./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 308e43cca528a064aecd41d099b341627e43bb71 ............................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 308e43cca528a064aecd41d099b341627e43bb71 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4b72e2cd --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:48:59,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:48:59,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:48:59,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:48:59,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:48:59,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:48:59,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:48:59,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:48:59,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:48:59,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:48:59,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:48:59,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:48:59,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:48:59,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:48:59,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:48:59,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:48:59,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:48:59,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:48:59,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:48:59,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:48:59,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:48:59,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:48:59,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:48:59,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:48:59,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:48:59,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:48:59,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:48:59,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:48:59,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:48:59,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:48:59,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:48:59,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:48:59,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:48:59,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:48:59,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:48:59,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:48:59,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:48:59,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:48:59,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:48:59,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:48:59,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:48:59,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 21:48:59,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:48:59,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:48:59,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:48:59,499 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:48:59,499 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:48:59,500 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:48:59,500 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:48:59,500 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:48:59,500 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:48:59,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:48:59,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:48:59,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:48:59,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:48:59,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:48:59,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:48:59,504 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 308e43cca528a064aecd41d099b341627e43bb71 [2019-12-07 21:48:59,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:48:59,607 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:48:59,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:48:59,610 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:48:59,611 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:48:59,611 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test23-2.c [2019-12-07 21:48:59,650 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/609ef95fa/bf4a15e3dcf1471abc9c79093a68489f/FLAG61391bf49 [2019-12-07 21:49:00,060 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:49:00,060 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/sv-benchmarks/c/ldv-regression/test23-2.c [2019-12-07 21:49:00,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/609ef95fa/bf4a15e3dcf1471abc9c79093a68489f/FLAG61391bf49 [2019-12-07 21:49:00,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/609ef95fa/bf4a15e3dcf1471abc9c79093a68489f [2019-12-07 21:49:00,074 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:49:00,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:49:00,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:49:00,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:49:00,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:49:00,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@105309a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00, skipping insertion in model container [2019-12-07 21:49:00,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:49:00,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:49:00,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:49:00,255 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:49:00,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:49:00,278 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:49:00,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00 WrapperNode [2019-12-07 21:49:00,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:49:00,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:49:00,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:49:00,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:49:00,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:49:00,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:49:00,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:49:00,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:49:00,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... [2019-12-07 21:49:00,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:49:00,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:49:00,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:49:00,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:49:00,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 21:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:49:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 21:49:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 21:49:00,658 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:49:00,658 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 21:49:00,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:49:00 BoogieIcfgContainer [2019-12-07 21:49:00,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:49:00,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:49:00,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:49:00,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:49:00,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:49:00" (1/3) ... [2019-12-07 21:49:00,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cf0b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:49:00, skipping insertion in model container [2019-12-07 21:49:00,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:00" (2/3) ... [2019-12-07 21:49:00,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cf0b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:49:00, skipping insertion in model container [2019-12-07 21:49:00,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:49:00" (3/3) ... [2019-12-07 21:49:00,664 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-12-07 21:49:00,670 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:49:00,675 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:49:00,682 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:49:00,698 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:49:00,698 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:49:00,698 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:49:00,698 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:49:00,698 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:49:00,699 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:49:00,699 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:49:00,699 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:49:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 21:49:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 21:49:00,712 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:49:00,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 21:49:00,713 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:49:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:49:00,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1436432940, now seen corresponding path program 1 times [2019-12-07 21:49:00,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:49:00,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239247925] [2019-12-07 21:49:00,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:49:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:00,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239247925] [2019-12-07 21:49:00,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:49:00,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:49:00,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161033462] [2019-12-07 21:49:00,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 21:49:00,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:49:00,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 21:49:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:49:00,850 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-12-07 21:49:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:49:00,860 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-12-07 21:49:00,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:49:00,861 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-12-07 21:49:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:49:00,866 INFO L225 Difference]: With dead ends: 18 [2019-12-07 21:49:00,866 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 21:49:00,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:49:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 21:49:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 21:49:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 21:49:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-12-07 21:49:00,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-12-07 21:49:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:49:00,889 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-12-07 21:49:00,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 21:49:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-12-07 21:49:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 21:49:00,890 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:49:00,890 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:49:00,890 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:49:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:49:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1586973174, now seen corresponding path program 1 times [2019-12-07 21:49:00,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:49:00,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014253080] [2019-12-07 21:49:00,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:49:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:01,026 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (const Int) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1315) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1196) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.TermTransferrer.convertApplicationTerm(TermTransferrer.java:182) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:573) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:171) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:269) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:205) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 21:49:01,029 INFO L168 Benchmark]: Toolchain (without parser) took 954.