./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square_int.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square_int.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba8acdf434ba605da81b4b94488025a77c80baa5 ................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square_int.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba8acdf434ba605da81b4b94488025a77c80baa5 ..................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:24:37,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:24:37,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:24:37,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:24:37,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:24:37,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:24:37,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:24:37,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:24:37,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:24:37,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:24:37,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:24:37,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:24:37,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:24:37,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:24:37,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:24:37,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:24:37,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:24:37,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:24:37,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:24:37,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:24:37,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:24:37,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:24:37,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:24:37,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:24:37,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:24:37,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:24:37,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:24:37,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:24:37,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:24:37,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:24:37,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:24:37,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:24:37,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:24:37,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:24:37,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:24:37,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:24:37,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:24:37,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:24:37,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:24:37,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:24:37,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:24:37,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:24:37,458 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:24:37,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:24:37,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:24:37,459 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:24:37,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:24:37,460 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:24:37,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:24:37,460 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:24:37,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:24:37,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:24:37,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:24:37,461 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:24:37,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:24:37,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:24:37,462 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:24:37,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:24:37,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:24:37,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:24:37,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:24:37,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:24:37,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:24:37,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:24:37,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:24:37,464 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:24:37,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:24:37,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:24:37,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:24:37,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:24:37,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:24:37,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:24:37,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:24:37,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:37,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:24:37,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:24:37,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:24:37,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:24:37,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:24:37,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:24:37,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:24:37,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:24:37,468 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-11-28 07:24:37,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:24:37,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:24:37,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:24:37,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:24:37,715 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:24:37,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/../../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-28 07:24:37,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/7c9673bbb/dca334fe094f4da5b8544cd5a130d601/FLAGd8468eeed [2020-11-28 07:24:38,203 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:24:38,204 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-28 07:24:38,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/7c9673bbb/dca334fe094f4da5b8544cd5a130d601/FLAGd8468eeed [2020-11-28 07:24:38,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/7c9673bbb/dca334fe094f4da5b8544cd5a130d601 [2020-11-28 07:24:38,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:24:38,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:24:38,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:38,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:24:38,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:24:38,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f729d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38, skipping insertion in model container [2020-11-28 07:24:38,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:24:38,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:24:38,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:38,842 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:24:38,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:38,869 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:24:38,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38 WrapperNode [2020-11-28 07:24:38,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:38,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:38,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:24:38,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:24:38,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:38,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:24:38,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:24:38,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:24:38,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... [2020-11-28 07:24:38,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:24:38,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:24:38,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:24:38,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:24:38,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:24:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:24:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:24:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:24:39,331 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:24:39,331 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 07:24:39,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:39 BoogieIcfgContainer [2020-11-28 07:24:39,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:24:39,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:24:39,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:24:39,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:24:39,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:24:38" (1/3) ... [2020-11-28 07:24:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0602ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:39, skipping insertion in model container [2020-11-28 07:24:39,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:38" (2/3) ... [2020-11-28 07:24:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0602ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:39, skipping insertion in model container [2020-11-28 07:24:39,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:39" (3/3) ... [2020-11-28 07:24:39,342 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-11-28 07:24:39,353 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:24:39,356 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:24:39,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:24:39,397 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:24:39,398 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:24:39,398 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:24:39,398 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:24:39,398 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:24:39,398 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:24:39,399 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:24:39,399 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:24:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-28 07:24:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:24:39,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:39,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:24:39,416 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash 60929, now seen corresponding path program 1 times [2020-11-28 07:24:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:39,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119179830] [2020-11-28 07:24:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:24:39,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:24:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:24:39,547 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:24:39,567 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:24:39,567 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:24:39,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:24:39,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:24:39 BoogieIcfgContainer [2020-11-28 07:24:39,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:24:39,586 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:24:39,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:24:39,587 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:24:39,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:39" (3/4) ... [2020-11-28 07:24:39,590 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:24:39,590 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:24:39,592 INFO L168 Benchmark]: Toolchain (without parser) took 975.62 ms. Allocated memory is still 121.6 MB. Free memory was 92.8 MB in the beginning and 69.2 MB in the end (delta: 23.6 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:39,593 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory was 45.9 MB in the beginning and 45.