./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.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_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/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 c8ffdb7e52f13c5228ce15f1d79a563f57556d0a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:24:35,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:24:35,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:24:35,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:24:35,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:24:35,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:24:35,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:24:35,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:24:35,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:24:35,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:24:35,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:24:35,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:24:35,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:24:35,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:24:35,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:24:35,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:24:35,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:24:35,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:24:35,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:24:35,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:24:35,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:24:36,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:24:36,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:24:36,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:24:36,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:24:36,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:24:36,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:24:36,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:24:36,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:24:36,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:24:36,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:24:36,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:24:36,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:24:36,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:24:36,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:24:36,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:24:36,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:24:36,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:24:36,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:24:36,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:24:36,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:24:36,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:24:36,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:24:36,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:24:36,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:24:36,075 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:24:36,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:24:36,076 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:24:36,076 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:24:36,076 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:24:36,076 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:24:36,076 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:24:36,077 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:24:36,078 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:24:36,078 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:24:36,078 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:24:36,078 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:24:36,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:24:36,079 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:24:36,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:24:36,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:24:36,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:24:36,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:24:36,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:24:36,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:24:36,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:24:36,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:24:36,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:24:36,081 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:24:36,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:24:36,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:24:36,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:24:36,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:24:36,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:36,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:24:36,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:24:36,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:24:36,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:24:36,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:24:36,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:24:36,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:24:36,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:24:36,084 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_efecc99f-1452-443c-a45a-8461eb60b802/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2020-11-28 07:24:36,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:24:36,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:24:36,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:24:36,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:24:36,443 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:24:36,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-11-28 07:24:36,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/data/0a0c621d4/3d078101fbe444d4ab0146ac12a048e9/FLAGf28fe9f8b [2020-11-28 07:24:36,955 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:24:36,956 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-11-28 07:24:36,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/data/0a0c621d4/3d078101fbe444d4ab0146ac12a048e9/FLAGf28fe9f8b [2020-11-28 07:24:37,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/data/0a0c621d4/3d078101fbe444d4ab0146ac12a048e9 [2020-11-28 07:24:37,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:24:37,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:24:37,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:37,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:24:37,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:24:37,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785574d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37, skipping insertion in model container [2020-11-28 07:24:37,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:24:37,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:24:37,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:37,586 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:24:37,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:37,621 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:24:37,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37 WrapperNode [2020-11-28 07:24:37,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:37,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:37,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:24:37,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:24:37,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:37,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:24:37,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:24:37,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:24:37,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... [2020-11-28 07:24:37,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:24:37,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:24:37,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:24:37,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:24:37,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:24:37,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:24:37,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:24:37,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:24:38,375 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:24:38,376 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-28 07:24:38,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:38 BoogieIcfgContainer [2020-11-28 07:24:38,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:24:38,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:24:38,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:24:38,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:24:38,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:24:37" (1/3) ... [2020-11-28 07:24:38,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77469e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:38, skipping insertion in model container [2020-11-28 07:24:38,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:37" (2/3) ... [2020-11-28 07:24:38,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77469e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:38, skipping insertion in model container [2020-11-28 07:24:38,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:38" (3/3) ... [2020-11-28 07:24:38,386 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2020-11-28 07:24:38,397 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:24:38,401 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 07:24:38,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 07:24:38,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:24:38,438 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:24:38,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:24:38,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:24:38,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:24:38,439 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:24:38,439 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:24:38,439 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:24:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-28 07:24:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:24:38,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:38,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:24:38,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:38,469 INFO L82 PathProgramCache]: Analyzing trace with hash 100358031, now seen corresponding path program 1 times [2020-11-28 07:24:38,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:38,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40275137] [2020-11-28 