./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/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 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/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 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:06:03,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:06:03,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:06:03,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:06:03,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:06:03,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:06:03,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:06:03,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:06:03,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:06:03,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:06:03,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:06:03,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:06:03,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:06:03,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:06:03,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:06:03,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:06:03,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:06:03,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:06:03,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:06:03,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:06:03,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:06:03,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:06:03,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:06:03,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:06:03,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:06:03,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:06:03,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:06:03,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:06:03,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:06:03,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:06:03,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:06:03,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:06:03,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:06:03,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:06:03,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:06:03,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:06:03,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:06:03,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:06:03,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:06:03,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:06:03,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:06:03,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:06:03,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:06:03,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:06:03,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:06:03,411 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:06:03,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:06:03,411 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:06:03,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:06:03,412 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:06:03,412 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:06:03,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:06:03,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:06:03,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:06:03,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:06:03,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:06:03,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:06:03,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:06:03,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:06:03,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:06:03,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:06:03,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:06:03,415 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_9cf3c210-de02-4c66-8c42-224b70733fd3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 [2020-12-09 09:06:03,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:06:03,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:06:03,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:06:03,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:06:03,609 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:06:03,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/../../sv-benchmarks/c/array-fpi/sqm-if.c [2020-12-09 09:06:03,650 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/4170d1501/959becf16ab5420098be227319992d59/FLAG91e6fbed3 [2020-12-09 09:06:04,020 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:06:04,020 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/sv-benchmarks/c/array-fpi/sqm-if.c [2020-12-09 09:06:04,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/4170d1501/959becf16ab5420098be227319992d59/FLAG91e6fbed3 [2020-12-09 09:06:04,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/4170d1501/959becf16ab5420098be227319992d59 [2020-12-09 09:06:04,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:06:04,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:06:04,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:04,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:06:04,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:06:04,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7cee70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04, skipping insertion in model container [2020-12-09 09:06:04,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:06:04,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:06:04,154 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2020-12-09 09:06:04,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:04,173 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:06:04,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2020-12-09 09:06:04,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:04,197 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:06:04,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04 WrapperNode [2020-12-09 09:06:04,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:04,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:04,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:06:04,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:06:04,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:04,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:06:04,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:06:04,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:06:04,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... [2020-12-09 09:06:04,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:06:04,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:06:04,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:06:04,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:06:04,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:06:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:06:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:06:04,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 09:06:04,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:06:04,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:06:04,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:06:04,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 09:06:04,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:06:04,624 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 09:06:04,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:04 BoogieIcfgContainer [2020-12-09 09:06:04,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:06:04,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:06:04,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:06:04,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:06:04,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:06:04" (1/3) ... [2020-12-09 09:06:04,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7419ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:04, skipping insertion in model container [2020-12-09 09:06:04,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:04" (2/3) ... [2020-12-09 09:06:04,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7419ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:04, skipping insertion in model container [2020-12-09 09:06:04,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:04" (3/3) ... [2020-12-09 09:06:04,633 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2020-12-09 09:06:04,646 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:06:04,650 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:06:04,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:06:04,676 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:06:04,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:06:04,677 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:06:04,677 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:06:04,677 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:06:04,677 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:06:04,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:06:04,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:06:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 09:06:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:06:04,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:04,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:04,691 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2020-12-09 09:06:04,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:06:04,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492433528] [2020-12-09 09:06:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:06:04,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:06:04,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980232266] [2020-12-09 09:06:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:06:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:04,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:04,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492433528] [2020-12-09 09:06:04,925 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:04,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980232266] [2020-12-09 09:06:04,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:04,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 09:06:04,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256664462] [2020-12-09 09:06:04,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:06:04,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:06:04,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:06:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:06:04,945 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-09 