a9866c8/930bb66b99fe438bbec1355170f29b93/FLAG3c7417de1 [2021-10-21 19:07:15,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/b1a9866c8/930bb66b99fe438bbec1355170f29b93 [2021-10-21 19:07:15,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:07:15,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:07:15,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:07:15,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:07:15,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:07:15,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7945091e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15, skipping insertion in model container [2021-10-21 19:07:15,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:07:15,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:07:15,586 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_ddee71d4-d559-4a47-876b-181d5353c89b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-21 19:07:15,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:07:15,641 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:07:15,658 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_ddee71d4-d559-4a47-876b-181d5353c89b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-21 19:07:15,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:07:15,680 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:07:15,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15 WrapperNode [2021-10-21 19:07:15,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:07:15,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:07:15,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:07:15,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:07:15,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:07:15,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:07:15,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:07:15,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:07:15,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:07:15,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:07:15,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:07:15,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:07:15,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (1/1) ... [2021-10-21 19:07:15,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:07:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:07:15,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:07:15,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:07:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:07:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:07:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:07:15,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:07:16,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:07:16,045 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:07:16,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:07:16 BoogieIcfgContainer [2021-10-21 19:07:16,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:07:16,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:07:16,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:07:16,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:07:16,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:07:15" (1/3) ... [2021-10-21 19:07:16,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1b7583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:07:16, skipping insertion in model container [2021-10-21 19:07:16,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:15" (2/3) ... [2021-10-21 19:07:16,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1b7583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:07:16, skipping insertion in model container [2021-10-21 19:07:16,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:07:16" (3/3) ... [2021-10-21 19:07:16,056 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-10-21 19:07:16,063 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:07:16,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:07:16,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:07:16,165 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=PETRI_NET, 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 [2021-10-21 19:07:16,165 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:07:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-10-21 19:07:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:07:16,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:07:16,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:07:16,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:07:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:07:16,216 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-10-21 19:07:16,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:07:16,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942285024] [2021-10-21 19:07:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:07:16,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:07:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:07:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:07:16,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:07:16,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942285024] [2021-10-21 19:07:16,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942285024] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:07:16,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:07:16,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:07:16,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611711802] [2021-10-21 19:07:16,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:07:16,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:07:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:07:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:07:16,439 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-21 19:07:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:07:16,454 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-10-21 19:07:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:07:16,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-10-21 19:07:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:07:16,465 INFO L225 Difference]: With dead ends: 29 [2021-10-21 19:07:16,466 INFO L226 Difference]: Without dead ends: 12 [2021-10-21 19:07:16,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:07:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-21 19:07:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-21 19:07:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-10-21 19:07:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-21 19:07:16,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-10-21 19:07:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:07:16,503 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-21 19:07:16,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-21 19:07:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-21 19:07:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:07:16,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:07:16,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:07:16,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:07:16,505 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:07:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:07:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-10-21 19:07:16,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:07:16,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290564250] [2021-10-21 19:07:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:07:16,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:07:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:07:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:07:16,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:07:16,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290564250] [2021-10-21 19:07:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290564250] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:07:16,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:07:16,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:07:16,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369904697] [2021-10-21 19:07:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:07:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:07:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:07:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:07:16,633 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-21 19:07:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:07:16,652 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-21 19:07:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:07:16,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-10-21 19:07:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:07:16,654 INFO L225 Difference]: With dead ends: 23 [2021-10-21 19:07:16,654 INFO L226 Difference]: Without dead ends: 15 [2021-10-21 19:07:16,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:07:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-21 19:07:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-21 19:07:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-10-21 19:07:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-21 19:07:16,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-21 19:07:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:07:16,661 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-21 19:07:16,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-21 19:07:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-21 19:07:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:07:16,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:07:16,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:07:16,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:07:16,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:07:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:07:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-10-21 19:07:16,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:07:16,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195235158] [2021-10-21 19:07:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:07:16,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:07:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:07:16,710 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:07:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:07:16,810 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:07:16,811 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:07:16,812 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:07:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:07:16,821 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:07:16,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:07:16 BoogieIcfgContainer [2021-10-21 19:07:16,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:07:16,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:07:16,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:07:16,849 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:07:16,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:07:16" (3/4) ... [2021-10-21 19:07:16,853 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:07:16,854 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:07:16,856 INFO L168 Benchmark]: Toolchain (without parser) took 1451.78 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 45.7 MB in the beginning and 54.6 MB in the end (delta: -8.9 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:16,857 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory is still 61.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:07:16,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.37 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 45.5 MB in the beginning and 97.3 MB in the end (delta: -51.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:16,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.76 ms. Allocated memory is still 121.6 MB. Free memory was 96.9 MB in the beginning and 95.