./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_1-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 dc18d6791d5a51f5782a845009bfa8a1645f2712 ............................................................................................................................................................................................................................................................................................................................ 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/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_1-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 dc18d6791d5a51f5782a845009bfa8a1645f2712 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:26:08,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:08,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:08,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:08,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:08,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:08,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:08,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:08,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:08,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:08,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:08,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:08,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:08,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:08,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:08,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:08,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:08,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:08,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:08,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:08,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:08,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:08,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:08,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:08,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:08,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:08,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:08,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:08,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:08,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:08,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:08,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:08,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:08,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:08,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:08,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:08,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:08,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:08,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:08,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:08,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:08,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:26:08,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:08,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:08,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:08,088 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:08,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:08,089 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:08,089 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:26:08,089 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:08,089 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:08,089 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:26:08,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:26:08,090 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:08,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:08,091 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:08,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:26:08,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:08,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:08,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:08,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:08,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:08,092 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:08,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:08,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:08,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:08,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:08,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:08,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:08,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:08,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:08,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:08,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:08,095 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:26:08,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:26:08,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:08,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:08,096 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/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 -> dc18d6791d5a51f5782a845009bfa8a1645f2712 [2019-10-22 11:26:08,122 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:08,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:08,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:08,144 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:08,144 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:08,146 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/array_1-2.c [2019-10-22 11:26:08,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/98a8a67f0/4582b442412a484d867fc441d151d1a4/FLAG749ec44a3 [2019-10-22 11:26:08,569 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:08,569 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/sv-benchmarks/c/loop-acceleration/array_1-2.c [2019-10-22 11:26:08,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/98a8a67f0/4582b442412a484d867fc441d151d1a4/FLAG749ec44a3 [2019-10-22 11:26:08,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/98a8a67f0/4582b442412a484d867fc441d151d1a4 [2019-10-22 11:26:08,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:08,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:08,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:08,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:08,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:08,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2ced30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08, skipping insertion in model container [2019-10-22 11:26:08,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,605 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:08,619 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:08,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:08,817 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:08,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:08,852 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:08,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08 WrapperNode [2019-10-22 11:26:08,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:08,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:08,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:08,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:08,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:08,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:08,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:08,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:08,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... [2019-10-22 11:26:08,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:08,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:08,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:08,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:08,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 [2019-10-22 11:26:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:26:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:08,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:26:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:26:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:26:09,200 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:09,201 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:26:09,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:09 BoogieIcfgContainer [2019-10-22 11:26:09,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:09,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:09,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:09,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:09,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:08" (1/3) ... [2019-10-22 11:26:09,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e15eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:09, skipping insertion in model container [2019-10-22 11:26:09,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:08" (2/3) ... [2019-10-22 11:26:09,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e15eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:09, skipping insertion in model container [2019-10-22 11:26:09,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:09" (3/3) ... [2019-10-22 11:26:09,224 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2019-10-22 11:26:09,246 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:09,266 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:09,277 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:09,329 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:09,341 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:09,341 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:09,342 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:09,342 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:09,342 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:09,342 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:09,342 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:26:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:26:09,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:09,383 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:26:09,385 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:09,392 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2019-10-22 