./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.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_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/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 e96b4706a15a135b751d9dcfc9eb745ce848cd1b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:41:23,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:23,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:23,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:23,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:23,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:23,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:23,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:23,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:23,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:23,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:23,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:23,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:23,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:23,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:23,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:23,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:23,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:23,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:23,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:23,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:23,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:23,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:23,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:23,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:23,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:23,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:23,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:23,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:23,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:23,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:23,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:23,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:23,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:23,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:23,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:23,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:23,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:23,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:23,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:23,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:23,752 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:23,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:23,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:23,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:23,779 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:23,780 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:23,780 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:23,780 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:23,781 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:23,781 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:23,781 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:23,782 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:23,782 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:23,782 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:23,783 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:23,783 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:23,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:23,785 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:23,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:23,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:23,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:23,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:23,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:23,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:23,787 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:23,787 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:23,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:23,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:23,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:23,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:23,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:23,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:23,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:23,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:23,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:23,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:23,791 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:23,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:23,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:23,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:23,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:23,793 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_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96b4706a15a135b751d9dcfc9eb745ce848cd1b [2020-11-28 07:41:24,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:24,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:24,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:24,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:24,140 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:24,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2020-11-28 07:41:24,242 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/data/fc5f9d1bc/e45b4cc937f149859a5bcbf56a45f1a3/FLAG6464277ed [2020-11-28 07:41:24,871 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:24,872 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2020-11-28 07:41:24,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/data/fc5f9d1bc/e45b4cc937f149859a5bcbf56a45f1a3/FLAG6464277ed [2020-11-28 07:41:25,209 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/data/fc5f9d1bc/e45b4cc937f149859a5bcbf56a45f1a3 [2020-11-28 07:41:25,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:25,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:25,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:25,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:25,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:25,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41043025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25, skipping insertion in model container [2020-11-28 07:41:25,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:25,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:25,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:25,559 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:25,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:25,642 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:25,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25 WrapperNode [2020-11-28 07:41:25,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:25,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:25,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:25,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:25,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:25,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:25,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:25,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:25,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... [2020-11-28 07:41:25,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:25,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:25,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:25,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:25,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/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 07:41:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:25,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:27,193 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:27,193 INFO L298 CfgBuilder]: Removed 38 assume(true) statements. [2020-11-28 07:41:27,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:27 BoogieIcfgContainer [2020-11-28 07:41:27,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:27,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:27,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:27,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:27,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:25" (1/3) ... [2020-11-28 07:41:27,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bbcc5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:27, skipping insertion in model container [2020-11-28 07:41:27,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:25" (2/3) ... [2020-11-28 07:41:27,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29bbcc5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:27, skipping insertion in model container [2020-11-28 07:41:27,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:27" (3/3) ... [2020-11-28 07:41:27,211 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2020-11-28 07:41:27,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:27,238 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-28 07:41:27,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 07:41:27,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:27,297 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:27,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:27,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:27,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:27,298 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:27,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:27,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-28 07:41:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:41:27,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:27,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:41:27,332 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash 175224798, now seen corresponding path program 1 times [2020-11-28 07:41:27,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:27,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727901480] [2020-11-28 07:41:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:27,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:41:27,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374417055] [2020-11-28 07:41:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/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 07:41:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 07:41:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:27,617 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 07:41:27,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:27,621 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 07:41:27,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727901480] [2020-11-28 07:41:27,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:41:27,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374417055] [2020-11-28 07:41:27,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:27,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:41:27,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986886789] [2020-11-28 07:41:27,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:41:27,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:27,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:41:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:41:27,659 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-28 07:41:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:27,691 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-11-28 07:41:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:41:27,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:41:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:27,704 INFO L225 Difference]: With dead ends: 65 [2020-11-28 07:41:27,704 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:41:27,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:41:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:41:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-28 07:41:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 07:41:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-11-28 07:41:27,755 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2020-11-28 07:41:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:27,756 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-11-28 07:41:27,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:41:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-11-28 07:41:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:41:27,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:27,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:41:27,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:41:27,983 