./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73252317e8e8ddde1fed282fcf12f7cfbb9f94a9 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 13:15:09,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:15:09,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:15:09,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:15:09,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:15:09,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:15:09,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:15:09,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:15:09,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:15:09,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:15:09,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:15:09,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:15:09,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:15:09,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:15:09,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:15:09,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:15:09,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:15:09,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:15:09,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:15:09,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:15:09,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:15:09,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:15:09,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:15:09,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:15:09,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:15:09,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:15:09,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:15:09,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:15:09,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:15:09,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:15:09,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:15:09,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:15:09,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:15:09,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:15:09,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:15:09,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:15:09,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:15:09,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:15:09,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:15:09,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:15:09,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:15:09,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 13:15:09,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:15:09,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:15:09,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:15:09,999 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:15:09,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:15:09,999 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:15:09,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:15:10,000 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:15:10,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:15:10,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:15:10,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:15:10,000 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:15:10,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:15:10,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:15:10,001 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:15:10,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:15:10,001 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:15:10,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:15:10,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:15:10,002 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:15:10,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:15:10,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:15:10,003 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:15:10,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:15:10,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:15:10,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:15:10,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:15:10,004 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_2a945303-cd54-4153-bd61-b86f5b6dbba9/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(__VERIFIER_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 -> 73252317e8e8ddde1fed282fcf12f7cfbb9f94a9 [2019-12-07 13:15:10,101 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:15:10,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:15:10,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:15:10,115 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:15:10,115 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:15:10,116 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/../../sv-benchmarks/c/array-fpi/brs2f.c [2019-12-07 13:15:10,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/data/4b0683a19/e12a1e1324124262914c61dcdea2e9dd/FLAG3e3e2d3ba [2019-12-07 13:15:10,533 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:15:10,533 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/sv-benchmarks/c/array-fpi/brs2f.c [2019-12-07 13:15:10,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/data/4b0683a19/e12a1e1324124262914c61dcdea2e9dd/FLAG3e3e2d3ba [2019-12-07 13:15:10,947 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/data/4b0683a19/e12a1e1324124262914c61dcdea2e9dd [2019-12-07 13:15:10,950 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:15:10,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:15:10,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:15:10,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:15:10,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:15:10,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b8aa41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:10, skipping insertion in model container [2019-12-07 13:15:10,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:15:10" (1/1) ... [2019-12-07 13:15:10,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:15:10,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:15:11,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:15:11,141 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:15:11,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:15:11,171 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:15:11,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11 WrapperNode [2019-12-07 13:15:11,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:15:11,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:15:11,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:15:11,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:15:11,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:15:11,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:15:11,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:15:11,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:15:11,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... [2019-12-07 13:15:11,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:15:11,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:15:11,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:15:11,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:15:11,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/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 [2019-12-07 13:15:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:15:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:15:11,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 13:15:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:15:11,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:15:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 13:15:11,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:15:11,468 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:15:11,469 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 13:15:11,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:15:11 BoogieIcfgContainer [2019-12-07 13:15:11,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:15:11,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:15:11,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:15:11,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:15:11,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:15:10" (1/3) ... [2019-12-07 13:15:11,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166415ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:15:11, skipping insertion in model container [2019-12-07 13:15:11,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:15:11" (2/3) ... [2019-12-07 13:15:11,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166415ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:15:11, skipping insertion in model container [2019-12-07 13:15:11,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:15:11" (3/3) ... [2019-12-07 13:15:11,475 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2019-12-07 13:15:11,481 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:15:11,485 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:15:11,492 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:15:11,506 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:15:11,506 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:15:11,506 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:15:11,506 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:15:11,506 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:15:11,506 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:15:11,506 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:15:11,507 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:15:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-12-07 13:15:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 13:15:11,519 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,519 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 13:15:11,519 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1709729686, now seen corresponding path program 1 times [2019-12-07 13:15:11,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304055934] [2019-12-07 13:15:11,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:11,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304055934] [2019-12-07 13:15:11,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:15:11,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:15:11,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771795328] [2019-12-07 13:15:11,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:15:11,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:15:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:15:11,651 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-12-07 13:15:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:11,675 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2019-12-07 13:15:11,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:15:11,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 13:15:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:11,682 INFO L225 Difference]: With dead ends: 18 [2019-12-07 13:15:11,682 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 13:15:11,684 INFO L630 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 [2019-12-07 13:15:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 13:15:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 13:15:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 