./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.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_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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 573aabe1a1502adb4c5e6135ed8c30ce3759c991 .......................................................................................................................................................................................................................................................................................... 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_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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 573aabe1a1502adb4c5e6135ed8c30ce3759c991 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:48:45,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:48:45,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:48:45,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:48:45,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:48:45,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:48:45,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:48:46,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:48:46,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:48:46,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:48:46,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:48:46,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:48:46,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:48:46,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:48:46,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:48:46,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:48:46,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:48:46,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:48:46,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:48:46,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:48:46,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:48:46,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:48:46,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:48:46,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:48:46,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:48:46,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:48:46,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:48:46,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:48:46,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:48:46,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:48:46,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:48:46,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:48:46,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:48:46,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:48:46,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:48:46,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:48:46,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:48:46,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:48:46,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:48:46,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:48:46,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:48:46,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:48:46,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:48:46,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:48:46,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:48:46,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:48:46,103 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:48:46,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:48:46,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:48:46,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:48:46,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:48:46,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:48:46,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:48:46,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:48:46,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:48:46,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:48:46,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:48:46,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:48:46,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:48:46,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:48:46,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:48:46,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:48:46,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:48:46,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:48:46,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:48:46,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:48:46,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:48:46,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:48:46,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:48:46,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:48:46,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:48:46,109 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_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573aabe1a1502adb4c5e6135ed8c30ce3759c991 [2020-11-29 20:48:46,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:48:46,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:48:46,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:48:46,433 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:48:46,437 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:48:46,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-29 20:48:46,502 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/29e0c973d/05aefd71ccfc4c0f8adcf81083fc3004/FLAG261bc4bc5 [2020-11-29 20:48:46,941 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:48:46,942 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-29 20:48:46,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/29e0c973d/05aefd71ccfc4c0f8adcf81083fc3004/FLAG261bc4bc5 [2020-11-29 20:48:47,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/29e0c973d/05aefd71ccfc4c0f8adcf81083fc3004 [2020-11-29 20:48:47,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:48:47,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:48:47,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:47,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:48:47,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:48:47,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413daccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47, skipping insertion in model container [2020-11-29 20:48:47,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:48:47,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:48:47,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:47,533 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:48:47,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:47,570 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:48:47,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47 WrapperNode [2020-11-29 20:48:47,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:47,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:47,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:48:47,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:48:47,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:47,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:48:47,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:48:47,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:48:47,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... [2020-11-29 20:48:47,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:48:47,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:48:47,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:48:47,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:48:47,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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 20:48:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:48:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:48:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:48:47,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:48:47,980 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:48:47,980 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-29 20:48:47,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:47 BoogieIcfgContainer [2020-11-29 20:48:47,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:48:47,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:48:47,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:48:47,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:48:47,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:48:47" (1/3) ... [2020-11-29 20:48:48,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f28662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:48:47, skipping insertion in model container [2020-11-29 20:48:48,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:47" (2/3) ... [2020-11-29 20:48:48,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f28662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:48:48, skipping insertion in model container [2020-11-29 20:48:48,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:47" (3/3) ... [2020-11-29 20:48:48,002 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2020-11-29 20:48:48,012 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:48:48,015 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 20:48:48,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 20:48:48,074 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:48:48,074 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:48:48,074 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:48:48,074 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:48:48,075 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:48:48,075 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:48:48,075 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:48:48,075 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:48:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-29 20:48:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:48:48,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:48,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:48:48,096 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:48,102 INFO L82 PathProgramCache]: Analyzing trace with hash 891015143, now seen corresponding path program 1 times [2020-11-29 20:48:48,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:48,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460798671] [2020-11-29 20:48:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:48:48,314 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 20:48:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460798671] [2020-11-29 20:48:48,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:48:48,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:48:48,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669010129] [2020-11-29 