./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/float_int_inv_square.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_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer --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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ........................................................................................................................................................................................................................................................................... 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_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer --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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ....................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:41:56,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:41:56,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:41:56,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:41:56,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:41:56,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:41:56,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:41:56,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:41:56,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:41:56,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:41:56,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:41:56,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:41:56,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:41:56,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:41:56,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:41:56,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:41:56,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:41:56,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:41:56,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:41:56,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:41:56,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:41:56,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:41:56,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:41:56,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:41:56,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:41:56,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:41:56,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:41:56,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:41:56,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:41:56,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:41:56,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:41:56,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:41:56,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:41:56,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:41:56,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:41:56,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:41:56,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:41:56,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:41:56,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:41:56,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:41:56,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:41:56,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:41:56,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:41:56,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:41:56,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:41:56,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:41:56,919 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:41:56,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:41:56,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:41:56,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:41:56,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:41:56,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:41:56,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:41:56,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:41:56,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:41:56,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:41:56,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:41:56,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:41:56,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:41:56,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:41:56,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:41:56,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:41:56,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:41:56,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:41:56,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:41:56,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:41:56,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:41:56,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:41:56,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:41:56,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:41:56,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:41:56,928 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-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-11-29 19:41:57,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:41:57,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:41:57,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:41:57,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:41:57,372 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:41:57,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-29 19:41:57,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/bff95f706/5400f8ac3a9c40f79d2ffec94ce38725/FLAG2c4ecba55 [2020-11-29 19:41:58,045 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:41:58,047 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-29 19:41:58,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/bff95f706/5400f8ac3a9c40f79d2ffec94ce38725/FLAG2c4ecba55 [2020-11-29 19:41:58,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/bff95f706/5400f8ac3a9c40f79d2ffec94ce38725 [2020-11-29 19:41:58,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:41:58,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:41:58,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:41:58,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:41:58,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:41:58,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b02d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58, skipping insertion in model container [2020-11-29 19:41:58,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:41:58,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:41:58,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:41:58,709 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:41:58,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:41:58,754 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:41:58,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58 WrapperNode [2020-11-29 19:41:58,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:41:58,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:41:58,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:41:58,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:41:58,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:41:58,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:41:58,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:41:58,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:41:58,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... [2020-11-29 19:41:58,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:41:58,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:41:58,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:41:58,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:41:58,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/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 [2020-11-29 19:41:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:41:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:41:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:41:58,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:41:59,199 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:41:59,200 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 19:41:59,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:41:59 BoogieIcfgContainer [2020-11-29 19:41:59,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:41:59,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:41:59,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:41:59,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:41:59,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:41:58" (1/3) ... [2020-11-29 19:41:59,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c34c67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:41:59, skipping insertion in model container [2020-11-29 19:41:59,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:41:58" (2/3) ... [2020-11-29 19:41:59,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c34c67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:41:59, skipping insertion in model container [2020-11-29 19:41:59,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:41:59" (3/3) ... [2020-11-29 19:41:59,224 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-11-29 19:41:59,253 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:41:59,257 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:41:59,281 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:41:59,322 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:41:59,322 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:41:59,322 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:41:59,322 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:41:59,322 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:41:59,323 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:41:59,323 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:41:59,323 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:41:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-29 19:41:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:41:59,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:41:59,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:41:59,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:41:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:41:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-29 19:41:59,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:41:59,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011402556] [2020-11-29 19:41:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:41:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:41:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:41:59,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011402556] [2020-11-29 19:41:59,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:41:59,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:41:59,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397141829] [2020-11-29 