./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo2-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_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/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 5bf347f215fd4f34559d41a60749a5be46100790 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:00:43,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:00:43,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:00:43,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:00:43,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:00:43,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:00:43,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:00:43,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:00:43,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:00:43,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:00:43,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:00:43,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:00:43,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:00:43,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:00:43,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:00:43,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:00:43,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:00:43,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:00:43,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:00:43,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:00:43,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:00:43,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:00:43,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:00:43,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:00:43,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:00:43,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:00:43,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:00:43,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:00:43,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:00:43,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:00:43,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:00:43,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:00:43,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:00:43,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:00:43,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:00:43,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:00:43,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:00:43,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:00:43,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:00:43,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:00:43,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:00:43,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:00:43,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:00:43,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:00:43,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:00:43,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:00:43,148 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:00:43,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:00:43,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:00:43,149 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:00:43,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:00:43,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:00:43,151 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:00:43,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:00:43,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:00:43,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:00:43,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:00:43,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:00:43,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:00:43,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:00:43,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:00:43,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:00:43,152 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:00:43,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:00:43,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:00:43,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:00:43,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:00:43,153 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_6a19a4c9-0dc3-4aee-a551-b40cc395d339/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf347f215fd4f34559d41a60749a5be46100790 [2020-12-09 05:00:43,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:00:43,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:00:43,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:00:43,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:00:43,356 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:00:43,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound1.c [2020-12-09 05:00:43,401 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/data/06baa80fd/4e74c5d213f04adc90654af54d49b374/FLAG57e746770 [2020-12-09 05:00:43,784 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:00:43,784 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound1.c [2020-12-09 05:00:43,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/data/06baa80fd/4e74c5d213f04adc90654af54d49b374/FLAG57e746770 [2020-12-09 05:00:43,798 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/data/06baa80fd/4e74c5d213f04adc90654af54d49b374 [2020-12-09 05:00:43,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:00:43,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:00:43,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:00:43,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:00:43,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:00:43,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:43,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ba8e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43, skipping insertion in model container [2020-12-09 05:00:43,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:43,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:00:43,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:00:43,934 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_6a19a4c9-0dc3-4aee-a551-b40cc395d339/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound1.c[525,538] [2020-12-09 05:00:43,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:00:43,950 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:00:43,958 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_6a19a4c9-0dc3-4aee-a551-b40cc395d339/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound1.c[525,538] [2020-12-09 05:00:43,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:00:43,971 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:00:43,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43 WrapperNode [2020-12-09 05:00:43,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:00:43,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:00:43,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:00:43,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:00:43,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:43,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:43,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:00:43,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:00:43,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:00:43,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:00:44,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... [2020-12-09 05:00:44,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:00:44,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:00:44,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:00:44,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:00:44,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/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 