20:48:48,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:48:48,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:48:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:48:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:48:48,342 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-29 20:48:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:48:48,369 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-11-29 20:48:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:48:48,370 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 20:48:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:48:48,384 INFO L225 Difference]: With dead ends: 62 [2020-11-29 20:48:48,385 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 20:48:48,397 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 20:48:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 20:48:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 20:48:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:48:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 20:48:48,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-11-29 20:48:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:48:48,438 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 20:48:48,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:48:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 20:48:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:48:48,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:48:48,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:48:48,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:48:48,441 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:48:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:48:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 20:48:48,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:48:48,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642418617] [2020-11-29 20:48:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:48:48,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:48:48,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976619958] [2020-11-29 20:48:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:48:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:48:48,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:48:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:48:48,587 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:48:48,607 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:48:48,607 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:48:48,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 20:48:48,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:48:48 BoogieIcfgContainer [2020-11-29 20:48:48,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:48:48,867 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:48:48,867 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:48:48,868 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:48:48,868 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:48:47" (3/4) ... [2020-11-29 20:48:48,871 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:48:48,871 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:48:48,875 INFO L168 Benchmark]: Toolchain (without parser) took 1541.16 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 37.5 MB in the beginning and 52.6 MB in the end (delta: -15.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:48,876 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory is still 53.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:48,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.59 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 37.3 MB in the beginning and 71.1 MB in the end (delta: -33.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:48,878 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.64 ms. Allocated memory is still 94.4 MB. Free memory was 71.1 MB in the beginning and 69.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:48,879 INFO L168 Benchmark]: Boogie Preprocessor took 25.25 ms. Allocated memory is still 94.4 MB. Free memory was 69.2 MB in the beginning and 68.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:48,879 INFO L168 Benchmark]: RCFGBuilder took 340.84 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 53.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:48:48,880 INFO L168 Benchmark]: TraceAbstraction took 882.44 ms. Allocated memory is still 94.4 MB. Free memory was 53.7 MB in the beginning and 52.9 MB in the end (delta: 734.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:48,880 INFO L168 Benchmark]: Witness Printer took 4.21 ms. Allocated memory is still 94.4 MB. Free memory was 52.9 MB in the beginning and 52.6 MB in the end (delta: 367.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:48:48,884 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory is still 53.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.59 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 37.3 MB in the beginning and 71.1 MB in the end (delta: -33.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.64 ms. Allocated memory is still 94.4 MB. Free memory was 71.1 MB in the beginning and 69.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.25 ms. Allocated memory is still 94.4 MB. Free memory was 69.2 MB in the beginning and 68.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 340.84 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 53.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 882.44 ms. Allocated memory is still 94.4 MB. Free memory was 53.7 MB in the beginning and 52.9 MB in the end (delta: 734.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.21 ms. Allocated memory is still 94.4 MB. Free memory was 52.9 MB in the beginning and 52.6 MB in the end (delta: 367.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire2.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 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=32occurred 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 20:48:51,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:48:51,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:48:51,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:48:51,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:48:51,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:48:51,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:48:51,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:48:51,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:48:51,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:48:51,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:48:51,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:48:51,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:48:51,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:48:51,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:48:51,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:48:51,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:48:51,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:48:51,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:48:51,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:48:51,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:48:51,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:48:51,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:48:51,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:48:51,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:48:51,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:48:51,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:48:51,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:48:51,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:48:51,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:48:51,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:48:51,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:48:51,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:48:51,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:48:51,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:48:51,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:48:51,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:48:51,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:48:51,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:48:51,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:48:51,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:48:51,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 20:48:51,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:48:51,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:48:51,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:48:51,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:48:51,471 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:48:51,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:48:51,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:48:51,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:48:51,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:48:51,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:48:51,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:48:51,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:48:51,474 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 20:48:51,474 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 20:48:51,474 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:48:51,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:48:51,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:48:51,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:48:51,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:48:51,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:48:51,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:48:51,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:48:51,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:48:51,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:48:51,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:48:51,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:48:51,477 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 20:48:51,477 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 20:48:51,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:48:51,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:48:51,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 20:48:51,478 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_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573aabe1a1502adb4c5e6135ed8c30ce3759c991 [2020-11-29 20:48:51,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:48:51,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:48:51,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:48:51,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:48:51,928 