./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.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_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/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 0dacfff1df47384cb34732aaccc92e124340010c .................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:04:09,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:04:09,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:04:10,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:04:10,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:04:10,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:04:10,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:04:10,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:04:10,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:04:10,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:04:10,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:04:10,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:04:10,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:04:10,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:04:10,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:04:10,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:04:10,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:04:10,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:04:10,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:04:10,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:04:10,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:04:10,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:04:10,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:04:10,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:04:10,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:04:10,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:04:10,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:04:10,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:04:10,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:04:10,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:04:10,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:04:10,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:04:10,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:04:10,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:04:10,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:04:10,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:04:10,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:04:10,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:04:10,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:04:10,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:04:10,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:04:10,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:04:10,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:04:10,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:04:10,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:04:10,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:04:10,134 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:04:10,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:04:10,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:04:10,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:04:10,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:04:10,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:04:10,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:04:10,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:04:10,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:04:10,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:04:10,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:04:10,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:04:10,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:04:10,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:04:10,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:04:10,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:04:10,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:04:10,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:04:10,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:04:10,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:04:10,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:04:10,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:04:10,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:04:10,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:04:10,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:04:10,141 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_1af06865-4511-45c3-a1e5-d33eae4b1d7b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dacfff1df47384cb34732aaccc92e124340010c [2020-11-28 03:04:10,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:04:10,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:04:10,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:04:10,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:04:10,499 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:04:10,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c [2020-11-28 03:04:10,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/data/906443103/a24d72a26ec1405ea87942cc157aeb28/FLAGd72241094 [2020-11-28 03:04:11,007 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:04:11,008 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c [2020-11-28 03:04:11,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/data/906443103/a24d72a26ec1405ea87942cc157aeb28/FLAGd72241094 [2020-11-28 03:04:11,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/data/906443103/a24d72a26ec1405ea87942cc157aeb28 [2020-11-28 03:04:11,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:04:11,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:04:11,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:11,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:04:11,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:04:11,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e13d076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11, skipping insertion in model container [2020-11-28 03:04:11,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:04:11,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:04:11,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:11,743 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:04:11,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:11,784 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:04:11,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11 WrapperNode [2020-11-28 03:04:11,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:11,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:04:11,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:04:11,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:04:11,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:04:11,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:04:11,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:04:11,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:04:11,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:04:11,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:04:11,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:04:11,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:04:11,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/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 [2020-11-28 03:04:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:04:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:04:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:04:11,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:04:12,279 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:04:12,280 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 03:04:12,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:12 BoogieIcfgContainer [2020-11-28 03:04:12,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:04:12,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:04:12,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:04:12,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:04:12,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:04:11" (1/3) ... [2020-11-28 03:04:12,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb2e6f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:04:12, skipping insertion in model container [2020-11-28 03:04:12,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11" (2/3) ... [2020-11-28 03:04:12,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb2e6f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:04:12, skipping insertion in model container [2020-11-28 03:04:12,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:12" (3/3) ... [2020-11-28 03:04:12,295 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound20.c [2020-11-28 03:04:12,311 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:04:12,315 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:04:12,324 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:04:12,349 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:04:12,349 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:04:12,350 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:04:12,350 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:04:12,350 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:04:12,350 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:04:12,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:04:12,350 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:04:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-28 03:04:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 03:04:12,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:12,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:04:12,369 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:04:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-28 03:04:12,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:12,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070095925] [2020-11-28 03:04:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:12,478 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:04:12,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629089821] [2020-11-28 03:04:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/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 [2020-11-28 03:04:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:04:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:04:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:12,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070095925] [2020-11-28 03:04:12,725 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:04:12,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629089821] [2020-11-28 03:04:12,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:12,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:12,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29089406] [2020-11-28 03:04:12,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:12,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:12,752 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-28 03:04:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:12,839 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-11-28 03:04:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:04:12,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 03:04:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:12,849 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:04:12,849 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:04:12,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:04:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-11-28 03:04:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 03:04:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-28 03:04:12,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-11-28 03:04:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:12,882 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-28 03:04:12,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-28 03:04:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:04:12,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:12,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 03:04:13,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:04:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash 885278358, now seen corresponding path program 1 times [2020-11-28 03:04:13,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206218286] [2020-11-28 03:04:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,112 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:04:13,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972293176] [2020-11-28 03:04:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:04:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:04:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206218286] [2020-11-28 03:04:13,325 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:04:13,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972293176] [2020-11-28 03:04:13,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:04:13,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:04:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817905295] [2020-11-28 