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:39,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.85 ms. Allocated memory is still 121.6 MB. Free memory was 92.5 MB in the beginning and 99.0 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:39,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.39 ms. Allocated memory is still 121.6 MB. Free memory was 99.0 MB in the beginning and 97.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:39,596 INFO L168 Benchmark]: Boogie Preprocessor took 16.77 ms. Allocated memory is still 121.6 MB. Free memory was 97.4 MB in the beginning and 96.4 MB in the end (delta: 979.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:39,597 INFO L168 Benchmark]: RCFGBuilder took 415.77 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:39,598 INFO L168 Benchmark]: TraceAbstraction took 250.55 ms. Allocated memory is still 121.6 MB. Free memory was 81.3 MB in the beginning and 69.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:39,599 INFO L168 Benchmark]: Witness Printer took 3.87 ms. Allocated memory is still 121.6 MB. Free memory was 69.7 MB in the beginning and 69.2 MB in the end (delta: 481.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:39,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory was 45.9 MB in the beginning and 45.8 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 241.85 ms. Allocated memory is still 121.6 MB. Free memory was 92.5 MB in the beginning and 99.0 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.39 ms. Allocated memory is still 121.6 MB. Free memory was 99.0 MB in the beginning and 97.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.77 ms. Allocated memory is still 121.6 MB. Free memory was 97.4 MB in the beginning and 96.4 MB in the end (delta: 979.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 415.77 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 250.55 ms. Allocated memory is still 121.6 MB. Free memory was 81.3 MB in the beginning and 69.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.87 ms. Allocated memory is still 121.6 MB. Free memory was 69.7 MB in the beginning and 69.2 MB in the end (delta: 481.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square_int.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:24:41,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:24:41,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:24:41,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:24:42,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:24:42,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:24:42,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:24:42,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:24:42,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:24:42,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:24:42,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:24:42,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:24:42,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:24:42,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:24:42,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:24:42,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:24:42,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:24:42,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:24:42,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:24:42,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:24:42,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:24:42,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:24:42,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:24:42,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:24:42,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:24:42,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:24:42,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:24:42,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:24:42,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:24:42,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:24:42,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:24:42,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:24:42,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:24:42,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:24:42,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:24:42,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:24:42,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:24:42,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:24:42,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:24:42,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:24:42,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:24:42,096 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:24:42,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:24:42,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:24:42,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:24:42,144 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:24:42,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:24:42,144 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:24:42,144 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:24:42,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:24:42,145 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:24:42,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:24:42,148 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:24:42,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:24:42,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:24:42,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:24:42,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:24:42,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:24:42,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:24:42,149 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:24:42,149 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:24:42,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:24:42,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:24:42,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:24:42,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:24:42,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:24:42,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:24:42,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:24:42,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:24:42,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:42,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:24:42,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:24:42,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:24:42,152 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:24:42,153 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:24:42,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:24:42,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:24:42,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:24:42,154 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-11-28 07:24:42,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:24:42,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:24:42,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:24:42,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:24:42,572 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:24:42,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/../../sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-28 07:24:42,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/9971d43a3/66b5b12e9fd040de829b52c795697165/FLAGd176b2d50 [2020-11-28 07:24:43,125 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:24:43,127 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/sv-benchmarks/c/float-benchs/inv_square_int.c [2020-11-28 07:24:43,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/9971d43a3/66b5b12e9fd040de829b52c795697165/FLAGd176b2d50 [2020-11-28 07:24:43,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/data/9971d43a3/66b5b12e9fd040de829b52c795697165 [2020-11-28 07:24:43,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:24:43,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:24:43,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:43,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:24:43,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:24:43,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7a3130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43, skipping insertion in model container [2020-11-28 07:24:43,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:24:43,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:24:43,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:43,689 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:24:43,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:43,720 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:24:43,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43 WrapperNode [2020-11-28 07:24:43,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:43,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:43,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:24:43,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:24:43,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:43,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:24:43,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:24:43,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:24:43,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... [2020-11-28 07:24:43,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:24:43,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:24:43,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:24:43,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:24:43,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:24:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:24:43,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:24:43,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:24:45,508 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:24:45,508 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 