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:48:51,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-29 20:48:52,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/a985ea918/af183fadcc7d4a0a8ab55011d18bfeb7/FLAG01c31481b [2020-11-29 20:48:52,465 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:48:52,466 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound2.c [2020-11-29 20:48:52,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/a985ea918/af183fadcc7d4a0a8ab55011d18bfeb7/FLAG01c31481b [2020-11-29 20:48:52,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/data/a985ea918/af183fadcc7d4a0a8ab55011d18bfeb7 [2020-11-29 20:48:52,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:48:52,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:48:52,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:52,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:48:52,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:48:52,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:52" (1/1) ... [2020-11-29 20:48:52,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e60ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:52, skipping insertion in model container [2020-11-29 20:48:52,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:48:52" (1/1) ... [2020-11-29 20:48:52,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:48:52,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:48:53,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:53,106 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:48:53,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:48:53,147 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:48:53,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53 WrapperNode [2020-11-29 20:48:53,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:48:53,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:53,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:48:53,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:48:53,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:48:53,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:48:53,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:48:53,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:48:53,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... [2020-11-29 20:48:53,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:48:53,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:48:53,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:48:53,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:48:53,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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 20:48:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 20:48:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:48:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:48:53,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:49:03,462 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:49:03,462 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-29 20:49:03,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:49:03 BoogieIcfgContainer [2020-11-29 20:49:03,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:49:03,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:49:03,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:49:03,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:49:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:48:52" (1/3) ... [2020-11-29 20:49:03,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4d7b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:49:03, skipping insertion in model container [2020-11-29 20:49:03,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:48:53" (2/3) ... [2020-11-29 20:49:03,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4d7b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:49:03, skipping insertion in model container [2020-11-29 20:49:03,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:49:03" (3/3) ... [2020-11-29 20:49:03,472 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound2.c [2020-11-29 20:49:03,482 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:49:03,489 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 20:49:03,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 20:49:03,521 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:49:03,521 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:49:03,521 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:49:03,521 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:49:03,521 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:49:03,522 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:49:03,522 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:49:03,522 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:49:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-29 20:49:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:49:03,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:03,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:49:03,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:49:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:03,550 INFO L82 PathProgramCache]: Analyzing trace with hash 891015143, now seen corresponding path program 1 times [2020-11-29 20:49:03,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:49:03,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983862776] [2020-11-29 20:49:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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 20:49:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 20:49:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:03,749 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 20:49:03,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:49:03,752 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 20:49:03,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983862776] [2020-11-29 20:49:03,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:03,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 20:49:03,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155036296] [2020-11-29 20:49:03,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:49:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:49:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:49:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:49:03,777 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-29 20:49:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:03,799 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-11-29 20:49:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:49:03,801 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 20:49:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:03,819 INFO L225 Difference]: With dead ends: 62 [2020-11-29 20:49:03,819 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 20:49:03,822 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 20:49:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 20:49:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 20:49:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:49:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 20:49:03,863 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2020-11-29 20:49:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:03,863 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 20:49:03,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:49:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 20:49:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:49:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:03,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:49:04,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 20:49:04,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:49:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 20:49:04,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:49:04,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486645833] [2020-11-29 20:49:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/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 20:49:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:49:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:04,315 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 20:49:04,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:49:07,692 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-29 20:49:07,712 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 20:49:07,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486645833] [2020-11-29 20:49:07,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:07,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-29 20:49:07,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581721736] [2020-11-29 20:49:07,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:49:07,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:49:07,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:49:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:49:07,716 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-11-29 20:49:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:28,355 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-11-29 20:49:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:49:28,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-11-29 20:49:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:28,357 INFO L225 Difference]: With dead ends: 47 [2020-11-29 20:49:28,357 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 20:49:28,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:49:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 20:49:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-11-29 20:49:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 20:49:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-29 20:49:28,366 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2020-11-29 20:49:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:28,367 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-29 20:49:28,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:49:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-29 20:49:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 20:49:28,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:28,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:28,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 20:49:28,588 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:49:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:28,589 INFO L82 PathProgramCache]: Analyzing trace with hash 179688749, now seen corresponding path program 1 times [2020-11-29 20:49:28,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:49:28,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108937067] [2020-11-29 20:49:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-29 20:49:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:49:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:29,866 