19:41:59,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:41:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:41:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:41:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:41:59,582 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-29 19:41:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:41:59,599 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-29 19:41:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:41:59,601 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 19:41:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:41:59,611 INFO L225 Difference]: With dead ends: 20 [2020-11-29 19:41:59,611 INFO L226 Difference]: Without dead ends: 7 [2020-11-29 19:41:59,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:41:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-29 19:41:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 19:41:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 19:41:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-29 19:41:59,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-29 19:41:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:41:59,650 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-29 19:41:59,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:41:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-29 19:41:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:41:59,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:41:59,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:41:59,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:41:59,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:41:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:41:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-29 19:41:59,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:41:59,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183073958] [2020-11-29 19:41:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:41:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:41:59,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:41:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:41:59,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:41:59,763 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:41:59,763 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:41:59,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:41:59,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:41:59 BoogieIcfgContainer [2020-11-29 19:41:59,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:41:59,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:41:59,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:41:59,809 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:41:59,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:41:59" (3/4) ... [2020-11-29 19:41:59,814 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:41:59,814 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:41:59,819 INFO L168 Benchmark]: Toolchain (without parser) took 1403.07 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 52.7 MB in the beginning and 80.2 MB in the end (delta: -27.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:41:59,820 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 83.9 MB. Free memory was 45.3 MB in the beginning and 45.2 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:41:59,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.76 ms. Allocated memory is still 83.9 MB. Free memory was 52.5 MB in the beginning and 62.4 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:59,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.47 ms. Allocated memory is still 83.9 MB. Free memory was 62.4 MB in the beginning and 60.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:59,825 INFO L168 Benchmark]: Boogie Preprocessor took 48.99 ms. Allocated memory is still 83.9 MB. Free memory was 60.8 MB in the beginning and 60.0 MB in the end (delta: 786.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:41:59,827 INFO L168 Benchmark]: RCFGBuilder took 342.11 ms. Allocated memory is still 83.9 MB. Free memory was 60.0 MB in the beginning and 49.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:59,829 INFO L168 Benchmark]: TraceAbstraction took 602.55 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.2 MB in the beginning and 80.2 MB in the end (delta: -31.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:41:59,830 INFO L168 Benchmark]: Witness Printer took 6.45 ms. Allocated memory is still 100.7 MB. Free memory is still 80.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:41:59,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 83.9 MB. Free memory was 45.3 MB in the beginning and 45.2 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.76 ms. Allocated memory is still 83.9 MB. Free memory was 52.5 MB in the beginning and 62.4 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.47 ms. Allocated memory is still 83.9 MB. Free memory was 62.4 MB in the beginning and 60.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.99 ms. Allocated memory is still 83.9 MB. Free memory was 60.8 MB in the beginning and 60.0 MB in the end (delta: 786.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 342.11 ms. Allocated memory is still 83.9 MB. Free memory was 60.0 MB in the beginning and 49.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 602.55 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.2 MB in the beginning and 80.2 MB in the end (delta: -31.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. * Witness Printer took 6.45 ms. Allocated memory is still 100.7 MB. Free memory is still 80.2 MB. 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 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2020-11-29 19:42:03,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:42:03,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:42:03,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:42:03,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:42:03,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:42:03,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:42:03,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:42:03,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:42:03,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:42:03,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:42:03,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:42:03,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:42:03,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:42:03,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:42:03,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:42:03,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:42:03,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:42:03,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:42:03,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:42:03,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:42:03,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:42:03,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:42:03,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:42:03,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:42:03,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:42:03,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:42:03,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:42:03,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:42:03,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:42:03,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:42:03,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:42:03,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:42:03,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:42:03,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:42:03,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:42:03,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:42:03,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:42:03,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:42:03,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:42:03,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:42:03,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 19:42:03,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:42:03,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:42:03,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:42:03,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:42:03,261 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:42:03,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:42:03,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:42:03,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:42:03,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:42:03,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:42:03,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:42:03,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:42:03,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:42:03,265 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:42:03,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:42:03,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:42:03,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:42:03,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:42:03,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:42:03,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:42:03,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:42:03,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:42:03,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:42:03,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:42:03,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:42:03,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:42:03,268 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:42:03,268 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:42:03,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:42:03,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:42:03,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:42:03,269 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_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-11-29 19:42:03,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:42:03,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:42:03,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:42:03,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:42:03,814 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:42:03,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-29 19:42:03,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/793aa7de5/9cdb9bcf8d514b1d874383ca2cb4e3e2/FLAG83bf74b21 [2020-11-29 19:42:04,586 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:42:04,587 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-29 19:42:04,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/793aa7de5/9cdb9bcf8d514b1d874383ca2cb4e3e2/FLAG83bf74b21 [2020-11-29 19:42:04,978 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/data/793aa7de5/9cdb9bcf8d514b1d874383ca2cb4e3e2 [2020-11-29 