05:00:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:00:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:00:44,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:00:44,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:00:44,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:00:44,236 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 05:00:44,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:00:44 BoogieIcfgContainer [2020-12-09 05:00:44,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:00:44,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:00:44,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:00:44,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:00:44,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:00:43" (1/3) ... [2020-12-09 05:00:44,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67895908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:00:44, skipping insertion in model container [2020-12-09 05:00:44,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:00:43" (2/3) ... [2020-12-09 05:00:44,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67895908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:00:44, skipping insertion in model container [2020-12-09 05:00:44,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:00:44" (3/3) ... [2020-12-09 05:00:44,246 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound1.c [2020-12-09 05:00:44,259 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:00:44,261 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 05:00:44,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 05:00:44,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:00:44,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:00:44,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:00:44,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:00:44,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:00:44,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:00:44,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:00:44,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:00:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 05:00:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 05:00:44,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:00:44,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 05:00:44,310 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:00:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:00:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash 71331668, now seen corresponding path program 1 times [2020-12-09 05:00:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:00:44,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643243985] [2020-12-09 05:00:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:00:44,419 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:00:44,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400845235] [2020-12-09 05:00:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/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 05:00:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:00:44,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 05:00:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:00:44,520 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 05:00:44,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:00:44,565 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 05:00:44,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643243985] [2020-12-09 05:00:44,566 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:00:44,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400845235] [2020-12-09 05:00:44,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:00:44,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 05:00:44,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798138866] [2020-12-09 05:00:44,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:00:44,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:00:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:00:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:00:44,587 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2020-12-09 05:00:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:00:44,643 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-12-09 05:00:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:00:44,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 05:00:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:00:44,650 INFO L225 Difference]: With dead ends: 37 [2020-12-09 05:00:44,650 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 05:00:44,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:00:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 05:00:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2020-12-09 05:00:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 05:00:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 05:00:44,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2020-12-09 05:00:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:00:44,674 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 05:00:44,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:00:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 05:00:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:00:44,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:00:44,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 05:00:44,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 05:00:44,875 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:00:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:00:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash 237578496, now seen corresponding path program 1 times [2020-12-09 05:00:44,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:00:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995274539] [2020-12-09 05:00:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:00:44,892 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:00:44,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818101881] [2020-12-09 05:00:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/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 05:00:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:00:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 05:00:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:00:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:00:44,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:00:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:00:44,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995274539] [2020-12-09 05:00:44,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:00:44,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818101881] [2020-12-09 05:00:44,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756253813] [2020-12-09 05:00:44,985 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 05:00:44,986 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:00:44,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:00:44,993 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:00:44,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:00:45,465 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:00:45,580 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-09 05:00:46,127 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 98 [2020-12-09 05:00:46,583 WARN L197 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 84 [2020-12-09 05:00:46,831 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2020-12-09 05:00:46,861 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:00:46,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 05:00:46,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-09 05:00:46,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779846465] [2020-12-09 05:00:46,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:00:46,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:00:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:00:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 05:00:46,863 