./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 0.2.0-7b2dab5 [2020-12-09 20:04:14,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:04:14,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:04:14,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:04:14,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:04:14,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:04:14,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:04:14,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:04:14,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:04:14,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:04:14,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:04:14,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:04:14,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:04:14,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:04:14,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:04:14,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:04:14,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:04:14,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:04:14,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:04:14,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:04:14,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:04:14,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:04:14,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:04:14,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:04:14,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:04:14,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:04:14,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:04:14,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:04:14,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:04:14,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:04:14,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:04:14,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:04:14,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:04:14,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:04:14,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:04:14,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:04:14,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:04:14,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:04:14,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:04:14,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:04:14,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:04:14,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 20:04:14,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:04:14,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:04:14,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:04:14,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:04:14,891 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:04:14,892 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:04:14,892 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:04:14,892 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:04:14,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:04:14,892 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:04:14,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:04:14,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:04:14,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:04:14,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:04:14,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:04:14,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:04:14,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:04:14,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:04:14,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:04:14,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:04:14,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:04:14,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:04:14,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:04:14,895 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_375b0b98-c1b3-4fe0-b089-fa07224823da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96b4706a15a135b751d9dcfc9eb745ce848cd1b [2020-12-09 20:04:15,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:04:15,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:04:15,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:04:15,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:04:15,097 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:04:15,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2020-12-09 20:04:15,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/data/33524116f/dcaa28b0cd8a48eb955b50b3e6e8c901/FLAGb10786251 [2020-12-09 20:04:15,527 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:04:15,527 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c [2020-12-09 20:04:15,532 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/data/33524116f/dcaa28b0cd8a48eb955b50b3e6e8c901/FLAGb10786251 [2020-12-09 20:04:15,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/data/33524116f/dcaa28b0cd8a48eb955b50b3e6e8c901 [2020-12-09 20:04:15,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:04:15,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:04:15,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:04:15,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:04:15,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:04:15,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce38f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15, skipping insertion in model container [2020-12-09 20:04:15,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:04:15,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:04:15,662 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2020-12-09 20:04:15,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:04:15,683 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:04:15,692 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound1.c[490,503] [2020-12-09 20:04:15,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:04:15,708 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:04:15,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15 WrapperNode [2020-12-09 20:04:15,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:04:15,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:04:15,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:04:15,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:04:15,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:04:15,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:04:15,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:04:15,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:04:15,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... [2020-12-09 20:04:15,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:04:15,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:04:15,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:04:15,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:04:15,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 [2020-12-09 20:04:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:04:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:04:15,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:04:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:04:16,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:04:16,122 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2020-12-09 20:04:16,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:04:16 BoogieIcfgContainer [2020-12-09 20:04:16,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:04:16,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:04:16,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:04:16,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:04:16,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:04:15" (1/3) ... [2020-12-09 20:04:16,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787b79d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:04:16, skipping insertion in model container [2020-12-09 20:04:16,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:04:15" (2/3) ... [2020-12-09 20:04:16,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787b79d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:04:16, skipping insertion in model container [2020-12-09 20:04:16,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:04:16" (3/3) ... [2020-12-09 20:04:16,132 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound1.c [2020-12-09 20:04:16,145 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:04:16,148 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 20:04:16,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 20:04:16,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:04:16,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:04:16,173 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:04:16,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:04:16,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:04:16,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:04:16,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:04:16,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:04:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 20:04:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:04:16,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:04:16,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:04:16,188 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]=== [2020-12-09 20:04:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:04:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash 169560536, now seen corresponding path program 1 times [2020-12-09 20:04:16,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:04:16,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097658973] [2020-12-09 20:04:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:04:16,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:04:16,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080821160] [2020-12-09 20:04:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 [2020-12-09 20:04:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:04:16,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 20:04:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:04:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:16,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:04:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:16,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097658973] [2020-12-09 20:04:16,336 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:04:16,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080821160] [2020-12-09 20:04:16,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:04:16,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-09 20:04:16,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087777304] [2020-12-09 20:04:16,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 20:04:16,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:04:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 20:04:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:04:16,354 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 20:04:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:04:16,367 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2020-12-09 20:04:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 20:04:16,368 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 20:04:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:04:16,374 INFO L225 Difference]: With dead ends: 65 [2020-12-09 20:04:16,374 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 20:04:16,377 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 [2020-12-09 20:04:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 20:04:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 20:04:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 20:04:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-09 20:04:16,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2020-12-09 20:04:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:04:16,403 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-09 20:04:16,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 20:04:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-09 20:04:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:04:16,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:04:16,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:04:16,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 20:04:16,606 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]=== [2020-12-09 20:04:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:04:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash 890891193, now seen corresponding path program 1 times [2020-12-09 20:04:16,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:04:16,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049299635] [2020-12-09 20:04:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:04:16,629 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:04:16,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900424098] [2020-12-09 20:04:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 [2020-12-09 20:04:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:04:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:04:16,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:04:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:16,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:04:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:16,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049299635] [2020-12-09 