./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/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 6b7e4344a1b47d68a491e369e16c1769051091e9 .......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:53:42,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:53:42,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:53:43,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:53:43,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:53:43,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:53:43,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:53:43,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:53:43,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:53:43,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:53:43,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:53:43,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:53:43,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:53:43,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:53:43,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:53:43,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:53:43,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:53:43,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:53:43,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:53:43,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:53:43,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:53:43,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:53:43,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:53:43,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:53:43,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:53:43,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:53:43,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:53:43,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:53:43,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:53:43,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:53:43,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:53:43,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:53:43,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:53:43,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:53:43,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:53:43,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:53:43,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:53:43,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:53:43,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:53:43,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:53:43,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:53:43,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:53:43,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:53:43,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:53:43,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:53:43,173 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:53:43,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:53:43,174 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:53:43,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:53:43,174 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:53:43,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:53:43,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:53:43,176 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:53:43,177 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:53:43,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:53:43,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:53:43,178 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:53:43,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:53:43,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:53:43,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:53:43,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:53:43,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:53:43,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:53:43,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:53:43,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:53:43,181 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:53:43,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:53:43,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:53:43,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:53:43,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:53:43,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:53:43,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:53:43,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:53:43,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:53:43,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:53:43,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:53:43,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:53:43,186 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:53:43,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:53:43,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:53:43,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:53:43,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:53:43,188 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_54d60504-dd56-485b-93da-9bd3bc0e7e32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b7e4344a1b47d68a491e369e16c1769051091e9 [2020-11-22 12:53:43,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:53:43,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:53:43,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:53:43,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:53:43,586 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:53:43,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2020-11-22 12:53:43,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/data/170779143/676dd34ddbf24ee88116de1541526e75/FLAG9763ef096 [2020-11-22 12:53:44,312 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:53:44,313 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2020-11-22 12:53:44,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/data/170779143/676dd34ddbf24ee88116de1541526e75/FLAG9763ef096 [2020-11-22 12:53:44,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/data/170779143/676dd34ddbf24ee88116de1541526e75 [2020-11-22 12:53:44,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:53:44,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:53:44,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:44,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:53:44,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:53:44,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:44,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d37e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44, skipping insertion in model container [2020-11-22 12:53:44,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:44,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:53:44,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:53:44,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:44,923 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:53:44,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:53:44,959 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:53:44,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44 WrapperNode [2020-11-22 12:53:44,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:53:44,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:44,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:53:44,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:53:44,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:44,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:44,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:53:45,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:53:45,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:53:45,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:53:45,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... [2020-11-22 12:53:45,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:53:45,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:53:45,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:53:45,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:53:45,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:53:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:53:45,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:53:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:53:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:53:45,445 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:53:45,445 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 12:53:45,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:45 BoogieIcfgContainer [2020-11-22 12:53:45,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:53:45,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:53:45,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:53:45,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:53:45,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:53:44" (1/3) ... [2020-11-22 12:53:45,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718a7dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:45, skipping insertion in model container [2020-11-22 12:53:45,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:53:44" (2/3) ... [2020-11-22 12:53:45,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718a7dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:53:45, skipping insertion in model container [2020-11-22 12:53:45,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:45" (3/3) ... [2020-11-22 12:53:45,458 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2020-11-22 12:53:45,471 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:53:45,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:53:45,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 12:53:45,532 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:53:45,533 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:53:45,533 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:53:45,533 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:53:45,533 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:53:45,533 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:53:45,534 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:53:45,534 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:53:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-22 