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:27,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1062670071, now seen corresponding path program 1 times [2020-11-28 07:41:27,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:27,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006017603] [2020-11-28 07:41:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:27,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:41:27,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967766230] [2020-11-28 07:41:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/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 07:41:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:41:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:28,132 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 07:41:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:28,147 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 07:41:28,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006017603] [2020-11-28 07:41:28,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:41:28,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967766230] [2020-11-28 07:41:28,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:28,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:41:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806874103] [2020-11-28 07:41:28,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:28,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:28,160 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-11-28 07:41:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:28,195 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-11-28 07:41:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:28,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:41:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:28,199 INFO L225 Difference]: With dead ends: 41 [2020-11-28 07:41:28,199 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 07:41:28,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 07:41:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-28 07:41:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 07:41:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-11-28 07:41:28,215 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2020-11-28 07:41:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:28,215 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-11-28 07:41:28,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-11-28 07:41:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:41:28,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:28,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:28,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:28,422 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1417266903, now seen corresponding path program 1 times [2020-11-28 07:41:28,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:28,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883142930] [2020-11-28 07:41:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:28,428 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:41:28,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852594131] [2020-11-28 07:41:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/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 07:41:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:41:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:28,522 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 07:41:28,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:28,528 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 07:41:28,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883142930] [2020-11-28 07:41:28,529 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:41:28,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852594131] [2020-11-28 07:41:28,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:28,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:41:28,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114024837] [2020-11-28 07:41:28,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:28,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:28,531 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 3 states. [2020-11-28 07:41:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:28,639 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-11-28 07:41:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:28,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-28 07:41:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:28,641 INFO L225 Difference]: With dead ends: 61 [2020-11-28 07:41:28,641 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 07:41:28,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 07:41:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2020-11-28 07:41:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-28 07:41:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-28 07:41:28,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 7 [2020-11-28 07:41:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:28,649 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-28 07:41:28,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-28 07:41:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:41:28,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:28,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:28,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:28,870 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash -985752812, now seen corresponding path program 1 times [2020-11-28 07:41:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:28,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640863687] [2020-11-28 07:41:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:28,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:41:28,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054435822] [2020-11-28 07:41:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/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 07:41:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:41:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:29,026 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 07:41:29,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:29,041 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 07:41:29,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640863687] [2020-11-28 07:41:29,044 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:41:29,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054435822] [2020-11-28 07:41:29,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:29,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-28 07:41:29,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196954300] [2020-11-28 07:41:29,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:29,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:29,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:29,048 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-11-28 07:41:29,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:29,096 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-11-28 07:41:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:41:29,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 07:41:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:29,099 INFO L225 Difference]: With dead ends: 48 [2020-11-28 07:41:29,099 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:41:29,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:41:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:41:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:41:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-28 07:41:29,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-11-28 07:41:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:29,104 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-28 07:41:29,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-28 07:41:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:41:29,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:29,106 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:29,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:29,338 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1860801587, now seen corresponding path program 1 times [2020-11-28 07:41:29,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:29,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805593289] [2020-11-28 07:41:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:29,344 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:41:29,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850774019] [2020-11-28 07:41:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:29,413 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:29,432 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:29,461 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:41:29,461 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:41:29,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:29,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:29 BoogieIcfgContainer [2020-11-28 07:41:29,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:29,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:29,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:29,726 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:29,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:27" (3/4) ... [2020-11-28 07:41:29,729 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:41:29,792 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bba3078f-e40b-4dd2-b8d5-6f48e87f49e8/bin/utaipan/witness.graphml [2020-11-28 07:41:29,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:29,794 INFO L168 Benchmark]: Toolchain (without parser) took 4579.05 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 61.4 MB in the beginning and 70.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,795 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 66.9 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:29,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.13 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 70.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.66 ms. Allocated memory is still 94.4 MB. Free memory was 70.5 MB in the beginning and 68.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,797 INFO L168 Benchmark]: Boogie Preprocessor took 51.37 ms. Allocated memory is still 94.4 MB. Free memory was 68.5 MB in the beginning and 67.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,798 INFO L168 Benchmark]: RCFGBuilder took 1426.37 ms. Allocated memory is still 94.4 MB. Free memory was 67.3 MB in the beginning and 38.8 MB in the end (delta: 28.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,799 INFO L168 Benchmark]: TraceAbstraction took 2524.05 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 38.3 MB in the beginning and 72.8 MB in the end (delta: -34.4 MB). Peak memory consumption was 838.5 kB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,800 INFO L168 Benchmark]: Witness Printer took 66.90 ms. Allocated memory is still 127.9 MB. Free memory was 72.8 MB in the beginning and 70.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:29,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 66.9 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 428.13 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 70.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.66 ms. Allocated memory is still 94.4 MB. Free memory was 70.5 MB in the beginning and 68.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.37 ms. Allocated memory is still 94.4 MB. Free memory was 68.5 MB in the beginning and 67.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1426.37 ms. Allocated memory is still 94.4 MB. Free memory was 67.3 MB in the beginning and 38.8 MB in the end (delta: 28.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2524.05 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 38.3 MB in the beginning and 72.8 MB in the end (delta: -34.4 MB). Peak memory consumption was 838.5 kB. Max. memory is 16.1 GB. * Witness Printer took 66.90 ms. Allocated memory is still 127.9 MB. Free memory was 72.8 MB in the beginning and 70.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<1 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND FALSE !(counter++<1) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND FALSE !(counter++<1) [L11] COND TRUE !(cond) VAL [counter=3] [L4] __assert_fail("0", "egcd2-ll.c", 4, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 43 SDslu, 97 SDs, 0 SdLazy, 33 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 19 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 SizeOfPredicates, 3 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...