13:15:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 13:15:11,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2019-12-07 13:15:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:11,705 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 13:15:11,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:15:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-12-07 13:15:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:15:11,705 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,705 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:11,705 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1463694476, now seen corresponding path program 1 times [2019-12-07 13:15:11,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568841202] [2019-12-07 13:15:11,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:15:11,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568841202] [2019-12-07 13:15:11,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:15:11,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 13:15:11,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990158192] [2019-12-07 13:15:11,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:15:11,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:15:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:15:11,752 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-12-07 13:15:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:11,769 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 13:15:11,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:15:11,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 13:15:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:11,770 INFO L225 Difference]: With dead ends: 12 [2019-12-07 13:15:11,770 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 13:15:11,770 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:15:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 13:15:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 13:15:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 13:15:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 13:15:11,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2019-12-07 13:15:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:11,772 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 13:15:11,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:15:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-12-07 13:15:11,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 13:15:11,773 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:11,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:11,773 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1870068243, now seen corresponding path program 1 times [2019-12-07 13:15:11,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:11,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722711162] [2019-12-07 13:15:11,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:15:11,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722711162] [2019-12-07 13:15:11,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850248412] [2019-12-07 13:15:11,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/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 [2019-12-07 13:15:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:11,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:15:11,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:11,924 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 13:15:11,924 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:15:11,930 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:15:11,930 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 13:15:11,930 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-12-07 13:15:11,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:15:11,958 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:11,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:15:11,984 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 13:15:11,985 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2019-12-07 13:15:11,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 13:15:11,987 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 13:15:11,997 INFO L614 ElimStorePlain]: treesize reduction 5, result has 68.8 percent of original size [2019-12-07 13:15:11,997 INFO L534 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-12-07 13:15:11,998 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:11 [2019-12-07 13:15:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:15:12,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359869144] [2019-12-07 13:15:12,032 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 13:15:12,032 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:15:12,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:15:12,040 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:15:12,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:15:12,215 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,223 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,246 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,264 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,285 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,292 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,298 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,377 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,406 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,459 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:12,553 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:15:12,844 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:15:12,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:12,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2019-12-07 13:15:12,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199438946] [2019-12-07 13:15:12,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 13:15:12,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 13:15:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:15:12,847 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 13 states. [2019-12-07 13:15:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:12,896 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-12-07 13:15:12,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:15:12,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2019-12-07 13:15:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:12,897 INFO L225 Difference]: With dead ends: 13 [2019-12-07 13:15:12,897 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 13:15:12,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-07 13:15:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 13:15:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 13:15:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 13:15:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 13:15:12,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-12-07 13:15:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:12,900 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 13:15:12,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 13:15:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-12-07 13:15:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:15:12,901 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:12,901 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:13,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:13,102 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2137497428, now seen corresponding path program 2 times [2019-12-07 13:15:13,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:13,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787657938] [2019-12-07 13:15:13,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787657938] [2019-12-07 13:15:13,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031314087] [2019-12-07 13:15:13,243 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/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 [2019-12-07 13:15:13,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 13:15:13,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:15:13,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:15:13,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,349 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:13,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073114152] [2019-12-07 13:15:13,371 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 13:15:13,371 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:15:13,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:15:13,371 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:15:13,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:15:13,424 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,438 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,442 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,483 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,489 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,497 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,525 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,550 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,567 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,649 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,666 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,696 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,731 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:13,791 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:15:13,983 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:15:13,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:13,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-12-07 13:15:13,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508887005] [2019-12-07 13:15:13,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:15:13,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:13,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:15:13,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:15:13,985 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2019-12-07 13:15:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:14,010 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-12-07 13:15:14,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:15:14,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-07 13:15:14,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:14,011 INFO L225 Difference]: With dead ends: 17 [2019-12-07 13:15:14,011 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 13:15:14,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:15:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 13:15:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 13:15:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 13:15:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 13:15:14,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-12-07 13:15:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:14,013 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 13:15:14,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:15:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 13:15:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:15:14,013 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:14,014 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:14,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:14,215 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 263264266, now seen corresponding path program 3 times [2019-12-07 