11:26:09,401 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:09,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613112944] [2019-10-22 11:26:09,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:09,404 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:09,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:09,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613112944] [2019-10-22 11:26:09,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:09,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:26:09,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035316367] [2019-10-22 11:26:09,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:26:09,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:26:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:09,594 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-10-22 11:26:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:09,625 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-10-22 11:26:09,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:26:09,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-10-22 11:26:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:09,639 INFO L225 Difference]: With dead ends: 22 [2019-10-22 11:26:09,640 INFO L226 Difference]: Without dead ends: 10 [2019-10-22 11:26:09,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-10-22 11:26:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-10-22 11:26:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:26:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-10-22 11:26:09,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-10-22 11:26:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:09,687 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-10-22 11:26:09,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:26:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-10-22 11:26:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:26:09,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:09,688 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:09,688 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2019-10-22 11:26:09,689 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:09,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361169041] [2019-10-22 11:26:09,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:09,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:09,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:09,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361169041] [2019-10-22 11:26:09,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775869585] [2019-10-22 11:26:09,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 [2019-10-22 11:26:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:09,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:26:09,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:09,789 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:09,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [742165244] [2019-10-22 11:26:09,828 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 9 [2019-10-22 11:26:09,862 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:26:09,862 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:26:10,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:10,142 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) 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.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) 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:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) 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) [2019-10-22 11:26:10,149 INFO L168 Benchmark]: Toolchain (without parser) took 1558.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -143.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:10,150 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 958.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:10,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:10,151 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.79 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. [2019-10-22 11:26:10,152 INFO L168 Benchmark]: Boogie Preprocessor took 22.39 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. [2019-10-22 11:26:10,152 INFO L168 Benchmark]: RCFGBuilder took 291.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:10,153 INFO L168 Benchmark]: TraceAbstraction took 943.21 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: 42.1 MB). Peak memory consumption was 42.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:10,156 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 958.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.79 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 22.39 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 291.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 943.21 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: 42.1 MB). Peak memory consumption was 42.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:26:12,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:12,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:12,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:12,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:12,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:12,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:12,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:12,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:12,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:12,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:12,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:12,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:12,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:12,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:12,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:12,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:12,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:12,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:12,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:12,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:12,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:12,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:12,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:12,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:12,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:12,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:12,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:12,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:12,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:12,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:12,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:12,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:12,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:12,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:12,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:12,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:12,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:12,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:12,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:12,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:12,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:26:12,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:12,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:12,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:12,407 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:12,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:12,407 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:12,407 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:12,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:12,408 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:12,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:12,408 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:12,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:12,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:12,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:12,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:12,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:12,409 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:26:12,410 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:26:12,410 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:12,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:12,410 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:26:12,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:12,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:12,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:12,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:12,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:12,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:12,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:12,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:12,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:12,412 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:26:12,412 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:26:12,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:12,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:12,412 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/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 -> dc18d6791d5a51f5782a845009bfa8a1645f2712 [2019-10-22 11:26:12,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:12,450 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:12,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:12,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:12,454 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:12,455 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/array_1-2.c [2019-10-22 11:26:12,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/0b74044b1/20dd350f98c04c7d975628348958241e/FLAGce9c682c1 [2019-10-22 11:26:12,908 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:12,911 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/sv-benchmarks/c/loop-acceleration/array_1-2.c [2019-10-22 11:26:12,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/0b74044b1/20dd350f98c04c7d975628348958241e/FLAGce9c682c1 [2019-10-22 11:26:12,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/data/0b74044b1/20dd350f98c04c7d975628348958241e [2019-10-22 11:26:12,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:12,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:12,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:12,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:12,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:12,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:12" (1/1) ... [2019-10-22 11:26:12,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3670d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:12, skipping insertion in model container [2019-10-22 11:26:12,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:12" (1/1) ... [2019-10-22 11:26:12,960 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:12,977 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:13,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:13,169 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:13,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:13,212 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:13,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13 WrapperNode [2019-10-22 11:26:13,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:13,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:13,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:13,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:13,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:13,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:13,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:13,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:13,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... [2019-10-22 11:26:13,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:13,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:13,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:13,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:13,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 [2019-10-22 11:26:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 11:26:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:26:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:26:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:26:13,560 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:13,560 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 11:26:13,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:13 BoogieIcfgContainer [2019-10-22 11:26:13,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:13,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:13,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:13,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:13,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:12" (1/3) ... [2019-10-22 11:26:13,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f02f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:13, skipping insertion in model container [2019-10-22 11:26:13,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:13" (2/3) ... [2019-10-22 11:26:13,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f02f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:13, skipping insertion in model container [2019-10-22 11:26:13,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:13" (3/3) ... [2019-10-22 11:26:13,570 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2019-10-22 11:26:13,584 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:13,591 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:13,604 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:13,629 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:13,629 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:13,629 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:13,629 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:13,629 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:13,630 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:13,630 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:13,630 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 11:26:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:26:13,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:13,651 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:26:13,653 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2019-10-22 11:26:13,669 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:13,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2037206257] [2019-10-22 11:26:13,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 [2019-10-22 11:26:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:13,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 11:26:13,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:13,821 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:13,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037206257] [2019-10-22 11:26:13,832 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:13,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:26:13,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122441896] [2019-10-22 11:26:13,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:26:13,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:26:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:13,854 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-10-22 11:26:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:13,899 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2019-10-22 11:26:13,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:26:13,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-10-22 11:26:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:13,912 INFO L225 Difference]: With dead ends: 23 [2019-10-22 11:26:13,912 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 11:26:13,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 11:26:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-10-22 11:26:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 11:26:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-10-22 11:26:13,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2019-10-22 11:26:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:13,952 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-10-22 11:26:13,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:26:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-10-22 11:26:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:26:13,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:13,953 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:14,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:14,154 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 1 times [2019-10-22 11:26:14,155 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:14,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1833961941] [2019-10-22 11:26:14,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/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 [2019-10-22 11:26:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:14,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:26:14,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:14,241 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:14,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1833961941] [2019-10-22 11:26:14,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570947772] [2019-10-22 11:26:14,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:14,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:26:14,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:14,345 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:14,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:14,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5] total 8 [2019-10-22 11:26:14,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808627754] [2019-10-22 11:26:14,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:26:14,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:26:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:26:14,362 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2019-10-22 11:26:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:14,529 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-10-22 11:26:14,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:26:14,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-22 11:26:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:14,532 INFO L225 Difference]: With dead ends: 23 [2019-10-22 11:26:14,532 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:26:14,533 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:26:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:26:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 11:26:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:26:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-22 11:26:14,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2019-10-22 11:26:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:14,540 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-22 11:26:14,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:26:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-22 11:26:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:26:14,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:14,543 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:14,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:14,944 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 2 times [2019-10-22 11:26:14,945 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:14,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1640771243] [2019-10-22 11:26:14,945 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:15,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:26:15,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:15,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:26:15,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:15,129 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:15,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640771243] [2019-10-22 11:26:15,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211819726] [2019-10-22 11:26:15,347 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:15,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:26:15,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:15,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:26:15,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:15,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:15,436 