07:24:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:38,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40275137] [2020-11-28 07:24:38,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:38,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:24:38,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170837794] [2020-11-28 07:24:38,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:24:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:24:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:24:38,634 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-28 07:24:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:38,648 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-28 07:24:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:24:38,650 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-28 07:24:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:38,657 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:24:38,658 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:24:38,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:24:38,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:24:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:24:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:24:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:24:38,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-11-28 07:24:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:38,701 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:24:38,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:24:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:24:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:24:38,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:38,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:24:38,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:24:38,703 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2020-11-28 07:24:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:38,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192368666] [2020-11-28 07:24:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:38,760 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:24:38,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380593365] [2020-11-28 07:24:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:24:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:38,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:39,013 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:24:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:39,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192368666] [2020-11-28 07:24:39,036 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:39,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380593365] [2020-11-28 07:24:39,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:39,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:24:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945867581] [2020-11-28 07:24:39,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:39,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:39,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:39,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:39,040 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-28 07:24:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:41,228 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-28 07:24:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:24:41,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:24:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:41,230 INFO L225 Difference]: With dead ends: 33 [2020-11-28 07:24:41,230 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:24:41,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:24:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:24:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-11-28 07:24:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:24:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-28 07:24:41,237 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 5 [2020-11-28 07:24:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:41,237 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-28 07:24:41,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-28 07:24:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:24:41,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:41,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:24:41,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:24:41,444 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1211487480, now seen corresponding path program 1 times [2020-11-28 07:24:41,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:41,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403270103] [2020-11-28 07:24:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:41,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:24:41,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013624838] [2020-11-28 07:24:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:24:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:41,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:41,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403270103] [2020-11-28 07:24:41,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:41,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013624838] [2020-11-28 07:24:41,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:41,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:24:41,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819719067] [2020-11-28 07:24:41,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:24:41,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:24:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:24:41,557 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-11-28 07:24:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:41,611 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-28 07:24:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:24:41,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:24:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:41,612 INFO L225 Difference]: With dead ends: 26 [2020-11-28 07:24:41,612 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:24:41,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:24:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:24:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-11-28 07:24:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:24:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-28 07:24:41,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2020-11-28 07:24:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:41,618 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-28 07:24:41,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:24:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-28 07:24:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:24:41,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:41,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:41,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:41,819 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -262222527, now seen corresponding path program 1 times [2020-11-28 07:24:41,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:41,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101690087] [2020-11-28 07:24:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:41,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:24:41,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148876029] [2020-11-28 07:24:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:41,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 07:24:41,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:42,042 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 07:24:42,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:24:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:42,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:42,188 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:24:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101690087] [2020-11-28 07:24:42,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148876029] [2020-11-28 07:24:42,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:42,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-11-28 07:24:42,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301501459] [2020-11-28 07:24:42,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:24:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:24:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:24:42,280 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-11-28 07:24:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:48,514 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-28 07:24:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:24:48,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-28 07:24:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:48,515 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:24:48,515 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:24:48,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:24:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:24:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:24:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:24:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-28 07:24:48,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2020-11-28 07:24:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:48,520 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-28 07:24:48,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:24:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-28 07:24:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:24:48,521 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:48,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-11-28 07:24:48,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:48,722 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:48,723 INFO L82 PathProgramCache]: Analyzing trace with hash 694035666, now seen corresponding path program 1 times [2020-11-28 07:24:48,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:48,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255890186] [2020-11-28 07:24:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:48,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:24:48,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734353107] [2020-11-28 07:24:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 