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:07:16,859 INFO L168 Benchmark]: Boogie Preprocessor took 24.90 ms. Allocated memory is still 121.6 MB. Free memory was 95.7 MB in the beginning and 94.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:16,860 INFO L168 Benchmark]: RCFGBuilder took 297.25 ms. Allocated memory is still 121.6 MB. Free memory was 94.5 MB in the beginning and 84.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:16,861 INFO L168 Benchmark]: TraceAbstraction took 798.99 ms. Allocated memory is still 121.6 MB. Free memory was 84.0 MB in the beginning and 55.0 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:16,862 INFO L168 Benchmark]: Witness Printer took 5.07 ms. Allocated memory is still 121.6 MB. Free memory was 55.0 MB in the beginning and 54.6 MB in the end (delta: 383.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:07:16,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory is still 61.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.37 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 45.5 MB in the beginning and 97.3 MB in the end (delta: -51.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.76 ms. Allocated memory is still 121.6 MB. Free memory was 96.9 MB in the beginning and 95.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.90 ms. Allocated memory is still 121.6 MB. Free memory was 95.7 MB in the beginning and 94.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 297.25 ms. Allocated memory is still 121.6 MB. Free memory was 94.5 MB in the beginning and 84.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 798.99 ms. Allocated memory is still 121.6 MB. Free memory was 84.0 MB in the beginning and 55.0 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.07 ms. Allocated memory is still 121.6 MB. Free memory was 55.0 MB in the beginning and 54.6 MB in the end (delta: 383.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L14] float pi = 3.14159 ; VAL [pi=314159/100000] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=314159/100000] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=314159/100000] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=314159/100000] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L12] reach_error() VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 672.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 12.2ms, AutomataDifference: 70.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.3ms SsaConstructionTime, 100.2ms SatisfiabilityAnalysisTime, 136.3ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 [2021-10-21 19:07:16,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:07:19,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:07:19,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:07:19,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:07:19,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:07:19,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:07:19,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:07:19,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:07:19,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:07:19,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:07:19,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:07:19,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:07:19,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:07:19,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:07:19,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:07:19,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:07:19,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:07:19,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:07:19,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:07:19,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:07:19,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:07:19,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:07:19,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:07:19,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:07:19,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:07:19,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:07:19,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:07:19,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:07:19,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:07:19,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:07:19,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:07:19,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:07:19,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:07:19,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:07:19,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:07:19,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:07:19,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:07:19,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:07:19,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:07:19,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:07:19,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:07:19,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 19:07:19,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:07:19,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:07:19,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:07:19,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:07:19,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:07:19,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:07:19,673 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:07:19,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:07:19,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:07:19,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:07:19,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:07:19,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:07:19,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:07:19,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:07:19,675 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:07:19,676 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:07:19,676 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:07:19,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:07:19,676 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:07:19,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:07:19,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:07:19,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:07:19,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:07:19,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:07:19,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:07:19,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:07:19,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:07:19,678 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:07:19,679 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:07:19,679 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:07:19,679 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:07:19,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:07:19,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:07:19,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:07:19,680 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_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-10-21 19:07:20,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:07:20,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:07:20,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:07:20,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:07:20,151 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:07:20,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-21 19:07:20,225 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/d0a039e4a/4782207f320a473bb86e563409314f0e/FLAGd7a0ecce0 [2021-10-21 19:07:20,741 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:07:20,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-21 19:07:20,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/d0a039e4a/4782207f320a473bb86e563409314f0e/FLAGd7a0ecce0 [2021-10-21 19:07:21,112 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/data/d0a039e4a/4782207f320a473bb86e563409314f0e [2021-10-21 19:07:21,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:07:21,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:07:21,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:07:21,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:07:21,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:07:21,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4504fb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21, skipping insertion in model container [2021-10-21 19:07:21,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:07:21,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:07:21,298 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_ddee71d4-d559-4a47-876b-181d5353c89b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-21 19:07:21,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:07:21,358 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:07:21,391 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_ddee71d4-d559-4a47-876b-181d5353c89b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-21 19:07:21,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:07:21,423 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:07:21,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21 WrapperNode [2021-10-21 19:07:21,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:07:21,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:07:21,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:07:21,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:07:21,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:07:21,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:07:21,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:07:21,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:07:21,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:07:21,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:07:21,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:07:21,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:07:21,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (1/1) ... [2021-10-21 19:07:21,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:07:21,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:07:21,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:07:21,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:07:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:07:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:07:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:07:21,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:07:27,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:07:27,064 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-21 19:07:27,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:07:27 BoogieIcfgContainer [2021-10-21 19:07:27,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:07:27,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:07:27,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:07:27,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:07:27,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:07:21" (1/3) ... [2021-10-21 19:07:27,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e40c0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:07:27, skipping insertion in model container [2021-10-21 19:07:27,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:07:21" (2/3) ... [2021-10-21 19:07:27,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e40c0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:07:27, skipping insertion in model container [2021-10-21 19:07:27,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:07:27" (3/3) ... [2021-10-21 19:07:27,077 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-10-21 19:07:27,084 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:07:27,084 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:07:27,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:07:27,147 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=PETRI_NET, 