09:06:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:05,008 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-12-09 09:06:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:06:05,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 09:06:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:05,015 INFO L225 Difference]: With dead ends: 20 [2020-12-09 09:06:05,015 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 09:06:05,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:06:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 09:06:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 09:06:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 09:06:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-09 09:06:05,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-09 09:06:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:05,037 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-09 09:06:05,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:06:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-09 09:06:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:06:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:05,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:05,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 09:06:05,239 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:05,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2020-12-09 09:06:05,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:06:05,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210858878] [2020-12-09 09:06:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:06:05,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:06:05,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713928244] [2020-12-09 09:06:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:06:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:06:05,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:06:05,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210858878] [2020-12-09 09:06:05,326 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:05,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713928244] [2020-12-09 09:06:05,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:05,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 09:06:05,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485037722] [2020-12-09 09:06:05,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:06:05,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:06:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:06:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:06:05,328 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2020-12-09 09:06:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:05,367 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 09:06:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:06:05,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 09:06:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:05,368 INFO L225 Difference]: With dead ends: 21 [2020-12-09 09:06:05,368 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 09:06:05,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:06:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 09:06:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-12-09 09:06:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 09:06:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 09:06:05,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 09:06:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:05,372 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 09:06:05,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:06:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 09:06:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 09:06:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:05,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:05,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:05,574 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2020-12-09 09:06:05,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:06:05,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434701483] [2020-12-09 09:06:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:06:05,632 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:06:05,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257690176] [2020-12-09 09:06:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 09:06:05,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:05,722 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 09:06:05,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:06:05,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:06:05,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:06:05,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 09:06:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:05,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:05,767 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 09:06:05,768 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:06:05,813 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:06:05,815 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:06:05,820 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:06:05,827 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:06:05,854 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:06:05,855 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 49 [2020-12-09 09:06:05,856 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 09:06:05,860 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_1], 2=[v_arrayElimCell_2]} [2020-12-09 09:06:05,878 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse3 (< 2147483647 .cse14)) (.cse8 (< 2147483647 .cse13)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse5 (<= .cse14 2147483647)) (.cse4 (<= .cse13 2147483647))) (and (or .cse0 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse1 (select v_prenex_13 v_prenex_12))) (store .cse1 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_14) (let ((.cse2 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_13 v_prenex_11) (+ v_prenex_15 .cse2 (- 34359738368))) (select .cse1 (+ v_prenex_14 .cse2 (- 34359738368))) 2)))) v_prenex_14) 1)) .cse3 .cse4) (or .cse0 .cse5 (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse6 (select v_prenex_3 v_prenex_2))) (store .cse6 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_4 (- 34359738368)) (let ((.cse7 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse6 (+ v_prenex_4 .cse7)) (select (select v_prenex_3 v_prenex_1) (+ v_prenex_5 .cse7)) 2)))) v_prenex_4) 1)) .cse8) (or .cse0 (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse9 (select v_prenex_8 v_prenex_7))) (store .cse9 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_9) (let ((.cse10 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse9 (+ .cse10 v_prenex_9)) (select (select v_prenex_8 v_prenex_6) (+ .cse10 v_prenex_10)) 2)))) v_prenex_9) 1)) .cse3 .cse8) (or .cse0 (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse11 (select |#memory_int| ULTIMATE.start_main_~a~0.base))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~a~0.offset (- 34359738368)) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select |#memory_int| ULTIMATE.start_main_~b~0.base) (+ .cse12 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select .cse11 (+ ULTIMATE.start_main_~a~0.offset .cse12 (- 34359738368))) 2)))) ULTIMATE.start_main_~a~0.offset) 1)) .cse5 .cse4)))) is different from false [2020-12-09 09:06:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2020-12-09 09:06:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434701483] [2020-12-09 09:06:05,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257690176] [2020-12-09 09:06:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787514579] [2020-12-09 09:06:05,903 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 09:06:05,903 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:06:05,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:06:05,910 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:06:05,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:06:06,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:06,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:07,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:07,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:07,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:07,087 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:06:09,239 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-09 09:06:09,370 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 09:06:09,506 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 09:06:09,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:09,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 09:06:09,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2020-12-09 09:06:09,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225822876] [2020-12-09 09:06:09,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 09:06:09,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:06:09,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 09:06:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2020-12-09 09:06:09,691 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2020-12-09 09:06:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:09,968 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-09 09:06:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 09:06:09,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-09 09:06:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:09,970 INFO L225 Difference]: With dead ends: 39 [2020-12-09 09:06:09,970 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 09:06:09,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=132, Invalid=471, Unknown=1, NotChecked=46, Total=650 [2020-12-09 09:06:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 09:06:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2020-12-09 09:06:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 09:06:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 09:06:09,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2020-12-09 09:06:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:09,974 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 09:06:09,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 09:06:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 09:06:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 09:06:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:09,975 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:10,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:10,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2020-12-09 