07:24:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:49,089 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-11-28 07:24:49,106 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-28 07:24:49,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:24:49,265 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-11-28 07:24:49,283 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 2, 4, 1] term [2020-11-28 07:24:49,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:24:49,297 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-28 07:24:49,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:24:49,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:24:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:49,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:49,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:24:49,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 4, 1] term [2020-11-28 07:24:49,441 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:24:49,517 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:24:49,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:24:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:24:49,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255890186] [2020-11-28 07:24:49,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:49,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734353107] [2020-11-28 07:24:49,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405996255] [2020-11-28 07:24:49,541 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:24:49,541 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:49,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:49,553 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:49,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:49,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:50,219 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:50,715 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-11-28 07:24:50,930 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:24:51,165 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:24:52,092 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:24:52,811 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-28 07:24:52,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:52,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:24:52,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-11-28 07:24:52,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951881289] [2020-11-28 07:24:52,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:24:52,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:24:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:24:52,815 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-11-28 07:24:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:55,174 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-28 07:24:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:24:55,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-28 07:24:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:55,177 INFO L225 Difference]: With dead ends: 27 [2020-11-28 07:24:55,177 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:24:55,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:24:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:24:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2020-11-28 07:24:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:24:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 07:24:55,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-28 07:24:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:55,182 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 07:24:55,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:24:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 07:24:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:24:55,183 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:55,183 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-28 07:24:55,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:55,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash 40232488, now seen corresponding path program 1 times [2020-11-28 07:24:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:55,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575891782] [2020-11-28 07:24:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:55,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:24:55,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715262736] [2020-11-28 07:24:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:24:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:55,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575891782] [2020-11-28 07:24:55,556 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715262736] [2020-11-28 07:24:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221278520] [2020-11-28 07:24:55,559 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:24:55,559 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:55,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:55,560 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:55,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:55,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:55,963 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:24:56,334 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-28 07:24:56,501 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:24:56,715 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:24:57,283 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:24:58,133 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-28 07:24:58,336 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:24:58,645 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-28 07:24:58,646 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:58,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:24:58,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-28 07:24:58,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805901818] [2020-11-28 07:24:58,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:24:58,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:24:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:24:58,647 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2020-11-28 07:24:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:58,788 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-11-28 07:24:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 07:24:58,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-28 07:24:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:58,789 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:24:58,789 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:24:58,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-11-28 07:24:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:24:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-28 07:24:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 07:24:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-11-28 07:24:58,797 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 14 [2020-11-28 07:24:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:58,798 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-11-28 07:24:58,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:24:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-11-28 07:24:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 07:24:58,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:58,799 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1] [2020-11-28 07:24:58,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-28 07:24:59,000 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:24:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash -425329560, now seen corresponding path program 2 times [2020-11-28 07:24:59,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:59,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602436609] [2020-11-28 07:24:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:59,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:24:59,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729311677] [2020-11-28 07:24:59,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:24:59,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-28 07:24:59,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:24:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 07:24:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:24:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:59,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:24:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:59,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602436609] [2020-11-28 07:24:59,383 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:24:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729311677] [2020-11-28 07:24:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947640631] [2020-11-28 07:24:59,393 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:24:59,393 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:24:59,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:24:59,393 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:24:59,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:24:59,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:24:59,755 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:00,455 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-28 07:25:00,591 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:25:00,764 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:01,205 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:25:02,569 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-28 07:25:02,756 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:25:03,012 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-28 07:25:03,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:03,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:25:03,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-28 07:25:03,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997081307] [2020-11-28 07:25:03,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-28 07:25:03,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:03,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 07:25:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-11-28 07:25:03,015 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2020-11-28 07:25:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:03,407 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-11-28 07:25:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-28 