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-12-09 05:00:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:00:46,885 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 05:00:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:00:46,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 05:00:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:00:46,886 INFO L225 Difference]: With dead ends: 21 [2020-12-09 05:00:46,886 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 05:00:46,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 05:00:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 05:00:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 05:00:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 05:00:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-12-09 05:00:46,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 9 [2020-12-09 05:00:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:00:46,889 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-12-09 05:00:46,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:00:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-12-09 05:00:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:00:46,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:00:46,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:00:47,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:00:47,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:00:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:00:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1225044859, now seen corresponding path program 1 times [2020-12-09 05:00:47,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:00:47,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024430886] [2020-12-09 05:00:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:00:47,124 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:00:47,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364800241] [2020-12-09 05:00:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/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 05:00:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:00:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 05:00:47,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:00:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:00:47,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:00:55,347 WARN L197 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 05:00:57,386 WARN L860 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~z~0 Int)) (let ((.cse0 (* ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~x~0))) (or (not (= (+ c_ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0)) (+ .cse0 1))) (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~x~0) ULTIMATE.start_main_~z~0) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0) .cse0))))) is different from true [2020-12-09 05:00:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-09 05:00:57,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024430886] [2020-12-09 05:00:57,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:00:57,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364800241] [2020-12-09 05:00:57,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439512035] [2020-12-09 05:00:57,402 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 05:00:57,402 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 05:00:57,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 05:00:57,402 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 05:00:57,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 05:01:05,883 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 05:01:07,905 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_#t~string4.base|))) (and (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| c_ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 (+ c_ULTIMATE.start_main_~z~0 2147483648)) (<= 0 (+ c_ULTIMATE.start_main_~y~0 2147483648)) (= c_ULTIMATE.start_main_~c~0 2) (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 (+ c_ULTIMATE.start_main_~x~0 2147483647)) (= (select |c_#valid| 0) 0) (= 10 (select |c_#length| |c_#t~string5.base|)) (= c_ULTIMATE.start_main_~x~0 (+ c_ULTIMATE.start_main_~z~0 1)) (<= c_ULTIMATE.start_main_~y~0 2147483647) (< 1 c_ULTIMATE.start_main_~k~0) (let ((.cse0 (= (+ c_ULTIMATE.start_main_~x~0 (* c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0)) (+ (* c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~x~0) 1)))) (or (and (not .cse0) (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| 0)) (and .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| 1)))) (= (select |c_#valid| |c_#t~string5.base|) 1) (= (select |c_#valid| |c_#t~string4.base|) 1) (<= 0 |c_#t~string6.base|) (<= 0 |c_#t~string5.base|) (= |c_#t~string5.offset| 0) (<= c_ULTIMATE.start_main_~z~0 2147483647) (not (= |c_#t~string6.base| 0)) (not (= |c_#t~string4.base| 0)) (= 12 (select |c_#length| |c_#t~string6.base|)) (< |c_#StackHeapBarrier| |c_#t~string5.base|) (= |c_#NULL.offset| 0) (= 0 |c_#t~string4.offset|) (= 2 (select |c_#length| |c_#t~string4.base|)) (= |c_#NULL.base| 0) (not (= |c_#t~string5.base| 0)) (= c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0) (<= c_ULTIMATE.start_main_~x~0 2147483648) (= (select |c_#valid| |c_#t~string6.base|) 1) (= 48 (select .cse1 |c_#t~string4.offset|)) (<= 0 |c_#t~string4.base|) (= c_~counter~0 2) (< |c_#StackHeapBarrier| |c_#t~string6.base|) (< |c_#StackHeapBarrier| |c_#t~string4.base|) (< 0 |c_#StackHeapBarrier|) (<= c_ULTIMATE.start_main_~k~0 2147483647) (= |c_#t~string6.offset| 0) (= (select .cse1 (+ |c_#t~string4.offset| 1)) 0))) is different from false [2020-12-09 05:01:14,583 WARN L197 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 97 [2020-12-09 05:01:21,463 WARN L197 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 102 [2020-12-09 05:01:21,734 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2020-12-09 05:01:21,997 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-09 05:01:24,031 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_#t~string4.base|))) (and (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| c_ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 (+ c_ULTIMATE.start_main_~z~0 2147483648)) (<= 0 (+ c_ULTIMATE.start_main_~y~0 2147483648)) (= c_ULTIMATE.start_main_~c~0 2) (<= 0 (+ c_ULTIMATE.start_main_~x~0 2147483647)) (= (select |c_#valid| 0) 0) (= 10 (select |c_#length| |c_#t~string5.base|)) (= c_ULTIMATE.start_main_~x~0 (+ c_ULTIMATE.start_main_~z~0 1)) (<= c_ULTIMATE.start_main_~y~0 2147483647) (< 1 c_ULTIMATE.start_main_~k~0) (let ((.cse0 (= (+ c_ULTIMATE.start_main_~x~0 (* c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0)) (+ (* c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~x~0) 1)))) (or (and (not .cse0) (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| 0)) (and .cse0 (= |c_ULTIMATE.start___VERIFIER_assert_#in~cond| 1)))) (= (select |c_#valid| |c_#t~string5.base|) 1) (= (select |c_#valid| |c_#t~string4.base|) 1) (<= 0 |c_#t~string6.base|) (<= 0 |c_#t~string5.base|) (= |c_#t~string5.offset| 0) (<= c_ULTIMATE.start_main_~z~0 2147483647) (not (= |c_#t~string6.base| 0)) (not (= |c_#t~string4.base| 0)) (= 12 (select |c_#length| |c_#t~string6.base|)) (< |c_#StackHeapBarrier| |c_#t~string5.base|) (= |c_#NULL.offset| 0) (= 0 |c_#t~string4.offset|) (= 2 (select |c_#length| |c_#t~string4.base|)) (= |c_#NULL.base| 0) (not (= |c_#t~string5.base| 0)) (= c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0) (<= c_ULTIMATE.start_main_~x~0 2147483648) (= (select |c_#valid| |c_#t~string6.base|) 1) (= 48 (select .cse1 |c_#t~string4.offset|)) (<= 0 |c_#t~string4.base|) (= c_~counter~0 2) (< |c_#StackHeapBarrier| |c_#t~string6.base|) (< |c_#StackHeapBarrier| |c_#t~string4.base|) (< 0 |c_#StackHeapBarrier|) (<= c_ULTIMATE.start_main_~k~0 2147483647) (= |c_#t~string6.offset| 0) (= (select .cse1 (+ |c_#t~string4.offset| 1)) 0))) is different from false [2020-12-09 