09:06:10,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:06:10,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321609122] [2020-12-09 09:06:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:06:10,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:06:10,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500965744] [2020-12-09 09:06:10,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:10,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 09:06:10,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:06:10,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:06:10,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:10,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:10,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321609122] [2020-12-09 09:06:10,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:10,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500965744] [2020-12-09 09:06:10,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583330941] [2020-12-09 09:06:10,334 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 09:06:10,334 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:06:10,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:06:10,334 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:06:10,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:06:10,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:10,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:11,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:11,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:11,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:11,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:11,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:06:11,173 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:06:11,285 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-09 09:06:11,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:11,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 09:06:11,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-09 09:06:11,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095748302] [2020-12-09 09:06:11,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 09:06:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:06:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 09:06:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-09 09:06:11,647 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2020-12-09 09:06:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:11,730 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 09:06:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:06:11,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 09:06:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:11,731 INFO L225 Difference]: With dead ends: 35 [2020-12-09 09:06:11,731 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 09:06:11,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-09 09:06:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 09:06:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2020-12-09 09:06:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 09:06:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 09:06:11,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-09 09:06:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:11,734 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 09:06:11,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 09:06:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 09:06:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:06:11,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:11,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:11,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:11,936 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2020-12-09 09:06:11,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:06:11,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489162945] [2020-12-09 09:06:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:06:11,986 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 09:06:11,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491900992] [2020-12-09 09:06:11,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:12,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 09:06:12,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:06:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 09:06:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:06:12,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489162945] [2020-12-09 09:06:12,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:06:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491900992] [2020-12-09 09:06:12,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 09:06:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488737739] [2020-12-09 09:06:12,350 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 09:06:12,350 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:06:12,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:06:12,351 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:06:12,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:06:12,356 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4288c417 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 09:06:12,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:12,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 09:06:12,357 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 09:06:12,357 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:06:12,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:06:12,564 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,565 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,565 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,565 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,565 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,565 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,565 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,565 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,565 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,566 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,566 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,566 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,566 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 09:06:12,566 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 09:06:12,576 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 09:06:12,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:06:12 BoogieIcfgContainer [2020-12-09 09:06:12,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:06:12,577 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:06:12,577 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:06:12,577 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:06:12,577 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:04" (3/4) ... [2020-12-09 09:06:12,581 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:06:12,581 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:06:12,582 INFO L168 Benchmark]: Toolchain (without parser) took 8544.06 ms. Allocated memory was 94.4 MB in the beginning and 167.8 MB in the end (delta: 73.4 MB). Free memory was 54.3 MB in the beginning and 78.0 MB in the end (delta: -23.7 MB). Peak memory consumption was 50.9 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:12,582 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 94.4 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:12,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.49 ms. Allocated memory is still 94.4 MB. Free memory was 54.2 MB in the beginning and 68.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:12,583 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.32 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 66.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:12,584 INFO L168 Benchmark]: Boogie Preprocessor took 22.98 ms. Allocated memory is still 94.4 MB. Free memory was 66.4 MB in the beginning and 65.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:12,584 INFO L168 Benchmark]: RCFGBuilder took 379.16 ms. Allocated memory is still 94.4 MB. Free memory was 65.3 MB in the beginning and 53.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:12,585 INFO L168 Benchmark]: TraceAbstraction took 7948.83 ms. Allocated memory was 94.4 MB in the beginning and 167.8 MB in the end (delta: 73.4 MB). Free memory was 53.3 MB in the beginning and 79.1 MB in the end (delta: -25.8 MB). Peak memory consumption was 48.3 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:12,585 INFO L168 Benchmark]: Witness Printer took 4.06 ms. Allocated memory is still 167.8 MB. Free memory is still 78.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:12,588 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 94.4 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 159.49 ms. Allocated memory is still 94.4 MB. Free memory was 54.2 MB in the beginning and 68.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.32 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 66.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.98 ms. Allocated memory is still 94.4 MB. Free memory was 66.4 MB in the beginning and 65.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 379.16 ms. Allocated memory is still 94.4 MB. Free memory was 65.3 MB in the beginning and 53.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7948.83 ms. Allocated memory was 94.4 MB in the beginning and 167.8 MB in the end (delta: 73.4 MB). Free memory was 53.3 MB in the beginning and 79.1 MB in the end (delta: -25.8 MB). Peak memory consumption was 48.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.06 ms. Allocated memory is still 167.8 MB. Free memory is still 78.