./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_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 07:42:37,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:42:37,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:42:37,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:42:37,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:42:37,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:42:37,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:42:37,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:42:37,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:42:37,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:42:37,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:42:37,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:42:37,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:42:37,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:42:37,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:42:37,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:42:37,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:42:37,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:42:37,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:42:37,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:42:37,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:42:37,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:42:37,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:42:37,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:42:37,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:42:37,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:42:37,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:42:37,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:42:37,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:42:37,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:42:37,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:42:37,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:42:37,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:42:37,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:42:37,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:42:37,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:42:37,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:42:37,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:42:37,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:42:37,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:42:37,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:42:37,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:42:37,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:42:37,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:42:37,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:42:37,674 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:42:37,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:42:37,674 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:42:37,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:42:37,674 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:42:37,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:42:37,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:42:37,675 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:42:37,675 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:42:37,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:42:37,676 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:42:37,676 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:42:37,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:42:37,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:42:37,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:42:37,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:42:37,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:42:37,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:42:37,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:42:37,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:42:37,678 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:42:37,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:42:37,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:42:37,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:42:37,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:42:37,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:42:37,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:42:37,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:42:37,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:37,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:42:37,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:42:37,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:42:37,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:42:37,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:42:37,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:42:37,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:42:37,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:42:37,682 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dacfff1df47384cb34732aaccc92e124340010c [2020-11-28 07:42:37,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:42:37,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:42:37,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:42:37,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:42:37,995 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:42:37,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c [2020-11-28 07:42:38,078 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/data/51f8ff4f6/19f6f9930cd748ed87ca297fa1292c40/FLAGe07ad6bd9 [2020-11-28 07:42:38,614 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:42:38,615 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound20.c [2020-11-28 07:42:38,621 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/data/51f8ff4f6/19f6f9930cd748ed87ca297fa1292c40/FLAGe07ad6bd9 [2020-11-28 07:42:38,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/data/51f8ff4f6/19f6f9930cd748ed87ca297fa1292c40 [2020-11-28 07:42:38,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:42:38,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:42:38,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:38,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:42:39,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:42:39,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:38" (1/1) ... [2020-11-28 07:42:39,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb44a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39, skipping insertion in model container [2020-11-28 07:42:39,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:38" (1/1) ... [2020-11-28 07:42:39,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:42:39,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:42:39,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:39,307 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:42:39,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:39,369 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:42:39,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39 WrapperNode [2020-11-28 07:42:39,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:39,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:39,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:42:39,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:42:39,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:39,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:42:39,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:42:39,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:42:39,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... [2020-11-28 07:42:39,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:42:39,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:42:39,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:42:39,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:42:39,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:42:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:42:39,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:42:39,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:42:39,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:42:39,965 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 07:42:39,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:39 BoogieIcfgContainer [2020-11-28 07:42:39,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:42:39,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:42:39,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:42:39,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:42:39,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:42:38" (1/3) ... [2020-11-28 07:42:39,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428180c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:39, skipping insertion in model container [2020-11-28 07:42:39,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:39" (2/3) ... [2020-11-28 07:42:39,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428180c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:39, skipping insertion in model container [2020-11-28 07:42:39,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:39" (3/3) ... [2020-11-28 