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -77.9 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:01,029 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:49:01,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -151.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:01,030 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:49:01,031 INFO L168 Benchmark]: Boogie Preprocessor took 18.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:01,031 INFO L168 Benchmark]: RCFGBuilder took 335.43 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:01,032 INFO L168 Benchmark]: TraceAbstraction took 367.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:01,034 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 203.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -151.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 335.43 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 367.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (const Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (const Int): de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 21:49:02,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:49:02,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:49:02,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:49:02,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:49:02,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:49:02,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:49:02,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:49:02,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:49:02,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:49:02,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:49:02,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:49:02,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:49:02,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:49:02,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:49:02,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:49:02,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:49:02,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:49:02,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:49:02,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:49:02,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:49:02,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:49:02,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:49:02,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:49:02,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:49:02,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:49:02,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:49:02,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:49:02,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:49:02,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:49:02,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:49:02,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:49:02,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:49:02,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:49:02,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:49:02,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:49:02,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:49:02,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:49:02,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:49:02,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:49:02,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:49:02,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 21:49:02,531 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:49:02,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:49:02,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:49:02,532 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:49:02,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:49:02,532 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:49:02,532 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:49:02,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:49:02,532 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:49:02,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:49:02,533 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:49:02,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:49:02,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:49:02,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:49:02,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:49:02,534 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:49:02,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:49:02,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:49:02,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 21:49:02,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:49:02,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:49:02,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:49:02,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:49:02,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:49:02,537 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 308e43cca528a064aecd41d099b341627e43bb71 [2019-12-07 21:49:02,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:49:02,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:49:02,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:49:02,708 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:49:02,708 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:49:02,709 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test23-2.c [2019-12-07 21:49:02,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/bb434356f/e174451318e84eb8b7e049945aca9662/FLAG931e77c4b [2019-12-07 21:49:03,074 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:49:03,074 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/sv-benchmarks/c/ldv-regression/test23-2.c [2019-12-07 21:49:03,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/bb434356f/e174451318e84eb8b7e049945aca9662/FLAG931e77c4b [2019-12-07 21:49:03,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/data/bb434356f/e174451318e84eb8b7e049945aca9662 [2019-12-07 21:49:03,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:49:03,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:49:03,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:49:03,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:49:03,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:49:03,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f8af92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03, skipping insertion in model container [2019-12-07 21:49:03,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:49:03,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:49:03,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:49:03,232 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:49:03,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:49:03,285 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:49:03,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03 WrapperNode [2019-12-07 21:49:03,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:49:03,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:49:03,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:49:03,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:49:03,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:49:03,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:49:03,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:49:03,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:49:03,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... [2019-12-07 21:49:03,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:49:03,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:49:03,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:49:03,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:49:03,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:49:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 21:49:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:49:03,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:49:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 21:49:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 21:49:03,537 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:49:03,537 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 21:49:03,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:49:03 BoogieIcfgContainer [2019-12-07 21:49:03,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:49:03,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:49:03,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:49:03,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:49:03,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:49:03" (1/3) ... [2019-12-07 21:49:03,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f05718a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:49:03, skipping insertion in model container [2019-12-07 21:49:03,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:49:03" (2/3) ... [2019-12-07 21:49:03,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f05718a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:49:03, skipping insertion in model container [2019-12-07 21:49:03,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:49:03" (3/3) ... [2019-12-07 21:49:03,543 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-12-07 21:49:03,549 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:49:03,553 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:49:03,560 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:49:03,574 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:49:03,574 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:49:03,575 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:49:03,575 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:49:03,575 