07:25:03,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-11-28 07:25:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:03,410 INFO L225 Difference]: With dead ends: 67 [2020-11-28 07:25:03,410 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 07:25:03,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-11-28 07:25:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 07:25:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-28 07:25:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 07:25:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-11-28 07:25:03,433 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 30 [2020-11-28 07:25:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:03,434 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-11-28 07:25:03,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-28 07:25:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-11-28 07:25:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-28 07:25:03,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:03,440 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1] [2020-11-28 07:25:03,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:03,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash -221730584, now seen corresponding path program 3 times [2020-11-28 07:25:03,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:03,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517590440] [2020-11-28 07:25:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:03,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:25:03,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975187042] [2020-11-28 07:25:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:03,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:25:03,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:25:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-28 07:25:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:25:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:04,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:25:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:25:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517590440] [2020-11-28 07:25:04,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975187042] [2020-11-28 07:25:04,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676085516] [2020-11-28 07:25:04,312 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:25:04,313 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:25:04,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:25:04,313 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:25:04,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:25:04,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:25:04,681 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:25:05,185 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-28 07:25:05,388 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:25:05,588 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-28 07:25:06,327 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-28 07:25:06,717 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-28 07:25:06,881 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-28 07:25:07,507 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-28 07:25:07,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:25:07,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:25:07,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2020-11-28 07:25:07,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966716505] [2020-11-28 07:25:07,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-28 07:25:07,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:25:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-28 07:25:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2020-11-28 07:25:07,510 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 24 states. [2020-11-28 07:25:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:25:08,087 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-11-28 07:25:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-28 07:25:08,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-11-28 07:25:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:25:08,089 INFO L225 Difference]: With dead ends: 91 [2020-11-28 07:25:08,089 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 07:25:08,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=696, Invalid=1754, Unknown=0, NotChecked=0, Total=2450 [2020-11-28 07:25:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 07:25:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-28 07:25:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 07:25:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-11-28 07:25:08,116 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 62 [2020-11-28 07:25:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:25:08,117 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-11-28 07:25:08,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-28 07:25:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-11-28 07:25:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:25:08,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:25:08,119 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2020-11-28 07:25:08,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:08,346 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:25:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:25:08,346 INFO L82 PathProgramCache]: Analyzing trace with hash -947856824, now seen corresponding path program 4 times [2020-11-28 07:25:08,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:25:08,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319034826] [2020-11-28 07:25:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:25:08,359 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:25:08,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796457243] [2020-11-28 07:25:08,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:25:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:25:08,502 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:25:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:25:08,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:25:08,686 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:25:08,686 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:25:08,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-11-28 07:25:09,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:25:09 BoogieIcfgContainer [2020-11-28 07:25:09,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:25:09,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:25:09,013 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:25:09,013 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:25:09,018 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:38" (3/4) ... [2020-11-28 07:25:09,020 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:25:09,137 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_efecc99f-1452-443c-a45a-8461eb60b802/bin/utaipan/witness.graphml [2020-11-28 07:25:09,137 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:25:09,138 INFO L168 Benchmark]: Toolchain (without parser) took 31797.55 ms. Allocated memory was 75.5 MB in the beginning and 134.2 MB in the end (delta: 58.7 MB). Free memory was 54.2 MB in the beginning and 42.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 71.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:09,138 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 75.5 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:09,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.91 ms. Allocated memory is still 75.5 MB. Free memory was 54.0 MB in the beginning and 52.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:09,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.19 ms. Allocated memory is still 75.5 MB. Free memory was 52.2 MB in the beginning and 50.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:09,139 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 ms. Allocated memory is still 75.5 MB. Free memory was 50.7 MB in the beginning and 49.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:25:09,140 INFO L168 Benchmark]: RCFGBuilder took 693.98 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.5 MB in the beginning and 65.7 MB in the end (delta: -16.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:09,141 INFO L168 Benchmark]: TraceAbstraction took 30632.67 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 65.3 MB in the beginning and 49.4 MB in the end (delta: 15.9 MB). Peak memory consumption was 57.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:09,141 INFO L168 Benchmark]: Witness Printer took 124.32 ms. Allocated memory is still 134.2 MB. Free memory was 49.4 MB in the beginning and 42.0 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:25:09,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 75.5 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.91 ms. Allocated memory is still 75.5 MB. Free memory was 54.0 MB in the beginning and 52.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.19 ms. Allocated memory is still 75.5 MB. Free memory was 52.2 MB in the beginning and 50.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.23 ms. Allocated memory is still 75.5 MB. Free memory was 50.7 MB in the beginning and 49.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 693.98 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.5 MB in the beginning and 65.7 MB in the end (delta: -16.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 30632.67 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 65.3 MB in the beginning and 49.4 MB in the end (delta: 15.9 MB). Peak memory consumption was 57.0 MB. Max. memory is 16.1 GB. * Witness Printer took 124.32 ms. Allocated memory is still 134.2 MB. Free memory was 49.4 MB in the beginning and 42.0 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) [L13] COND FALSE !(!cond) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.4s, OverallIterations: 9, TraceHistogramMax: 21, AutomataDifference: 12.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 97 SDslu, 231 SDs, 0 SdLazy, 194 SolverSat, 58 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 430 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=8, 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, 8 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 32045 SizeOfPredicates, 56 NumberOfNonLiveVariables, 722 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 9/964 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...