07:42:39,998 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound20.c [2020-11-28 07:42:40,018 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:42:40,023 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:42:40,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:42:40,092 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:42:40,093 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:42:40,093 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:42:40,093 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:42:40,094 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:42:40,094 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:42:40,094 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:42:40,094 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:42:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-28 07:42:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:42:40,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:40,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:42:40,116 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash 73178710, now seen corresponding path program 1 times [2020-11-28 07:42:40,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:40,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302448844] [2020-11-28 07:42:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:40,280 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:42:40,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203409560] [2020-11-28 07:42:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/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 07:42:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:42:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:42:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:40,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:42:40,538 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:42:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:40,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302448844] [2020-11-28 07:42:40,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:40,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203409560] [2020-11-28 07:42:40,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:40,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:42:40,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111442951] [2020-11-28 07:42:40,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:42:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:42:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:42:40,600 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2020-11-28 07:42:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:40,734 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2020-11-28 07:42:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:42:40,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:42:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:40,743 INFO L225 Difference]: With dead ends: 30 [2020-11-28 07:42:40,744 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:42:40,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:42:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:42:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:42:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:42:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:42:40,776 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2020-11-28 07:42:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:40,777 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:42:40,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:42:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:42:40,777 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:42:41,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:42:41,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:42:41,120 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:42:41,120 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2020-11-28 07:42:41,121 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:42:41,121 INFO L270 CegarLoopResult]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0)) (and (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond))) [2020-11-28 07:42:41,121 INFO L274 CegarLoopResult]: For program point L27-4(lines 27 36) no Hoare annotation was computed. [2020-11-28 07:42:41,121 INFO L274 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-11-28 07:42:41,122 INFO L274 CegarLoopResult]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2020-11-28 07:42:41,122 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:42:41,122 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:42:41,122 INFO L274 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-11-28 07:42:41,122 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 07:42:41,122 INFO L274 CegarLoopResult]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2020-11-28 07:42:41,123 INFO L270 CegarLoopResult]: At program point L10-3(lines 9 15) 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 07:42:41,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:42:41 BoogieIcfgContainer [2020-11-28 07:42:41,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:42:41,141 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:42:41,141 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:42:41,160 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:42:41,161 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:39" (3/4) ... [2020-11-28 07:42:41,164 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:42:41,180 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:42:41,181 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:42:41,181 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:42:41,181 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:42:41,226 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_98f2dc6b-f64e-4460-84fe-1c81ca5a57eb/bin/utaipan/witness.graphml [2020-11-28 07:42:41,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:42:41,228 INFO L168 Benchmark]: Toolchain (without parser) took 2234.66 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 104.2 MB in the end (delta: -3.0 MB). Peak memory consumption was 54.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:41,229 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 54.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:41,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.51 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 105.5 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:41,231 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.41 ms. Allocated memory is still 127.9 MB. Free memory was 105.5 MB in the beginning and 103.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:41,231 INFO L168 Benchmark]: Boogie Preprocessor took 26.06 ms. Allocated memory is still 127.9 MB. Free memory was 103.9 MB in the beginning and 102.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:41,232 INFO L168 Benchmark]: RCFGBuilder took 508.21 ms. Allocated memory is still 127.9 MB. Free memory was 102.8 MB in the beginning and 88.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:41,233 INFO L168 Benchmark]: TraceAbstraction took 1162.81 ms. Allocated memory is still 127.9 MB. Free memory was 88.7 MB in the beginning and 49.9 MB in the end (delta: 38.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:41,234 INFO L168 Benchmark]: Witness Printer took 85.76 ms. Allocated memory is still 127.9 MB. Free memory was 49.8 MB in the beginning and 104.2 MB in the end (delta: -54.3 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:41,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 54.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 375.51 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 105.5 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.41 ms. Allocated memory is still 127.9 MB. Free memory was 105.5 MB in the beginning and 103.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.06 ms. Allocated memory is still 127.9 MB. Free memory was 103.9 MB in the beginning and 102.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 508.21 ms. Allocated memory is still 127.9 MB. Free memory was 102.8 MB in the beginning and 88.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1162.81 ms. Allocated memory is still 127.9 MB. Free memory was 88.7 MB in the beginning and 49.9 MB in the end (delta: 38.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Witness Printer took 85.76 ms. Allocated memory is still 127.9 MB. Free memory was 49.8 MB in the beginning and 104.2 MB in the end (delta: -54.3 MB). Peak memory consumption was 5.8 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 <= cond && x * 2 == y * y + y - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || (y + y * y == 2 * x && 1 <= cond) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 <= cond && x * 2 == y * y + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 22 SDslu, 7 SDs, 0 SdLazy, 12 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 9 NumberOfFragments, 47 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 4 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...