19:42:04,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:42:04,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:42:04,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:42:04,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:42:04,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:42:04,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:04,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350e22f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:04, skipping insertion in model container [2020-11-29 19:42:04,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:42:04" (1/1) ... [2020-11-29 19:42:05,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:42:05,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:42:05,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:42:05,248 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:42:05,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:42:05,305 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:42:05,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05 WrapperNode [2020-11-29 19:42:05,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:42:05,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:42:05,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:42:05,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:42:05,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:42:05,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:42:05,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:42:05,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:42:05,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... [2020-11-29 19:42:05,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:42:05,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:42:05,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:42:05,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:42:05,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/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 [2020-11-29 19:42:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:42:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:42:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:42:05,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:42:06,688 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:42:06,688 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 19:42:06,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:42:06 BoogieIcfgContainer [2020-11-29 19:42:06,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:42:06,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:42:06,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:42:06,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:42:06,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:42:04" (1/3) ... [2020-11-29 19:42:06,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0f388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:42:06, skipping insertion in model container [2020-11-29 19:42:06,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:42:05" (2/3) ... [2020-11-29 19:42:06,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0f388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:42:06, skipping insertion in model container [2020-11-29 19:42:06,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:42:06" (3/3) ... [2020-11-29 19:42:06,719 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-11-29 19:42:06,739 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:42:06,760 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:42:06,794 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:42:06,846 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:42:06,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:42:06,847 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:42:06,847 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:42:06,847 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:42:06,847 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:42:06,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:42:06,862 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:42:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-29 19:42:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:42:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:06,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:42:06,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-29 19:42:06,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:42:06,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151364033] [2020-11-29 19:42:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/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 [2020-11-29 19:42:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:42:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 19:42:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:42:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:07,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:42:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:42:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151364033] [2020-11-29 19:42:07,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:42:07,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 19:42:07,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736318755] [2020-11-29 19:42:07,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:42:07,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:42:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:42:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:42:07,235 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-29 19:42:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:42:07,254 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-29 19:42:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:42:07,256 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 19:42:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:42:07,279 INFO L225 Difference]: With dead ends: 20 [2020-11-29 19:42:07,284 INFO L226 Difference]: Without dead ends: 7 [2020-11-29 19:42:07,288 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 [2020-11-29 19:42:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-29 19:42:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 19:42:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 19:42:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-29 19:42:07,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-29 19:42:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:42:07,326 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-29 19:42:07,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:42:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-29 19:42:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:42:07,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:42:07,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:42:07,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:42:07,541 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:42:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:42:07,546 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-29 19:42:07,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:42:07,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750010570] [2020-11-29 19:42:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/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 [2020-11-29 19:42:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:42:07,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:42:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:42:07,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:42:07,934 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:42:07,934 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:42:08,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:42:08,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:42:08 BoogieIcfgContainer [2020-11-29 19:42:08,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:42:08,175 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:42:08,175 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:42:08,175 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:42:08,176 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:42:06" (3/4) ... [2020-11-29 19:42:08,179 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:42:08,219 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4d0fce3f-909d-4a73-85c4-dbb0bc26a2c3/bin/uautomizer/witness.graphml [2020-11-29 19:42:08,220 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:42:08,222 INFO L168 Benchmark]: Toolchain (without parser) took 3237.89 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.4 MB in the beginning and 41.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:42:08,223 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 37.1 MB in the end (delta: 33.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:42:08,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.13 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.2 MB in the beginning and 51.3 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:42:08,226 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.33 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 49.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:42:08,227 INFO L168 Benchmark]: Boogie Preprocessor took 31.98 ms. Allocated memory is still 67.1 MB. Free memory was 49.8 MB in the beginning and 48.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:42:08,228 INFO L168 Benchmark]: RCFGBuilder took 1276.71 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 37.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:42:08,228 INFO L168 Benchmark]: TraceAbstraction took 1463.53 ms. Allocated memory is still 67.1 MB. Free memory was 37.2 MB in the beginning and 43.5 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:42:08,229 INFO L168 Benchmark]: Witness Printer took 45.19 ms. Allocated memory is still 67.1 MB. Free memory was 43.5 MB in the beginning and 41.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:42:08,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 37.1 MB in the end (delta: 33.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.13 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.2 MB in the beginning and 51.3 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.33 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 49.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.98 ms. Allocated memory is still 67.1 MB. Free memory was 49.8 MB in the beginning and 48.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1276.71 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 37.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1463.53 ms. Allocated memory is still 67.1 MB. Free memory was 37.2 MB in the beginning and 43.5 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 45.19 ms. Allocated memory is still 67.1 MB. Free memory was 43.5 MB in the beginning and 41.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 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 proved your program to be incorrect! Received shutdown request...