./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/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 ed4d18349810257ce078dfe4f08b9b953ed4516f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/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 ed4d18349810257ce078dfe4f08b9b953ed4516f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:30:38,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:30:38,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:30:38,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:30:38,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:30:38,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:30:38,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:30:38,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:30:38,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:30:38,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:30:38,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:30:38,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:30:38,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:30:38,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:30:38,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:30:38,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:30:38,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:30:38,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:30:38,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:30:38,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:30:38,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:30:38,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:30:38,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:30:38,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:30:38,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:30:38,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:30:38,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:30:38,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:30:38,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:30:38,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:30:38,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:30:38,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:30:38,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:30:38,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:30:38,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:30:38,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:30:38,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:30:38,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:30:38,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:30:38,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:30:38,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:30:38,998 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:30:39,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:30:39,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:30:39,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:30:39,033 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:30:39,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:30:39,034 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:30:39,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:30:39,034 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:30:39,034 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:30:39,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:30:39,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:30:39,035 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:30:39,035 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:30:39,035 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:30:39,036 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:30:39,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:30:39,037 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:30:39,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:30:39,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:30:39,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:30:39,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:30:39,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:30:39,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:30:39,038 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:30:39,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:30:39,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:30:39,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:30:39,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:30:39,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:30:39,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:30:39,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:30:39,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:30:39,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:30:39,040 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:30:39,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:30:39,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:30:39,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:30:39,041 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_095f5971-20d2-4b27-8fab-67c9ebb46e64/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 -> ed4d18349810257ce078dfe4f08b9b953ed4516f [2019-11-26 02:30:39,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:30:39,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:30:39,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:30:39,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:30:39,224 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:30:39,228 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-11-26 02:30:39,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/7bddb48be/94272e364c874d88b438475b81247ae6/FLAG345693ee0 [2019-11-26 02:30:39,716 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:30:39,717 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-11-26 02:30:39,731 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/7bddb48be/94272e364c874d88b438475b81247ae6/FLAG345693ee0 [2019-11-26 02:30:39,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/7bddb48be/94272e364c874d88b438475b81247ae6 [2019-11-26 02:30:39,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:30:39,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:30:39,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:30:39,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:30:39,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:30:39,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:30:39" (1/1) ... [2019-11-26 02:30:39,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:39, skipping insertion in model container [2019-11-26 02:30:39,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:30:39" (1/1) ... [2019-11-26 02:30:39,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:30:39,797 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:30:40,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:30:40,252 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:30:40,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:30:40,355 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:30:40,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40 WrapperNode [2019-11-26 02:30:40,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:30:40,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:30:40,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:30:40,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:30:40,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:30:40,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:30:40,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:30:40,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:30:40,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... [2019-11-26 02:30:40,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:30:40,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:30:40,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:30:40,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:30:40,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/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 [2019-11-26 02:30:40,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:30:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:30:40,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:30:40,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:30:40,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:30:40,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:30:40,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:30:40,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:30:41,186 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:30:41,186 INFO L284 CfgBuilder]: Removed 26 assume(true) statements. [2019-11-26 02:30:41,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:30:41 BoogieIcfgContainer [2019-11-26 02:30:41,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:30:41,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:30:41,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:30:41,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:30:41,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:30:39" (1/3) ... [2019-11-26 02:30:41,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c12a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:30:41, skipping insertion in model container [2019-11-26 02:30:41,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:30:40" (2/3) ... [2019-11-26 02:30:41,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c12a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:30:41, skipping insertion in model container [2019-11-26 02:30:41,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:30:41" (3/3) ... [2019-11-26 02:30:41,194 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2019-11-26 02:30:41,207 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:30:41,214 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:30:41,224 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:30:41,247 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:30:41,247 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:30:41,248 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:30:41,248 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:30:41,248 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:30:41,248 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:30:41,248 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:30:41,248 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:30:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-26 02:30:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:30:41,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:30:41,270 