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:26:15,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 16 [2019-10-22 11:26:15,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911364085] [2019-10-22 11:26:15,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 11:26:15,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 11:26:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:26:15,438 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2019-10-22 11:26:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:16,119 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-22 11:26:16,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 11:26:16,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2019-10-22 11:26:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:16,126 INFO L225 Difference]: With dead ends: 39 [2019-10-22 11:26:16,126 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 11:26:16,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2019-10-22 11:26:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 11:26:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 11:26:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 11:26:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-22 11:26:16,134 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 18 [2019-10-22 11:26:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:16,134 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-22 11:26:16,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 11:26:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-22 11:26:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:26:16,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:16,136 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:16,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:16,537 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 3 times [2019-10-22 11:26:16,538 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:16,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [868063689] [2019-10-22 11:26:16,539 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:16,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 11:26:16,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:26:16,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:26:16,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:16,649 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-22 11:26:16,650 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:26:16,664 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:26:16,664 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:26:16,665 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-10-22 11:26:16,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:26:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-22 11:26:16,819 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:16,962 INFO L375 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 18 treesize of output 16 [2019-10-22 11:26:16,978 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 32 [2019-10-22 11:26:16,979 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-10-22 11:26:16,985 INFO L567 ElimStorePlain]: treesize reduction 10, result has 33.3 percent of original size [2019-10-22 11:26:16,986 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:26:16,989 INFO L567 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2019-10-22 11:26:16,989 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:26:16,989 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:1 [2019-10-22 11:26:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-22 11:26:16,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [868063689] [2019-10-22 11:26:16,995 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:16,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-10-22 11:26:16,996 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671758578] [2019-10-22 11:26:16,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:26:16,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:26:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:26:16,998 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 11 states. [2019-10-22 11:26:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:17,444 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-22 11:26:17,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:26:17,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-10-22 11:26:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:17,445 INFO L225 Difference]: With dead ends: 35 [2019-10-22 11:26:17,445 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:26:17,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:26:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:26:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:26:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:26:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:26:17,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2019-10-22 11:26:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:17,447 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:26:17,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:26:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:26:17,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:26:17,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:17,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:26:17,832 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:26:17,836 INFO L443 ceAbstractionStarter]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2019-10-22 11:26:17,837 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 16) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~#A~0.offset| (_ bv0 32)))) (or (let ((.cse0 (bvadd ULTIMATE.start_main_~i~0 (_ bv4294967295 32)))) (and (= .cse0 (select (select |#memory_int| |ULTIMATE.start_main_~#A~0.base|) (bvadd |ULTIMATE.start_main_~#A~0.offset| (bvmul ULTIMATE.start_main_~i~0 (_ bv4 32)) (_ bv4294967292 32)))) (bvslt .cse0 (_ bv1024 32)) .cse1)) (and (= (_ bv0 32) ULTIMATE.start_main_~i~0) .cse1))) [2019-10-22 11:26:17,837 INFO L443 ceAbstractionStarter]: For program point L14-4(lines 14 16) no Hoare annotation was computed. [2019-10-22 11:26:17,837 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 19) no Hoare annotation was computed. [2019-10-22 11:26:17,837 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 11:26:17,837 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-10-22 11:26:17,843 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-22 11:26:17,849 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-22 11:26:17,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:26:17 BoogieIcfgContainer [2019-10-22 11:26:17,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:26:17,852 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:26:17,852 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:26:17,852 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:26:17,853 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:13" (3/4) ... [2019-10-22 11:26:17,857 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:26:17,869 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-10-22 11:26:17,869 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:26:17,869 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 11:26:17,903 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f57ac3b1-5554-4d66-8e4b-4199de80cdcb/bin/utaipan/witness.graphml [2019-10-22 11:26:17,903 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:26:17,905 INFO L168 Benchmark]: Toolchain (without parser) took 4964.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 952.3 MB in the beginning and 900.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 212.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,905 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:17,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.80 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -214.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,911 INFO L168 Benchmark]: Boogie Preprocessor took 22.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,912 INFO L168 Benchmark]: RCFGBuilder took 225.82 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: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,912 INFO L168 Benchmark]: TraceAbstraction took 4288.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 907.1 MB in the end (delta: 228.6 MB). Peak memory consumption was 228.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,912 INFO L168 Benchmark]: Witness Printer took 51.20 ms. Allocated memory is still 1.2 GB. Free memory was 907.1 MB in the beginning and 900.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:17,915 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 268.80 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 98.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -214.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 225.82 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: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4288.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 907.1 MB in the end (delta: 228.6 MB). Peak memory consumption was 228.6 MB. Max. memory is 11.5 GB. * Witness Printer took 51.20 ms. Allocated memory is still 1.2 GB. Free memory was 907.1 MB in the beginning and 900.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant [2019-10-22 11:26:17,920 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-10-22 11:26:17,921 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((~bvadd64(i, 4294967295bv32) == unknown-#memory_int-unknown[A][~bvadd64(A, ~bvmul32(i, 4bv32), 4294967292bv32)] && ~bvslt32(~bvadd64(i, 4294967295bv32), 1024bv32)) && A == 0bv32) || (0bv32 == i && A == 0bv32) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 4.2s, OverallIterations: 4, TraceHistogramMax: 14, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 24 SDtfs, 31 SDslu, 71 SDs, 0 SdLazy, 194 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 17 NumberOfFragments, 32 HoareAnnotationTreeSize, 2 FomulaSimplifications, 398 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 32 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 96 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 180 ConstructedInterpolants, 1 QuantifiedInterpolants, 13012 SizeOfPredicates, 15 NumberOfNonLiveVariables, 162 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 392/552 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...