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 [2021-10-21 19:07:27,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:07:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-10-21 19:07:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:07:27,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:07:27,168 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:07:27,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:07:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:07:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-10-21 19:07:27,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:07:27,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630719045] [2021-10-21 19:07:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:07:27,202 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:07:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:07:27,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:07:27,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:07:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:07:27,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 19:07:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:07:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:07:27,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:07:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:07:27,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:07:27,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630719045] [2021-10-21 19:07:27,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630719045] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:07:27,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:07:27,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:07:27,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110339116] [2021-10-21 19:07:27,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:07:27,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:07:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:07:27,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:07:27,623 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-21 19:07:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:07:27,640 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-10-21 19:07:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:07:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-10-21 19:07:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:07:27,654 INFO L225 Difference]: With dead ends: 29 [2021-10-21 19:07:27,654 INFO L226 Difference]: Without dead ends: 12 [2021-10-21 19:07:27,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:07:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-21 19:07:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-21 19:07:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-10-21 19:07:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-21 19:07:27,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-10-21 19:07:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:07:27,700 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-21 19:07:27,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-21 19:07:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-21 19:07:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:07:27,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:07:27,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:07:27,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-21 19:07:27,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:07:27,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:07:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:07:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-10-21 19:07:27,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:07:27,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521659628] [2021-10-21 19:07:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:07:27,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:07:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:07:27,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:07:27,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:07:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:07:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:07:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:07:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:07:28,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:07:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:07:29,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:07:29,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521659628] [2021-10-21 19:07:29,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521659628] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:07:29,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:07:29,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 19:07:29,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708068649] [2021-10-21 19:07:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:07:29,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:07:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:07:29,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:07:29,038 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-21 19:07:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:07:34,569 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-21 19:07:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:07:34,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 11 [2021-10-21 19:07:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:07:34,571 INFO L225 Difference]: With dead ends: 24 [2021-10-21 19:07:34,571 INFO L226 Difference]: Without dead ends: 16 [2021-10-21 19:07:34,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:07:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-21 19:07:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-10-21 19:07:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-10-21 19:07:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-21 19:07:34,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-21 19:07:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:07:34,578 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-21 19:07:34,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-21 19:07:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-21 19:07:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:07:34,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:07:34,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:07:34,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:07:34,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:07:34,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:07:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:07:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-10-21 19:07:34,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:07:34,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346268590] [2021-10-21 19:07:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:07:34,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:07:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:07:34,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:07:34,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:07:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:07:35,685 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:07:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:07:36,621 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 19:07:36,621 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:07:36,623 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:07:36,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-21 19:07:36,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:07:36,831 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:07:36,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:07:36 BoogieIcfgContainer [2021-10-21 19:07:36,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:07:36,899 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:07:36,899 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:07:36,899 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:07:36,900 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:07:27" (3/4) ... [2021-10-21 19:07:36,902 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:07:36,981 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:07:36,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:07:36,991 INFO L168 Benchmark]: Toolchain (without parser) took 15874.42 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 41.9 MB in the beginning and 63.0 MB in the end (delta: -21.1 MB). Peak memory consumption was 831.6 kB. Max. memory is 16.1 GB. [2021-10-21 19:07:36,992 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 62.9 MB. Free memory is still 42.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:07:36,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.73 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 44.5 MB in the end (delta: -2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:36,998 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.75 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 42.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:07:36,998 INFO L168 Benchmark]: Boogie Preprocessor took 30.38 ms. Allocated memory is still 62.9 MB. Free memory was 42.9 MB in the beginning and 41.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:36,999 INFO L168 Benchmark]: RCFGBuilder took 5573.41 ms. Allocated memory is still 62.9 MB. Free memory was 41.5 MB in the beginning and 31.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:37,000 INFO L168 Benchmark]: TraceAbstraction took 9828.03 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 30.7 MB in the beginning and 65.0 MB in the end (delta: -34.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:37,001 INFO L168 Benchmark]: Witness Printer took 91.08 ms. Allocated memory is still 83.9 MB. Free memory was 65.0 MB in the beginning and 63.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:07:37,003 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 62.9 MB. Free memory is still 42.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.73 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 44.5 MB in the end (delta: -2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.75 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 42.9 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.38 ms. Allocated memory is still 62.9 MB. Free memory was 42.9 MB in the beginning and 41.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5573.41 ms. Allocated memory is still 62.9 MB. Free memory was 41.5 MB in the beginning and 31.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9828.03 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 30.7 MB in the beginning and 65.0 MB in the end (delta: -34.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. * Witness Printer took 91.08 ms. Allocated memory is still 83.9 MB. Free memory was 65.0 MB in the beginning and 63.0 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=3.141590118408203] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=3.141590118408203] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=3.141590118408203] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=3.141590118408203] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=3.141590118408203] [L12] COND TRUE !(cond) VAL [pi=3.141590118408203] [L12] reach_error() VAL [pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9690.4ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 11.7ms, AutomataDifference: 5606.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5342.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.4ms SsaConstructionTime, 1731.3ms SatisfiabilityAnalysisTime, 453.1ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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! [2021-10-21 19:07:37,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddee71d4-d559-4a47-876b-181d5353c89b/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...