03:04:13,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:04:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:13,329 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-11-28 03:04:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:13,553 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-28 03:04:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:04:13,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:04:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:13,555 INFO L225 Difference]: With dead ends: 29 [2020-11-28 03:04:13,555 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:04:13,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:04:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:04:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-28 03:04:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:04:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-28 03:04:13,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-11-28 03:04:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:13,562 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-28 03:04:13,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:04:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-28 03:04:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:04:13,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:13,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-11-28 03:04:13,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:13,783 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:04:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash 542015330, now seen corresponding path program 2 times [2020-11-28 03:04:13,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457308195] [2020-11-28 03:04:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:04:13,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958370828] [2020-11-28 03:04:13,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:13,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:04:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:04:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:04:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:04:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:13,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457308195] [2020-11-28 03:04:13,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:04:13,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958370828] [2020-11-28 03:04:13,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:04:13,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 03:04:13,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357423827] [2020-11-28 03:04:13,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:04:13,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:04:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:04:13,967 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-11-28 03:04:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:14,135 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-11-28 03:04:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:04:14,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-28 03:04:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:14,137 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:04:14,138 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 03:04:14,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:04:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 03:04:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-11-28 03:04:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:04:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-28 03:04:14,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2020-11-28 03:04:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:14,148 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-28 03:04:14,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:04:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-28 03:04:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:04:14,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:14,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-11-28 03:04:14,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:14,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:04:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1463251502, now seen corresponding path program 3 times [2020-11-28 03:04:14,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:14,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016812399] [2020-11-28 03:04:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:14,366 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:04:14,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960942114] [2020-11-28 03:04:14,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:14,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:04:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:04:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:04:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:04:14,507 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:04:14,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:04:14,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:04:14,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:04:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-28 03:04:14,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016812399] [2020-11-28 03:04:14,584 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:04:14,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960942114] [2020-11-28 03:04:14,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:04:14,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:04:14,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031903673] [2020-11-28 03:04:14,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:04:14,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:14,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:14,586 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-11-28 03:04:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:16,772 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-28 03:04:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:04:16,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-28 03:04:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:16,774 INFO L225 Difference]: With dead ends: 25 [2020-11-28 03:04:16,774 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:04:16,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:04:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:04:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:04:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:04:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:04:16,775 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-11-28 03:04:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:16,775 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:04:16,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:04:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:04:16,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:04:16,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:04:16,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:04:17,085 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:04:17,085 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2020-11-28 03:04:17,085 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 03:04:17,086 INFO L270 CegarLoopResult]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (* ULTIMATE.start_main_~x~0 2) (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)))) (or (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= ULTIMATE.start_main_~y~0 0) .cse0))) [2020-11-28 03:04:17,086 INFO L274 CegarLoopResult]: For program point L27-4(lines 27 36) no Hoare annotation was computed. [2020-11-28 03:04:17,086 INFO L274 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-11-28 03:04:17,086 INFO L274 CegarLoopResult]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2020-11-28 03:04:17,086 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:04:17,086 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:04:17,087 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:04:17,087 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 03:04:17,087 INFO L274 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-11-28 03:04:17,087 INFO L270 CegarLoopResult]: At program point L10-1(lines 30 31) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 2) (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))) [2020-11-28 03:04:17,087 INFO L274 CegarLoopResult]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2020-11-28 03:04:17,087 INFO L277 CegarLoopResult]: At program point L10-3(lines 9 15) the Hoare annotation is: true [2020-11-28 03:04:17,087 INFO L277 CegarLoopResult]: At program point L39(lines 18 40) the Hoare annotation is: true [2020-11-28 03:04:17,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:04:17 BoogieIcfgContainer [2020-11-28 03:04:17,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:04:17,105 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:04:17,105 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:04:17,105 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:04:17,106 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:12" (3/4) ... [2020-11-28 03:04:17,113 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:04:17,123 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:04:17,126 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:04:17,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:04:17,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:04:17,192 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1af06865-4511-45c3-a1e5-d33eae4b1d7b/bin/uautomizer/witness.graphml [2020-11-28 03:04:17,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:04:17,194 INFO L168 Benchmark]: Toolchain (without parser) took 5781.56 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 56.3 MB in the beginning and 52.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:17,200 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 83.9 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:17,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.80 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 56.0 MB in the beginning and 78.7 MB in the end (delta: -22.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:17,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.04 ms. Allocated memory is still 100.7 MB. Free memory was 78.3 MB in the beginning and 77.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:17,202 INFO L168 Benchmark]: Boogie Preprocessor took 44.95 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 76.1 MB in the end (delta: 808.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:17,203 INFO L168 Benchmark]: RCFGBuilder took 414.57 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 64.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:17,203 INFO L168 Benchmark]: TraceAbstraction took 4821.07 ms. Allocated memory is still 100.7 MB. Free memory was 64.0 MB in the beginning and 55.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:17,204 INFO L168 Benchmark]: Witness Printer took 87.72 ms. Allocated memory is still 100.7 MB. Free memory was 55.0 MB in the beginning and 52.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:17,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 83.9 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 369.80 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 56.0 MB in the beginning and 78.7 MB in the end (delta: -22.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.04 ms. Allocated memory is still 100.7 MB. Free memory was 78.3 MB in the beginning and 77.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.95 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 76.1 MB in the end (delta: 808.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 414.57 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 64.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4821.07 ms. Allocated memory is still 100.7 MB. Free memory was 64.0 MB in the beginning and 55.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. * Witness Printer took 87.72 ms. Allocated memory is still 100.7 MB. Free memory was 55.0 MB in the beginning and 52.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (1 <= cond && x * 2 == y * y + y) || (y == 0 && x * 2 == y * y + y) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 == cond && x * 2 == y * y + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 48 SDslu, 92 SDs, 0 SdLazy, 84 SolverSat, 25 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, 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, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 16 NumberOfFragments, 42 HoareAnnotationTreeSize, 4 FomulaSimplifications, 115 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 48 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 2735 SizeOfPredicates, 18 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 20/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...