07:24:45,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:45 BoogieIcfgContainer [2020-11-28 07:24:45,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:24:45,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:24:45,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:24:45,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:24:45,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:24:43" (1/3) ... [2020-11-28 07:24:45,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e1bf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:45, skipping insertion in model container [2020-11-28 07:24:45,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:43" (2/3) ... [2020-11-28 07:24:45,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e1bf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:45, skipping insertion in model container [2020-11-28 07:24:45,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:45" (3/3) ... [2020-11-28 07:24:45,539 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-11-28 07:24:45,549 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:24:45,553 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:24:45,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:24:45,586 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:24:45,586 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:24:45,587 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:24:45,587 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:24:45,587 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:24:45,587 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:24:45,587 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:24:45,587 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:24:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 07:24:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:24:45,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:45,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:24:45,603 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-28 07:24:45,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:24:45,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238587658] [2020-11-28 07:24:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-28 07:24:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 07:24:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:45,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:45,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238587658] [2020-11-28 07:24:45,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:45,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:24:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33896753] [2020-11-28 07:24:45,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:24:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:24:45,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:24:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:24:45,872 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-28 07:24:45,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:45,886 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-28 07:24:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:24:45,887 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 07:24:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:45,895 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:24:45,895 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 07:24:45,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:24:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 07:24:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 07:24:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 07:24:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-28 07:24:45,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-28 07:24:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:45,926 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-28 07:24:45,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:24:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-28 07:24:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:24:45,927 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:45,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:24:46,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:24:46,150 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-28 07:24:46,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:24:46,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576549168] [2020-11-28 07:24:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-28 07:24:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:24:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:47,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:50,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576549168] [2020-11-28 07:24:50,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:50,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:24:50,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389839717] [2020-11-28 07:24:50,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:50,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:24:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:50,330 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-11-28 07:24:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:50,637 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-11-28 07:24:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:24:50,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-28 07:24:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:50,637 INFO L225 Difference]: With dead ends: 7 [2020-11-28 07:24:50,638 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:24:50,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:24:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:24:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:24:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:24:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:24:50,639 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-11-28 07:24:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:50,639 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:24:50,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:24:50,640 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:24:50,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:24:50,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:24:50,877 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:24:50,877 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-11-28 07:24:50,877 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-28 07:24:50,877 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-28 07:24:50,877 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-11-28 07:24:50,877 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-28 07:24:50,877 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 07:24:50,878 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:24:50,878 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 07:24:50,878 INFO L277 CegarLoopResult]: At program point L26(lines 15 27) the Hoare annotation is: true [2020-11-28 07:24:50,878 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:24:50,878 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-11-28 07:24:50,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:24:50 BoogieIcfgContainer [2020-11-28 07:24:50,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:24:50,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:24:50,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:24:50,884 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:24:50,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:45" (3/4) ... [2020-11-28 07:24:50,888 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:24:50,897 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 07:24:50,897 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:24:50,897 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:24:50,897 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:24:50,930 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b4c33cbc-5de6-4560-8f1d-f69d161ffa16/bin/utaipan/witness.graphml [2020-11-28 07:24:50,930 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:24:50,936 INFO L168 Benchmark]: Toolchain (without parser) took 7427.38 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.0 MB in the beginning and 47.3 MB in the end (delta: -10.3 MB). Peak memory consumption was 726.2 kB. Max. memory is 16.1 GB. [2020-11-28 07:24:50,940 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.1 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:50,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.24 ms. Allocated memory is still 58.7 MB. Free memory was 36.8 MB in the beginning and 26.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:50,943 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.30 ms. Allocated memory is still 58.7 MB. Free memory was 26.9 MB in the beginning and 25.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:50,943 INFO L168 Benchmark]: Boogie Preprocessor took 93.61 ms. Allocated memory is still 58.7 MB. Free memory was 25.5 MB in the beginning and 41.5 MB in the end (delta: -16.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:50,944 INFO L168 Benchmark]: RCFGBuilder took 1671.87 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 30.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:50,945 INFO L168 Benchmark]: TraceAbstraction took 5360.05 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 30.2 MB in the beginning and 49.7 MB in the end (delta: -19.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:50,945 INFO L168 Benchmark]: Witness Printer took 46.34 ms. Allocated memory is still 71.3 MB. Free memory was 49.7 MB in the beginning and 47.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:50,948 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 58.7 MB. Free memory was 40.1 MB in the beginning and 40.1 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 215.24 ms. Allocated memory is still 58.7 MB. Free memory was 36.8 MB in the beginning and 26.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.30 ms. Allocated memory is still 58.7 MB. Free memory was 26.9 MB in the beginning and 25.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.61 ms. Allocated memory is still 58.7 MB. Free memory was 25.5 MB in the beginning and 41.5 MB in the end (delta: -16.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1671.87 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 30.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5360.05 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 30.2 MB in the beginning and 49.7 MB in the end (delta: -19.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 46.34 ms. Allocated memory is still 71.3 MB. Free memory was 49.7 MB in the beginning and 47.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 6 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 6 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 correct! Received shutdown request...