13:15:14,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:14,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640516092] [2019-12-07 13:15:14,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:14,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640516092] [2019-12-07 13:15:14,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237811098] [2019-12-07 13:15:14,470 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/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 [2019-12-07 13:15:14,496 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:15:14,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:15:14,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 13:15:14,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:14,652 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:14,799 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-12-07 13:15:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:14,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510257891] [2019-12-07 13:15:14,926 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 13:15:14,926 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:15:14,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:15:14,926 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:15:14,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:15:15,028 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,035 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,041 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,047 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,053 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,058 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,064 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,121 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,142 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,165 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,187 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:15,237 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:15:15,481 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:15:15,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:15,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2019-12-07 13:15:15,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148626252] [2019-12-07 13:15:15,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 13:15:15,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 13:15:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2019-12-07 13:15:15,483 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 22 states. [2019-12-07 13:15:15,790 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2019-12-07 13:15:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:16,133 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-12-07 13:15:16,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:15:16,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 10 [2019-12-07 13:15:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:16,134 INFO L225 Difference]: With dead ends: 15 [2019-12-07 13:15:16,134 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 13:15:16,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:15:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 13:15:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 13:15:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 13:15:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 13:15:16,138 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-12-07 13:15:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:16,138 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 13:15:16,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 13:15:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 13:15:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:15:16,139 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:16,139 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:16,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:16,340 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash -428785603, now seen corresponding path program 4 times [2019-12-07 13:15:16,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:16,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472779514] [2019-12-07 13:15:16,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:16,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472779514] [2019-12-07 13:15:16,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053381650] [2019-12-07 13:15:16,398 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:15:16,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:15:16,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:15:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:16,446 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:15:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:15:16,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567929735] [2019-12-07 13:15:16,463 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 13:15:16,463 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:15:16,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:15:16,463 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:15:16,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:15:16,492 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,507 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,510 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,551 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,556 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,562 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,567 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,572 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,587 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,598 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,650 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,685 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,709 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 13:15:16,754 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:15:16,940 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:15:16,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:15:16,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2019-12-07 13:15:16,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549932182] [2019-12-07 13:15:16,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 13:15:16,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:15:16,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 13:15:16,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:15:16,941 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 13 states. [2019-12-07 13:15:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:15:16,980 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-12-07 13:15:16,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:15:16,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2019-12-07 13:15:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:15:16,980 INFO L225 Difference]: With dead ends: 20 [2019-12-07 13:15:16,980 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 13:15:16,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:15:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 13:15:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 13:15:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 13:15:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 13:15:16,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2019-12-07 13:15:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:15:16,984 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 13:15:16,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 13:15:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 13:15:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:15:16,984 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:15:16,984 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 13:15:17,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:15:17,186 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:15:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:15:17,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1975557261, now seen corresponding path program 5 times [2019-12-07 13:15:17,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:15:17,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638282590] [2019-12-07 13:15:17,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:15:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:15:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 13:15:17,289 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 13:15:17,289 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 13:15:17,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:15:17 BoogieIcfgContainer [2019-12-07 13:15:17,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:15:17,310 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:15:17,310 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:15:17,310 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:15:17,310 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:15:11" (3/4) ... [2019-12-07 13:15:17,311 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 13:15:17,341 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2a945303-cd54-4153-bd61-b86f5b6dbba9/bin/utaipan/witness.graphml [2019-12-07 13:15:17,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:15:17,342 INFO L168 Benchmark]: Toolchain (without parser) took 6391.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 941.5 MB in the beginning and 837.9 MB in the end (delta: 103.6 MB). Peak memory consumption was 256.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:17,342 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 957.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:15:17,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.89 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 941.5 MB in the beginning and 1.1 GB in the end (delta: -149.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:17,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:15:17,343 INFO L168 Benchmark]: Boogie Preprocessor took 16.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:15:17,343 INFO L168 Benchmark]: RCFGBuilder took 254.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:17,343 INFO L168 Benchmark]: TraceAbstraction took 5839.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 55.6 MB). Free memory was 1.1 GB in the beginning and 846.3 MB in the end (delta: 217.7 MB). Peak memory consumption was 273.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:17,344 INFO L168 Benchmark]: Witness Printer took 31.92 ms. Allocated memory is still 1.2 GB. Free memory was 846.3 MB in the beginning and 837.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:15:17,345 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 957.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 219.89 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 941.5 MB in the beginning and 1.1 GB in the end (delta: -149.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 254.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5839.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 55.6 MB). Free memory was 1.1 GB in the beginning and 846.3 MB in the end (delta: 217.7 MB). Peak memory consumption was 273.3 MB. Max. memory is 11.5 GB. * Witness Printer took 31.92 ms. Allocated memory is still 1.2 GB. Free memory was 846.3 MB in the beginning and 837.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] i=0 VAL [N=3] [L26] COND TRUE i