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:30:41,271 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:30:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:30:41,276 INFO L82 PathProgramCache]: Analyzing trace with hash 896114023, now seen corresponding path program 1 times [2019-11-26 02:30:41,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:30:41,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637514086] [2019-11-26 02:30:41,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:30:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:30:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:30:41,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637514086] [2019-11-26 02:30:41,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:30:41,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:30:41,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920498224] [2019-11-26 02:30:41,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:30:41,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:30:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:30:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:30:41,474 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-26 02:30:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:30:41,538 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2019-11-26 02:30:41,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:30:41,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-26 02:30:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:30:41,548 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:30:41,548 INFO L226 Difference]: Without dead ends: 13 [2019-11-26 02:30:41,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:30:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-26 02:30:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-26 02:30:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-26 02:30:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-26 02:30:41,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-11-26 02:30:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:30:41,591 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-26 02:30:41,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:30:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-26 02:30:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:30:41,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:30:41,592 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:30:41,593 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:30:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:30:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -877678715, now seen corresponding path program 1 times [2019-11-26 02:30:41,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:30:41,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119739226] [2019-11-26 02:30:41,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:30:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:30:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:30:41,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119739226] [2019-11-26 02:30:41,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:30:41,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:30:41,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050197465] [2019-11-26 02:30:41,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:30:41,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:30:41,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:30:41,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:30:41,731 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2019-11-26 02:30:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:30:41,766 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2019-11-26 02:30:41,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:30:41,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-26 02:30:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:30:41,768 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:30:41,768 INFO L226 Difference]: Without dead ends: 19 [2019-11-26 02:30:41,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:30:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-26 02:30:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2019-11-26 02:30:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-26 02:30:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-11-26 02:30:41,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2019-11-26 02:30:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:30:41,773 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-26 02:30:41,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:30:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-11-26 02:30:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:30:41,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:30:41,774 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:30:41,774 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:30:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:30:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1071153854, now seen corresponding path program 1 times [2019-11-26 02:30:41,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:30:41,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717692870] [2019-11-26 02:30:41,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:30:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:30:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:30:41,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717692870] [2019-11-26 02:30:41,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388532238] [2019-11-26 02:30:41,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:30:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:30:42,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:30:42,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:30:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:30:42,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:30:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:30:42,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924012920] [2019-11-26 02:30:42,151 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-26 02:30:42,154 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:30:42,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:30:42,176 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:30:42,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:30:42,375 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:42,913 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:43,300 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:43,547 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:43,955 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:44,549 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:44,776 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:45,439 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:30:45,486 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:30:46,404 WARN L192 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 108 [2019-11-26 02:30:46,710 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2019-11-26 02:30:48,238 WARN L192 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 205 DAG size of output: 159 [2019-11-26 02:30:50,024 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 192 DAG size of output: 143 [2019-11-26 02:30:50,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:30:50,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 12 [2019-11-26 02:30:50,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306086287] [2019-11-26 02:30:50,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:30:50,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:30:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:30:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:30:50,032 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 7 states. [2019-11-26 02:30:50,306 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 77 [2019-11-26 02:30:50,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:30:50,523 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-11-26 02:30:50,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:30:50,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-26 02:30:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:30:50,524 INFO L225 Difference]: With dead ends: 20 [2019-11-26 02:30:50,524 INFO L226 Difference]: Without dead ends: 15 [2019-11-26 02:30:50,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:30:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-26 02:30:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-26 02:30:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:30:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2019-11-26 02:30:50,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2019-11-26 02:30:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:30:50,530 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2019-11-26 02:30:50,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:30:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2019-11-26 02:30:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:30:50,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:30:50,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:30:50,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:30:50,734 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:30:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:30:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1442698977, now seen corresponding path program 1 times [2019-11-26 02:30:50,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:30:50,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631114681] [2019-11-26 02:30:50,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:30:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:30:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:30:50,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631114681] [2019-11-26 02:30:50,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:30:50,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:30:50,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95497002] [2019-11-26 02:30:50,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:30:50,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:30:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:30:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:30:50,820 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 4 states. [2019-11-26 02:30:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:30:50,868 