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-11-29 20:49:30,680 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 20:49:30,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:49:44,578 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 22 [2020-11-29 20:49:54,328 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-11-29 20:49:54,330 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 20:49:54,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108937067] [2020-11-29 20:49:54,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:54,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-29 20:49:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818247858] [2020-11-29 20:49:54,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:49:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:49:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:49:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=40, Unknown=2, NotChecked=0, Total=56 [2020-11-29 20:49:54,332 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-11-29 20:50:04,558 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 14 [2020-11-29 20:50:08,994 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~a~0_11 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) v_ULTIMATE.start_main_~a~0_11))) (fp.sub c_currentRoundingMode .cse0 .cse0))) (_ bv0 32))) (= (_ bv1 32) c_ULTIMATE.start_main_~r~0) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse1 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2020-11-29 20:50:19,963 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-29 20:50:35,693 WARN L193 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 34 [2020-11-29 20:50:58,800 WARN L193 SmtUtils]: Spent 14.36 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-11-29 20:51:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:51:50,723 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-11-29 20:51:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:51:50,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-29 20:51:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:51:50,749 INFO L225 Difference]: With dead ends: 42 [2020-11-29 20:51:50,749 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 20:51:50,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.5s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=4, NotChecked=22, Total=182 [2020-11-29 20:51:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 20:51:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-11-29 20:51:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 20:51:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-29 20:51:50,760 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-11-29 20:51:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:51:50,760 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-29 20:51:50,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:51:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-29 20:51:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 20:51:50,761 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:51:50,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:51:50,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 20:51:50,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:51:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:51:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1251711063, now seen corresponding path program 1 times [2020-11-29 20:51:50,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:51:50,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231658655] [2020-11-29 20:51:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 20:51:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:51:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:51:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:51:51,395 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 20:51:51,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:51:51,426 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 20:51:51,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231658655] [2020-11-29 20:51:51,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:51:51,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-29 20:51:51,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657857171] [2020-11-29 20:51:51,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:51:51,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:51:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:51:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:51:51,428 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2020-11-29 20:51:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:51:52,635 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-11-29 20:51:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:51:52,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-29 20:51:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:51:52,637 INFO L225 Difference]: With dead ends: 64 [2020-11-29 20:51:52,637 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 20:51:52,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:51:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 20:51:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-11-29 20:51:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 20:51:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-11-29 20:51:52,661 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2020-11-29 20:51:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:51:52,661 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-11-29 20:51:52,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:51:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-11-29 20:51:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:51:52,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:51:52,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:51:52,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 20:51:52,865 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:51:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:51:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash 882382672, now seen corresponding path program 1 times [2020-11-29 20:51:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:51:52,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611611746] [2020-11-29 20:51:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-29 20:51:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:51:54,387 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:52:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:52:59,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:52:59,545 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 20:52:59,545 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:52:59,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 20:52:59,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:52:59 BoogieIcfgContainer [2020-11-29 20:52:59,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:52:59,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:52:59,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:52:59,772 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:52:59,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:49:03" (3/4) ... [2020-11-29 20:52:59,775 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:52:59,814 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cc955000-aab6-4dd0-9ffd-bcf40c917bcb/bin/uautomizer/witness.graphml [2020-11-29 20:52:59,814 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:52:59,815 INFO L168 Benchmark]: Toolchain (without parser) took 246953.91 ms. Allocated memory is still 75.5 MB. Free memory was 52.6 MB in the beginning and 44.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:52:59,815 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 35.5 MB in the beginning and 35.5 MB in the end (delta: 35.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:52:59,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.46 ms. Allocated memory is still 75.5 MB. Free memory was 52.3 MB in the beginning and 41.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:52:59,817 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.33 ms. Allocated memory is still 75.5 MB. Free memory was 41.3 MB in the beginning and 58.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:52:59,817 INFO L168 Benchmark]: Boogie Preprocessor took 68.52 ms. Allocated memory is still 75.5 MB. Free memory was 58.6 MB in the beginning and 57.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:52:59,818 INFO L168 Benchmark]: RCFGBuilder took 10143.61 ms. Allocated memory is still 75.5 MB. Free memory was 57.0 MB in the beginning and 41.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:52:59,818 INFO L168 Benchmark]: TraceAbstraction took 236305.85 ms. Allocated memory is still 75.5 MB. Free memory was 41.2 MB in the beginning and 46.6 MB in the end (delta: -5.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:52:59,819 INFO L168 Benchmark]: Witness Printer took 41.83 ms. Allocated memory is still 75.5 MB. Free memory was 46.6 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:52:59,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 54.5 MB. Free memory was 35.5 MB in the beginning and 35.5 MB in the end (delta: 35.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.46 ms. Allocated memory is still 75.5 MB. Free memory was 52.3 MB in the beginning and 41.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.33 ms. Allocated memory is still 75.5 MB. Free memory was 41.3 MB in the beginning and 58.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.52 ms. Allocated memory is still 75.5 MB. Free memory was 58.6 MB in the beginning and 57.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 10143.61 ms. Allocated memory is still 75.5 MB. Free memory was 57.0 MB in the beginning and 41.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 236305.85 ms. Allocated memory is still 75.5 MB. Free memory was 41.2 MB in the beginning and 46.6 MB in the end (delta: -5.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 41.83 ms. Allocated memory is still 75.5 MB. Free memory was 46.6 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire2.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 236.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 138.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 110 SDslu, 193 SDs, 0 SdLazy, 123 SolverSat, 40 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 80.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 83.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, 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, 4 MinimizatonAttempts, 32 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 28.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 2130 SizeOfPredicates, 11 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...