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/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 -> 7afcdeb760fbbbe9bd1f8afdec1f2ad91ffc82c5 [2020-12-09 09:06:14,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:06:14,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:06:14,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:06:14,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:06:14,467 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:06:14,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/../../sv-benchmarks/c/array-fpi/sqm-if.c [2020-12-09 09:06:14,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/af668fef9/9a972e15adf54425a39309c3ca7a96c1/FLAGab6b283b6 [2020-12-09 09:06:14,885 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:06:14,886 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/sv-benchmarks/c/array-fpi/sqm-if.c [2020-12-09 09:06:14,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/af668fef9/9a972e15adf54425a39309c3ca7a96c1/FLAGab6b283b6 [2020-12-09 09:06:14,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/data/af668fef9/9a972e15adf54425a39309c3ca7a96c1 [2020-12-09 09:06:14,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:06:14,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:06:14,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:14,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:06:14,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:06:14,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:14" (1/1) ... [2020-12-09 09:06:14,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c97cfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:14, skipping insertion in model container [2020-12-09 09:06:14,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:06:14" (1/1) ... [2020-12-09 09:06:14,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:06:14,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:06:15,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2020-12-09 09:06:15,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:15,064 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:06:15,079 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2020-12-09 09:06:15,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:06:15,105 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:06:15,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15 WrapperNode [2020-12-09 09:06:15,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:06:15,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:15,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:06:15,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:06:15,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:06:15,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:06:15,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:06:15,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:06:15,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... [2020-12-09 09:06:15,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:06:15,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:06:15,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:06:15,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:06:15,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:06:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 09:06:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:06:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2020-12-09 09:06:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:06:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:06:15,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:06:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2020-12-09 09:06:15,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:06:15,594 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 09:06:15,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:15 BoogieIcfgContainer [2020-12-09 09:06:15,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:06:15,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:06:15,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:06:15,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:06:15,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:06:14" (1/3) ... [2020-12-09 09:06:15,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a073a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:15, skipping insertion in model container [2020-12-09 09:06:15,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:06:15" (2/3) ... [2020-12-09 09:06:15,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a073a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:06:15, skipping insertion in model container [2020-12-09 09:06:15,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:15" (3/3) ... [2020-12-09 09:06:15,600 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2020-12-09 09:06:15,610 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:06:15,612 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:06:15,619 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:06:15,635 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:06:15,635 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:06:15,636 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:06:15,636 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:06:15,636 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:06:15,636 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:06:15,636 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:06:15,636 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:06:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 09:06:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 09:06:15,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:15,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:15,648 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-12-09 09:06:15,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:15,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247536973] [2020-12-09 09:06:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 09:06:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 09:06:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:15,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:06:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247536973] [2020-12-09 09:06:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:15,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:06:15,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048161123] [2020-12-09 09:06:15,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 09:06:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:06:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 09:06:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 09:06:15,828 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-09 09:06:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:15,841 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-09 09:06:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 09:06:15,843 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 09:06:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:15,850 INFO L225 Difference]: With dead ends: 42 [2020-12-09 09:06:15,851 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 09:06:15,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 09:06:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 09:06:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 09:06:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 09:06:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-09 09:06:15,883 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-09 09:06:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:15,884 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-09 09:06:15,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 09:06:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-09 09:06:15,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 09:06:15,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:15,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:16,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 09:06:16,086 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-12-09 09:06:16,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:16,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572792790] [2020-12-09 09:06:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 09:06:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:16,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:06:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:16,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:06:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572792790] [2020-12-09 09:06:16,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:16,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 09:06:16,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044791519] [2020-12-09 09:06:16,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:06:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:06:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:06:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:06:16,288 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-09 09:06:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:16,582 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-09 09:06:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:06:16,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 09:06:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:16,589 INFO L225 Difference]: With dead ends: 45 [2020-12-09 09:06:16,589 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 09:06:16,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:06:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 09:06:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-09 09:06:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 09:06:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 09:06:16,597 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-09 09:06:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:16,597 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 09:06:16,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:06:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 09:06:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 09:06:16,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:16,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:16,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 09:06:16,800 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-12-09 09:06:16,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:16,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933009272] [2020-12-09 09:06:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 09:06:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:16,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 09:06:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:16,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:17,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:17,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 09:06:17,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:06:17,017 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:06:17,018 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:06:17,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2020-12-09 09:06:17,073 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 09:06:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 09:06:17,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:06:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933009272] [2020-12-09 09:06:17,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:17,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 09:06:17,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717196408] [2020-12-09 09:06:17,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 