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-11-26 02:30:50,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:30:50,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-26 02:30:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:30:50,869 INFO L225 Difference]: With dead ends: 29 [2019-11-26 02:30:50,870 INFO L226 Difference]: Without dead ends: 22 [2019-11-26 02:30:50,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:30:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-26 02:30:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2019-11-26 02:30:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-26 02:30:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2019-11-26 02:30:50,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2019-11-26 02:30:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:30:50,877 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2019-11-26 02:30:50,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:30:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2019-11-26 02:30:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:30:50,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:30:50,878 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:30:50,878 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:30:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:30:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash -254145272, now seen corresponding path program 2 times [2019-11-26 02:30:50,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:30:50,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883110417] [2019-11-26 02:30:50,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:30:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:30:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:30:51,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883110417] [2019-11-26 02:30:51,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950066117] [2019-11-26 02:30:51,341 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:30:51,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-26 02:30:51,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:30:51,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 90 conjunts are in the unsatisfiable core [2019-11-26 02:30:51,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:30:51,884 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-11-26 02:30:54,032 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2019-11-26 02:30:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:30:54,456 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:30:57,910 WARN L192 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-26 02:30:58,212 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-26 02:30:58,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:30:58,784 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.(DerPreprocessor.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:291) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.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.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) 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.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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) [2019-11-26 02:30:58,787 INFO L168 Benchmark]: Toolchain (without parser) took 19039.22 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 307.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -165.3 MB). Peak memory consumption was 142.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:30:58,788 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:30:58,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:30:58,789 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.99 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:30:58,789 INFO L168 Benchmark]: Boogie Preprocessor took 30.23 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. [2019-11-26 02:30:58,789 INFO L168 Benchmark]: RCFGBuilder took 739.06 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: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:30:58,790 INFO L168 Benchmark]: TraceAbstraction took 17597.98 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 159.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -40.5 MB). Peak memory consumption was 118.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:30:58,792 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 607.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 60.99 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.23 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. * RCFGBuilder took 739.06 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: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17597.98 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 159.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -40.5 MB). Peak memory consumption was 118.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:31:00,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:31:00,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:31:00,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:31:00,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:31:00,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:31:00,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:31:00,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:31:00,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:31:00,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:31:00,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:31:00,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:31:00,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:31:00,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:31:00,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:31:00,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:31:00,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:31:00,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:31:00,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:31:00,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:31:00,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:31:00,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:31:00,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:31:00,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:31:00,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:31:00,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:31:00,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:31:00,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:31:00,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:31:00,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:31:00,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:31:00,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:31:00,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:31:00,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:31:00,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:31:00,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:31:00,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:31:00,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:31:00,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:31:00,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:31:00,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:31:00,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:31:00,811 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:31:00,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:31:00,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:31:00,813 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:31:00,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:31:00,813 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:31:00,814 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:31:00,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:31:00,814 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:31:00,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:31:00,815 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:31:00,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:31:00,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:31:00,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:31:00,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:31:00,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:31:00,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:31:00,817 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:31:00,817 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:31:00,817 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:31:00,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:31:00,818 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:31:00,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:31:00,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:31:00,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:31:00,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:31:00,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:31:00,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:31:00,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:31:00,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:31:00,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:31:00,820 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:31:00,821 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:31:00,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:31:00,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:31:00,821 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_095f5971-20d2-4b27-8fab-67c9ebb46e64/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 -> ed4d18349810257ce078dfe4f08b9b953ed4516f [2019-11-26 02:31:01,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:31:01,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:31:01,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:31:01,104 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:31:01,105 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:31:01,105 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-11-26 02:31:01,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/c2c24e8b9/e0745412453e44b1a407afadb37ec69c/FLAGe064aeacb [2019-11-26 02:31:01,648 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:31:01,654 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/sv-benchmarks/c/list-simple/dll2c_update_all.i [2019-11-26 02:31:01,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/c2c24e8b9/e0745412453e44b1a407afadb37ec69c/FLAGe064aeacb [2019-11-26 02:31:02,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/data/c2c24e8b9/e0745412453e44b1a407afadb37ec69c [2019-11-26 02:31:02,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:31:02,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:31:02,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:31:02,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:31:02,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:31:02,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125f6b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02, skipping insertion in model container [2019-11-26 02:31:02,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:31:02,091 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:31:02,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:31:02,488 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:31:02,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:31:02,601 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:31:02,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02 WrapperNode [2019-11-26 02:31:02,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:31:02,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:31:02,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:31:02,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:31:02,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:31:02,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:31:02,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:31:02,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:31:02,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... [2019-11-26 02:31:02,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:31:02,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:31:02,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:31:02,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:31:02,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/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 [2019-11-26 02:31:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:31:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:31:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:31:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:31:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:31:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:31:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:31:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:31:03,251 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:31:03,252 INFO L284 CfgBuilder]: Removed 26 assume(true) statements. [2019-11-26 02:31:03,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:31:03 BoogieIcfgContainer [2019-11-26 02:31:03,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:31:03,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:31:03,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:31:03,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:31:03,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:31:02" (1/3) ... [2019-11-26 02:31:03,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6809b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:31:03, skipping insertion in model container [2019-11-26 02:31:03,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:31:02" (2/3) ... [2019-11-26 02:31:03,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6809b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:31:03, skipping insertion in model container [2019-11-26 02:31:03,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:31:03" (3/3) ... [2019-11-26 02:31:03,258 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2019-11-26 02:31:03,265 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:31:03,270 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:31:03,278 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:31:03,296 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:31:03,297 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:31:03,297 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:31:03,297 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:31:03,297 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:31:03,297 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:31:03,297 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:31:03,297 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:31:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-26 02:31:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:31:03,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:03,316 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:31:03,316 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:31:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash 364821611, now seen corresponding path program 1 times [2019-11-26 02:31:03,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:03,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [619306163] [2019-11-26 02:31:03,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:03,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:31:03,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:03,520 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:03,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619306163] [2019-11-26 02:31:03,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:31:03,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-26 02:31:03,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136745539] [2019-11-26 02:31:03,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:31:03,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:03,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:31:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:03,564 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2019-11-26 02:31:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:03,606 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2019-11-26 02:31:03,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:31:03,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-26 02:31:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:03,617 INFO L225 Difference]: With dead ends: 66 [2019-11-26 02:31:03,618 INFO L226 Difference]: Without dead ends: 32 [2019-11-26 02:31:03,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:31:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-26 02:31:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-11-26 02:31:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-26 02:31:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-26 02:31:03,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-11-26 02:31:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:03,666 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-26 02:31:03,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:31:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-26 02:31:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:31:03,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:03,668 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:31:03,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:03,878 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:31:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash -155461857, now seen corresponding path program 1 times [2019-11-26 02:31:03,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:03,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [558710816] [2019-11-26 02:31:03,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:04,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:31:04,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:31:04,087 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:31:04,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558710816] [2019-11-26 02:31:04,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:31:04,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-26 02:31:04,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991461907] [2019-11-26 02:31:04,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:31:04,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:04,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:31:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:31:04,114 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2019-11-26 02:31:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:04,212 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-11-26 02:31:04,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:31:04,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-26 02:31:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:04,215 INFO L225 Difference]: With dead ends: 50 [2019-11-26 02:31:04,215 INFO L226 Difference]: Without dead ends: 41 [2019-11-26 02:31:04,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:31:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-26 02:31:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-11-26 02:31:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:31:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-26 02:31:04,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 22 [2019-11-26 02:31:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:04,235 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-26 02:31:04,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:31:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-26 02:31:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 02:31:04,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:04,238 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:31:04,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:04,449 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:31:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash 194768371, now seen corresponding path program 1 times [2019-11-26 02:31:04,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:04,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1055435260] [2019-11-26 02:31:04,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:04,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:31:04,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:31:04,691 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:31:04,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1055435260] [2019-11-26 02:31:04,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713461023] [2019-11-26 02:31:04,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:31:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:04,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:31:04,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:31:04,851 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:31:04,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:31:04,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 8 [2019-11-26 