20:04:16,829 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:04:16,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900424098] [2020-12-09 20:04:16,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:04:16,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-12-09 20:04:16,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310963747] [2020-12-09 20:04:16,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:04:16,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:04:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:04:16,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:04:16,832 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-12-09 20:04:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:04:16,852 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-09 20:04:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:04:16,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 20:04:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:04:16,854 INFO L225 Difference]: With dead ends: 41 [2020-12-09 20:04:16,854 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 20:04:16,855 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 [2020-12-09 20:04:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 20:04:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 20:04:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 20:04:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-09 20:04:16,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2020-12-09 20:04:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:04:16,861 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-09 20:04:16,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:04:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-09 20:04:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:04:16,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:04:16,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:04:17,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:04:17,064 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]=== [2020-12-09 20:04:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:04:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1847641631, now seen corresponding path program 1 times [2020-12-09 20:04:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:04:17,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634319803] [2020-12-09 20:04:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:04:17,081 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:04:17,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119939643] [2020-12-09 20:04:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 [2020-12-09 20:04:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:04:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:04:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:04:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:17,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:04:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634319803] [2020-12-09 20:04:17,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:04:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119939643] [2020-12-09 20:04:17,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:04:17,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-09 20:04:17,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680307915] [2020-12-09 20:04:17,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:04:17,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:04:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:04:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:04:17,241 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 3 states. [2020-12-09 20:04:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:04:17,264 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-12-09 20:04:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:04:17,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 20:04:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:04:17,265 INFO L225 Difference]: With dead ends: 61 [2020-12-09 20:04:17,266 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 20:04:17,266 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 [2020-12-09 20:04:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 20:04:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2020-12-09 20:04:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 20:04:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-09 20:04:17,272 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 7 [2020-12-09 20:04:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:04:17,272 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-09 20:04:17,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:04:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-09 20:04:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:04:17,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:04:17,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:04:17,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:04:17,475 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]=== [2020-12-09 20:04:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:04:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1442287066, now seen corresponding path program 1 times [2020-12-09 20:04:17,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:04:17,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147696690] [2020-12-09 20:04:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:04:17,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:04:17,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104426827] [2020-12-09 20:04:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 [2020-12-09 20:04:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:04:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 20:04:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:04:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:17,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:04:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:04:17,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147696690] [2020-12-09 20:04:17,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:04:17,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104426827] [2020-12-09 20:04:17,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:04:17,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-12-09 20:04:17,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130733774] [2020-12-09 20:04:17,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:04:17,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:04:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:04:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:04:17,590 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-12-09 20:04:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:04:17,614 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-12-09 20:04:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:04:17,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 20:04:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:04:17,616 INFO L225 Difference]: With dead ends: 48 [2020-12-09 20:04:17,616 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 20:04:17,616 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 [2020-12-09 20:04:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 20:04:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 20:04:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 20:04:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 20:04:17,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-09 20:04:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:04:17,619 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 20:04:17,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:04:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 20:04:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:04:17,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:04:17,620 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:04:17,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:04:17,822 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]=== [2020-12-09 20:04:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:04:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash 971784697, now seen corresponding path program 1 times [2020-12-09 20:04:17,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:04:17,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472941419] [2020-12-09 20:04:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:04:17,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:04:17,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20886189] [2020-12-09 20:04:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/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 [2020-12-09 20:04:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:04:17,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:04:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:04:17,909 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:04:17,947 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:04:17,947 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:04:18,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:04:18,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:04:18 BoogieIcfgContainer [2020-12-09 20:04:18,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:04:18,204 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:04:18,204 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:04:18,204 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:04:18,205 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:04:16" (3/4) ... [2020-12-09 20:04:18,206 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:04:18,239 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_375b0b98-c1b3-4fe0-b089-fa07224823da/bin/utaipan/witness.graphml [2020-12-09 20:04:18,239 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:04:18,240 INFO L168 Benchmark]: Toolchain (without parser) took 2695.46 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 44.3 MB in the beginning and 65.0 MB in the end (delta: -20.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:04:18,240 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory was 60.5 MB in the beginning and 60.4 MB in the end (delta: 115.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:04:18,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.67 ms. Allocated memory is still 83.9 MB. Free memory was 44.2 MB in the beginning and 55.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-12-09 20:04:18,241 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.45 ms. Allocated memory is still 83.9 MB. Free memory was 55.9 MB in the beginning and 54.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:04:18,241 INFO L168 Benchmark]: Boogie Preprocessor took 16.90 ms. Allocated memory is still 83.9 MB. Free memory was 54.1 MB in the beginning and 53.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:04:18,242 INFO L168 Benchmark]: RCFGBuilder took 363.04 ms. Allocated memory is still 83.9 MB. Free memory was 52.7 MB in the beginning and 40.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:04:18,242 INFO L168 Benchmark]: TraceAbstraction took 2078.35 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 39.8 MB in the beginning and 67.8 MB in the end (delta: -28.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:04:18,243 INFO L168 Benchmark]: Witness Printer took 34.81 ms. Allocated memory is still 102.8 MB. Free memory was 67.8 MB in the beginning and 65.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:04:18,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory was 60.5 MB in the beginning and 60.4 MB in the end (delta: 115.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.67 ms. Allocated memory is still 83.9 MB. Free memory was 44.2 MB in the beginning and 55.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.45 ms. Allocated memory is still 83.9 MB. Free memory was 55.9 MB in the beginning and 54.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.90 ms. Allocated memory is still 83.9 MB. Free memory was 54.1 MB in the beginning and 53.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 363.04 ms. Allocated memory is still 83.9 MB. Free memory was 52.7 MB in the beginning and 40.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2078.35 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 39.8 MB in the beginning and 67.8 MB in the end (delta: -28.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 34.81 ms. Allocated memory is still 102.8 MB. Free memory was 67.8 MB in the beginning and 65.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_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] [L13] 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: 1.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, 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, 0.0s 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, 0.1s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 SizeOfPredicates, 2 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...