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:49:03,575 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:49:03,575 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:49:03,575 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:49:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-12-07 21:49:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 21:49:03,590 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:49:03,590 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:49:03,591 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:49:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:49:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2019-12-07 21:49:03,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:49:03,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008068624] [2019-12-07 21:49:03,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/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 [2019-12-07 21:49:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:03,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 21:49:03,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:03,676 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:03,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008068624] [2019-12-07 21:49:03,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:49:03,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 21:49:03,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244970653] [2019-12-07 21:49:03,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 21:49:03,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:49:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 21:49:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:49:03,694 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-12-07 21:49:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:49:03,705 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-12-07 21:49:03,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:49:03,706 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-12-07 21:49:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:49:03,712 INFO L225 Difference]: With dead ends: 30 [2019-12-07 21:49:03,712 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 21:49:03,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 21:49:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 21:49:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 21:49:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 21:49:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-12-07 21:49:03,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2019-12-07 21:49:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:49:03,736 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-12-07 21:49:03,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 21:49:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-12-07 21:49:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 21:49:03,737 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:49:03,737 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:49:03,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 21:49:03,938 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:49:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:49:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2019-12-07 21:49:03,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:49:03,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17976298] [2019-12-07 21:49:03,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/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 [2019-12-07 21:49:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:04,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 21:49:04,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:04,169 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 21:49:04,170 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:04,186 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:04,186 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:04,187 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-12-07 21:49:04,226 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-12-07 21:49:04,227 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:04,239 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:04,239 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:04,240 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2019-12-07 21:49:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:04,290 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:04,359 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2019-12-07 21:49:04,360 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:04,406 INFO L614 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2019-12-07 21:49:04,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:04,410 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:04,411 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2019-12-07 21:49:04,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:04,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17976298] [2019-12-07 21:49:04,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:49:04,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2019-12-07 21:49:04,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27239067] [2019-12-07 21:49:04,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 21:49:04,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:49:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 21:49:04,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-12-07 21:49:04,451 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 12 states. [2019-12-07 21:49:05,227 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-07 21:49:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:49:05,887 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2019-12-07 21:49:05,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 21:49:05,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-07 21:49:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:49:05,890 INFO L225 Difference]: With dead ends: 71 [2019-12-07 21:49:05,890 INFO L226 Difference]: Without dead ends: 66 [2019-12-07 21:49:05,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 21:49:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-07 21:49:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 21. [2019-12-07 21:49:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 21:49:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-12-07 21:49:05,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-12-07 21:49:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:49:05,900 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-12-07 21:49:05,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 21:49:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-12-07 21:49:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 21:49:05,901 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:49:05,901 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:49:06,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 21:49:06,102 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:49:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:49:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 1 times [2019-12-07 21:49:06,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:49:06,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067438176] [2019-12-07 21:49:06,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/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 [2019-12-07 21:49:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:06,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 21:49:06,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:06,248 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 21:49:06,248 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:06,259 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:06,260 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:06,260 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-12-07 21:49:06,464 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-12-07 21:49:06,465 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:06,479 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:06,479 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:06,479 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2019-12-07 21:49:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:06,542 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:06,864 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2019-12-07 21:49:06,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:06,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:06,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:06,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:06,868 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:06,944 INFO L614 ElimStorePlain]: treesize reduction 69, result has 34.9 percent of original size [2019-12-07 21:49:06,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:06,948 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:06,948 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:37 [2019-12-07 21:49:06,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:06,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067438176] [2019-12-07 21:49:06,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [933511905] [2019-12-07 21:49:06,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 21:49:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:07,076 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 21:49:07,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:07,410 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 21:49:07,411 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:07,428 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:07,429 INFO L534 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. [2019-12-07 21:49:07,429 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-12-07 21:49:07,803 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 21:49:07,805 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:07,805 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 15 [2019-12-07 21:49:07,806 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:07,820 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:07,821 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:07,821 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2019-12-07 21:49:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:07,868 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:07,877 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2019-12-07 21:49:07,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:07,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:07,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:07,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:07,881 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:07,953 INFO L614 ElimStorePlain]: treesize reduction 69, result has 34.9 percent of original size [2019-12-07 