02:31:04,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828797162] [2019-11-26 02:31:04,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:31:04,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:31:04,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:31:04,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:31:04,860 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-11-26 02:31:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:31:05,062 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2019-11-26 02:31:05,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:31:05,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-26 02:31:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:31:05,065 INFO L225 Difference]: With dead ends: 69 [2019-11-26 02:31:05,065 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:31:05,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:31:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:31:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2019-11-26 02:31:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-26 02:31:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-26 02:31:05,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 30 [2019-11-26 02:31:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:31:05,082 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-26 02:31:05,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:31:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-26 02:31:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-26 02:31:05,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:31:05,084 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:31:05,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:31:05,493 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:31:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:31:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash -385269850, now seen corresponding path program 1 times [2019-11-26 02:31:05,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:31:05,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [911028872] [2019-11-26 02:31:05,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_095f5971-20d2-4b27-8fab-67c9ebb46e64/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:31:05,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-26 02:31:05,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:31:05,860 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2019-11-26 02:31:05,861 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:05,874 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:05,875 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:05,875 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:31:05,952 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:05,953 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 17 [2019-11-26 02:31:05,954 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:05,972 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:05,973 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:05,973 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2019-11-26 02:31:06,057 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2019-11-26 02:31:06,058 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,086 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:06,086 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,086 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-26 02:31:06,150 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-26 02:31:06,151 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,174 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:06,174 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,175 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-26 02:31:06,293 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:06,295 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-26 02:31:06,327 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:06,327 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 76 [2019-11-26 02:31:06,328 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,384 INFO L567 ElimStorePlain]: treesize reduction 32, result has 57.3 percent of original size [2019-11-26 02:31:06,385 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,386 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:58 [2019-11-26 02:31:06,642 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_35|], 18=[|v_#memory_$Pointer$.base_36|]} [2019-11-26 02:31:06,654 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 13 treesize of output 9 [2019-11-26 02:31:06,654 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,709 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:06,721 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:06,722 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:06,724 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:06,726 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:06,727 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-26 02:31:06,740 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:06,741 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 63 [2019-11-26 02:31:06,743 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,803 INFO L567 ElimStorePlain]: treesize reduction 48, result has 57.5 percent of original size [2019-11-26 02:31:06,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:06,804 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:88, output treesize:65 [2019-11-26 02:31:06,993 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:31:06,997 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-26 02:31:07,010 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:07,011 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 36 [2019-11-26 02:31:07,011 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:07,021 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:07,021 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:07,021 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:22 [2019-11-26 02:31:07,090 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-26 02:31:07,090 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:07,124 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:07,125 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:07,126 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:18 [2019-11-26 02:31:07,284 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 24 treesize of output 12 [2019-11-26 02:31:07,285 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:31:07,290 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:07,291 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:31:07,291 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:7 [2019-11-26 02:31:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:31:07,386 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:31:08,177 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 242 treesize of output 230 [2019-11-26 02:31:08,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:08,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:31:08,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:08,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:08,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:08,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:08,185 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-26 02:31:08,442 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2019-11-26 02:31:08,443 INFO L567 ElimStorePlain]: treesize reduction 361, result has 19.2 percent of original size [2019-11-26 02:31:08,449 INFO L496 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2019-11-26 02:31:08,525 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:08,527 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 5 xjuncts. [2019-11-26 02:31:08,527 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:68, output treesize:64 [2019-11-26 02:31:09,210 INFO L343 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2019-11-26 02:31:09,210 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 55 [2019-11-26 02:31:09,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,238 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:31:09,239 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 71 [2019-11-26 02:31:09,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:31:09,258 INFO L392 ElimStorePlain]: Different costs {0=[v_arrayElimCell_18, v_arrayElimCell_17], 3=[v_arrayElimCell_19]} [2019-11-26 02:31:09,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:31:09,466 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.(DerPreprocessor.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:291) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.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.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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) [2019-11-26 02:31:09,469 INFO L168 Benchmark]: Toolchain (without parser) took 7447.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 218.6 MB). Free memory was 949.7 MB in the beginning and 1.0 GB in the end (delta: -87.6 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:09,471 INFO L168 Benchmark]: CDTParser took 0.23 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. [2019-11-26 02:31:09,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 579.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -183.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:09,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.98 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. [2019-11-26 02:31:09,474 INFO L168 Benchmark]: Boogie Preprocessor took 39.23 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. [2019-11-26 02:31:09,477 INFO L168 Benchmark]: RCFGBuilder took 558.27 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: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:09,477 INFO L168 Benchmark]: TraceAbstraction took 6214.71 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 65.8 MB). Peak memory consumption was 126.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:31:09,480 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 579.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -183.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.98 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 39.23 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. * RCFGBuilder took 558.27 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: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6214.71 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 65.8 MB). Peak memory consumption was 126.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...