05:01:24,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:01:24,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 05:01:24,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-12-09 05:01:24,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304641556] [2020-12-09 05:01:24,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 05:01:24,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:01:24,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 05:01:24,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=125, Unknown=9, NotChecked=78, Total=272 [2020-12-09 05:01:24,036 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 11 states. [2020-12-09 05:01:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:01:30,166 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-12-09 05:01:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:01:30,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-09 05:01:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:01:30,219 INFO L225 Difference]: With dead ends: 11 [2020-12-09 05:01:30,220 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:01:30,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=69, Invalid=144, Unknown=9, NotChecked=84, Total=306 [2020-12-09 05:01:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:01:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:01:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:01:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:01:30,220 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-12-09 05:01:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:01:30,221 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:01:30,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 05:01:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:01:30,221 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:01:30,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-09 05:01:30,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 05:01:30,541 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 05:01:30,541 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-12-09 05:01:30,541 INFO L262 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-12-09 05:01:30,541 INFO L258 CegarLoopResult]: At program point L15-2(lines 37 38) the Hoare annotation is: (and (<= 1 ~counter~0) (= ULTIMATE.start_main_~x~0 1) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~y~0 1)) [2020-12-09 05:01:30,541 INFO L262 CegarLoopResult]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2020-12-09 05:01:30,541 INFO L258 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-12-09 05:01:30,541 INFO L262 CegarLoopResult]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2020-12-09 05:01:30,541 INFO L258 CegarLoopResult]: At program point L34-3(lines 34 43) the Hoare annotation is: (or (and (<= 1 ~counter~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~z~0 1))) (and (= ULTIMATE.start_main_~x~0 1) (= ULTIMATE.start_main_~y~0 1) (<= 0 ~counter~0))) [2020-12-09 05:01:30,541 INFO L262 CegarLoopResult]: For program point L34-4(lines 34 43) no Hoare annotation was computed. [2020-12-09 05:01:30,542 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 05:01:30,542 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-12-09 05:01:30,542 INFO L262 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-12-09 05:01:30,542 INFO L262 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-12-09 05:01:30,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:01:30 BoogieIcfgContainer [2020-12-09 05:01:30,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:01:30,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:01:30,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:01:30,553 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:01:30,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:00:44" (3/4) ... [2020-12-09 05:01:30,555 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:01:30,561 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 05:01:30,561 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 05:01:30,561 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 05:01:30,561 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:01:30,586 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6a19a4c9-0dc3-4aee-a551-b40cc395d339/bin/utaipan/witness.graphml [2020-12-09 05:01:30,586 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:01:30,587 INFO L168 Benchmark]: Toolchain (without parser) took 46785.25 ms. Allocated memory was 107.0 MB in the beginning and 199.2 MB in the end (delta: 92.3 MB). Free memory was 65.6 MB in the beginning and 118.9 MB in the end (delta: -53.2 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2020-12-09 05:01:30,587 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory is still 81.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:01:30,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.96 ms. Allocated memory is still 107.0 MB. Free memory was 65.5 MB in the beginning and 83.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-09 05:01:30,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 82.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:01:30,588 INFO L168 Benchmark]: Boogie Preprocessor took 15.28 ms. Allocated memory is still 107.0 MB. Free memory was 82.6 MB in the beginning and 81.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:01:30,589 INFO L168 Benchmark]: RCFGBuilder took 227.76 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 77.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:01:30,589 INFO L168 Benchmark]: TraceAbstraction took 46312.60 ms. Allocated memory was 107.0 MB in the beginning and 199.2 MB in the end (delta: 92.3 MB). Free memory was 77.4 MB in the beginning and 121.0 MB in the end (delta: -43.6 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:01:30,589 INFO L168 Benchmark]: Witness Printer took 33.67 ms. Allocated memory is still 199.2 MB. Free memory was 121.0 MB in the beginning and 118.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:01:30,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory is still 81.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 168.96 ms. Allocated memory is still 107.0 MB. Free memory was 65.5 MB in the beginning and 83.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 82.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.28 ms. Allocated memory is still 107.0 MB. Free memory was 82.6 MB in the beginning and 81.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 227.76 ms. Allocated memory is still 107.0 MB. Free memory was 81.3 MB in the beginning and 77.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 46312.60 ms. Allocated memory was 107.0 MB in the beginning and 199.2 MB in the end (delta: 92.3 MB). Free memory was 77.4 MB in the beginning and 121.0 MB in the end (delta: -43.6 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. * Witness Printer took 33.67 ms. Allocated memory is still 199.2 MB. Free memory was 121.0 MB in the beginning and 118.9 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: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((1 <= counter && 1 == cond) && z == y) && x == z + 1) || ((x == 1 && y == 1) && 0 <= counter) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: !(0 == cond) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((1 <= counter && x == 1) && 1 == cond) && y == 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 46.1s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 40 SDslu, 35 SDs, 0 SdLazy, 33 SolverSat, 15 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 29.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=1, 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, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 43 HoareAnnotationTreeSize, 3 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 2 QuantifiedInterpolants, 2196 SizeOfPredicates, 13 NumberOfNonLiveVariables, 199 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 4/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...