21:49:07,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:07,957 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:07,957 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:37 [2019-12-07 21:49:07,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:07,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869140852] [2019-12-07 21:49:07,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/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 [2019-12-07 21:49:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:49:08,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 21:49:08,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:08,109 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 21:49:08,109 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:08,128 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:08,129 INFO L534 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. [2019-12-07 21:49:08,129 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-12-07 21:49:08,221 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 21:49:08,223 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:08,223 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 15 [2019-12-07 21:49:08,224 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:08,239 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:08,240 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:08,240 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2019-12-07 21:49:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:08,244 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:08,253 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2019-12-07 21:49:08,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:08,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:08,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:08,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:08,256 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:08,332 INFO L614 ElimStorePlain]: treesize reduction 73, result has 36.0 percent of original size [2019-12-07 21:49:08,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:08,335 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:08,335 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:41 [2019-12-07 21:49:08,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:08,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 21:49:08,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 29 [2019-12-07 21:49:08,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385868907] [2019-12-07 21:49:08,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 21:49:08,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:49:08,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 21:49:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2019-12-07 21:49:08,371 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 29 states. [2019-12-07 21:49:10,960 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-12-07 21:49:11,170 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2019-12-07 21:49:11,378 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2019-12-07 21:49:11,591 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2019-12-07 21:49:11,830 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-12-07 21:49:12,117 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-12-07 21:49:12,377 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-07 21:49:12,676 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2019-12-07 21:49:13,528 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2019-12-07 21:49:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:49:15,181 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2019-12-07 21:49:15,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-12-07 21:49:15,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 20 [2019-12-07 21:49:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:49:15,183 INFO L225 Difference]: With dead ends: 103 [2019-12-07 21:49:15,183 INFO L226 Difference]: Without dead ends: 98 [2019-12-07 21:49:15,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1282, Invalid=5524, Unknown=0, NotChecked=0, Total=6806 [2019-12-07 21:49:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-07 21:49:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 29. [2019-12-07 21:49:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 21:49:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-12-07 21:49:15,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2019-12-07 21:49:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:49:15,192 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-12-07 21:49:15,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 21:49:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-12-07 21:49:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 21:49:15,193 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:49:15,193 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:49:15,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:49:15,796 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:49:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:49:15,796 INFO L82 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 2 times [2019-12-07 21:49:15,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:49:15,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820811995] [2019-12-07 21:49:15,797 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/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 [2019-12-07 21:49:15,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 21:49:15,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:49:15,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 21:49:15,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:15,925 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 21:49:15,925 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:15,937 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:15,938 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:15,938 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-12-07 21:49:16,376 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-12-07 21:49:16,377 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:16,388 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:16,388 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:49:16,389 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2019-12-07 21:49:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:16,466 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:17,279 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2019-12-07 21:49:17,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:17,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:17,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:17,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:17,281 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:17,347 INFO L614 ElimStorePlain]: treesize reduction 69, result has 34.9 percent of original size [2019-12-07 21:49:17,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:17,350 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:49:17,350 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:37 [2019-12-07 21:49:17,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:49:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:17,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820811995] [2019-12-07 21:49:17,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443812101] [2019-12-07 21:49:17,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 21:49:17,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 21:49:17,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:49:17,507 WARN L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-07 21:49:17,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:18,001 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 21:49:18,001 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:49:18,032 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:49:18,033 INFO L534 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. [2019-12-07 21:49:18,033 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:47 [2019-12-07 21:49:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:49:19,834 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:49:23,154 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2019-12-07 21:49:23,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18448303] [2019-12-07 21:49:23,155 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef3bcd1e-ec7b-4346-93dc-1d54611c5ec7/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 [2019-12-07 21:49:23,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 21:49:23,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:49:23,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 21:49:23,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:49:23,211 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4b72e2cd [2019-12-07 21:49:23,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 21:49:23,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2019-12-07 21:49:23,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671890748] [2019-12-07 21:49:23,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 21:49:23,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:49:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 21:49:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 21:49:23,213 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 26 states. [2019-12-07 21:49:23,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:49:23,814 WARN L499 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 --rewrite-divk [2019-12-07 21:49:23,816 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4b72e2cd at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 21:49:23,824 INFO L168 Benchmark]: Toolchain (without parser) took 20733.63 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 305.7 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -264.1 MB). Peak memory consumption was 41.6 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:23,824 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:49:23,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:23,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:49:23,826 INFO L168 Benchmark]: Boogie Preprocessor took 18.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:23,827 INFO L168 Benchmark]: RCFGBuilder took 207.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:23,827 INFO L168 Benchmark]: TraceAbstraction took 20282.75 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -120.9 MB). Peak memory consumption was 57.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:49:23,829 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 195.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 207.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20282.75 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -120.9 MB). Peak memory consumption was 57.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4b72e2cd de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@4b72e2cd: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...