12:53:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:53:45,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:45,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:53:45,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash 67669520, now seen corresponding path program 1 times [2020-11-22 12:53:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:45,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456143414] [2020-11-22 12:53:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456143414] [2020-11-22 12:53:45,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:53:45,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:53:45,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923959363] [2020-11-22 12:53:45,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:53:45,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:46,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:53:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:53:46,009 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-22 12:53:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:46,059 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-11-22 12:53:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:53:46,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 12:53:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:46,083 INFO L225 Difference]: With dead ends: 18 [2020-11-22 12:53:46,088 INFO L226 Difference]: Without dead ends: 7 [2020-11-22 12:53:46,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:53:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-22 12:53:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-22 12:53:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-22 12:53:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-22 12:53:46,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-22 12:53:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:46,132 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-22 12:53:46,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:53:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-22 12:53:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:53:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:46,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:53:46,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:53:46,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2096913276, now seen corresponding path program 1 times [2020-11-22 12:53:46,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:46,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985679969] [2020-11-22 12:53:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:46,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985679969] [2020-11-22 12:53:46,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457442116] [2020-11-22 12:53:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:53:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:53:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:53:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:53:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:46,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:53:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:53:46,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352052473] [2020-11-22 12:53:46,762 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 12:53:46,762 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:53:46,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:53:46,777 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:53:46,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:53:47,293 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:53:47,451 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-11-22 12:53:47,659 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-11-22 12:53:47,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:53:47,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:53:47,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2020-11-22 12:53:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147312198] [2020-11-22 12:53:47,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:53:47,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:53:47,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:53:47,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:53:47,910 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2020-11-22 12:53:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:53:47,962 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-11-22 12:53:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:53:47,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 12:53:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:53:47,965 INFO L225 Difference]: With dead ends: 11 [2020-11-22 12:53:47,965 INFO L226 Difference]: Without dead ends: 8 [2020-11-22 12:53:47,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-22 12:53:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-22 12:53:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-22 12:53:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-22 12:53:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-22 12:53:47,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-22 12:53:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:53:47,977 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-22 12:53:47,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:53:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-22 12:53:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:53:47,978 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:53:47,979 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-22 12:53:48,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:53:48,181 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:53:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:53:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash 578960272, now seen corresponding path program 2 times [2020-11-22 12:53:48,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:53:48,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520164935] [2020-11-22 12:53:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:53:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:53:48,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:53:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:53:48,284 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:53:48,317 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:53:48,321 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:53:48,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-22 12:53:48,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:53:48 BoogieIcfgContainer [2020-11-22 12:53:48,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:53:48,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:53:48,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:53:48,360 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:53:48,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:53:45" (3/4) ... [2020-11-22 12:53:48,363 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:53:48,444 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_54d60504-dd56-485b-93da-9bd3bc0e7e32/bin/utaipan/witness.graphml [2020-11-22 12:53:48,453 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:53:48,455 INFO L168 Benchmark]: Toolchain (without parser) took 3780.90 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 57.2 MB in the beginning and 78.2 MB in the end (delta: -20.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:48,456 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 67.1 MB. Free memory is still 29.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:48,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.28 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 67.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:48,460 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.67 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 65.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:48,461 INFO L168 Benchmark]: Boogie Preprocessor took 24.68 ms. Allocated memory is still 88.1 MB. Free memory was 65.9 MB in the beginning and 64.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:48,461 INFO L168 Benchmark]: RCFGBuilder took 422.54 ms. Allocated memory is still 88.1 MB. Free memory was 64.6 MB in the beginning and 51.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:53:48,462 INFO L168 Benchmark]: TraceAbstraction took 2909.03 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.8 MB in the beginning and 79.3 MB in the end (delta: -28.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:48,464 INFO L168 Benchmark]: Witness Printer took 94.27 ms. Allocated memory is still 107.0 MB. Free memory was 79.3 MB in the beginning and 78.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:53:48,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 67.1 MB. Free memory is still 29.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.28 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 67.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.67 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 65.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.68 ms. Allocated memory is still 88.1 MB. Free memory was 65.9 MB in the beginning and 64.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 422.54 ms. Allocated memory is still 88.1 MB. Free memory was 64.6 MB in the beginning and 51.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2909.03 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 50.8 MB in the beginning and 79.3 MB in the end (delta: -28.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 94.27 ms. Allocated memory is still 107.0 MB. Free memory was 79.3 MB in the beginning and 78.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 2]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L5] unsigned char n = __VERIFIER_nondet_uchar(); [L6] COND FALSE !(n == 0) [L9] unsigned char v = 0; [L10] unsigned char s = 0; [L11] unsigned int i = 0; [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND FALSE !(i < n) [L17] COND TRUE s < v [L2] __assert_fail("0", "linear-inequality-inv-b.c", 2, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 1 QuantifiedInterpolants, 891 SizeOfPredicates, 2 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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...