09:06:17,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:06:17,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 09:06:17,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:06:17,093 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-12-09 09:06:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:17,428 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-09 09:06:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 09:06:17,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 09:06:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:17,430 INFO L225 Difference]: With dead ends: 40 [2020-12-09 09:06:17,430 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 09:06:17,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 09:06:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 09:06:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-09 09:06:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 09:06:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-09 09:06:17,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-12-09 09:06:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:17,438 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-09 09:06:17,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 09:06:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-09 09:06:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 09:06:17,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:17,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:17,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 09:06:17,641 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2020-12-09 09:06:17,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:17,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218453908] [2020-12-09 09:06:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 09:06:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 09:06:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:17,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218453908] [2020-12-09 09:06:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371223108] [2020-12-09 09:06:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:06:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 09:06:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:06:18,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:06:18,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2020-12-09 09:06:18,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377009866] [2020-12-09 09:06:18,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 09:06:18,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:06:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 09:06:18,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-09 09:06:18,390 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2020-12-09 09:06:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:06:19,047 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-12-09 09:06:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 09:06:19,052 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-09 09:06:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:06:19,053 INFO L225 Difference]: With dead ends: 60 [2020-12-09 09:06:19,053 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 09:06:19,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-12-09 09:06:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 09:06:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-12-09 09:06:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 09:06:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 09:06:19,057 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-12-09 09:06:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:06:19,057 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 09:06:19,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 09:06:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 09:06:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 09:06:19,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:06:19,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:06:19,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2020-12-09 09:06:19,461 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:06:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:06:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2020-12-09 09:06:19,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:06:19,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476616477] [2020-12-09 09:06:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 09:06:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:19,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 09:06:19,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 09:06:19,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:06:19,689 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:06:19,690 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:06:19,690 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-12-09 09:06:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 09:06:19,763 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 09:06:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 09:06:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 09:06:19,765 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 09:06:19,798 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2020-12-09 09:06:19,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 169 [2020-12-09 09:06:19,803 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:06:19,881 INFO L625 ElimStorePlain]: treesize reduction 97, result has 59.9 percent of original size [2020-12-09 09:06:19,882 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 09:06:19,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:191, output treesize:145 [2020-12-09 09:06:20,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 09:06:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 09:06:20,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:06:20,939 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 09:06:26,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476616477] [2020-12-09 09:06:26,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 09:06:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2124247255] [2020-12-09 09:06:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:06:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:26,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 09:06:26,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:26,339 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@657ad191 [2020-12-09 09:06:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180834749] [2020-12-09 09:06:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cf3c210-de02-4c66-8c42-224b70733fd3/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 [2020-12-09 09:06:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:06:26,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 09:06:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:06:26,452 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@657ad191 [2020-12-09 09:06:26,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:06:26,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 09:06:26,452 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 09:06:26,452 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:06:27,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 09:06:27,074 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 09:06:27,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:06:27 BoogieIcfgContainer [2020-12-09 09:06:27,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:06:27,075 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:06:27,075 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:06:27,075 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:06:27,075 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:06:15" (3/4) ... [2020-12-09 09:06:27,077 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:06:27,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:06:27,078 INFO L168 Benchmark]: Toolchain (without parser) took 12171.22 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.3 MB in the beginning and 37.3 MB in the end (delta: -7.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:27,079 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 52.4 MB. Free memory was 35.4 MB in the beginning and 35.4 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:27,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.12 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.0 MB in the beginning and 50.5 MB in the end (delta: -20.5 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:27,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.63 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 48.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:27,080 INFO L168 Benchmark]: Boogie Preprocessor took 21.81 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 47.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:27,081 INFO L168 Benchmark]: RCFGBuilder took 438.58 ms. Allocated memory is still 67.1 MB. Free memory was 47.3 MB in the beginning and 46.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:27,081 INFO L168 Benchmark]: TraceAbstraction took 11478.64 ms. Allocated memory is still 67.1 MB. Free memory was 45.8 MB in the beginning and 37.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:06:27,081 INFO L168 Benchmark]: Witness Printer took 2.83 ms. Allocated memory is still 67.1 MB. Free memory was 37.8 MB in the beginning and 37.3 MB in the end (delta: 490.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:06:27,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 52.4 MB. Free memory was 35.4 MB in the beginning and 35.4 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 198.12 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 30.0 MB in the beginning and 50.5 MB in the end (delta: -20.5 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.63 ms. Allocated memory is still 67.1 MB. Free memory was 50.4 MB in the beginning and 48.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.81 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 47.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 438.58 ms. Allocated memory is still 67.1 MB. Free memory was 47.3 MB in the beginning and 46.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11478.64 ms. Allocated memory is still 67.1 MB. Free memory was 45.8 MB in the beginning and 37.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. * Witness Printer took 2.83 ms. Allocated memory is still 67.1 MB. Free memory was 37.8 MB in the beginning and 37.3 MB in the end (delta: 490.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i