./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test25-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/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 ef8f82b31b77c43c96cf1b9cfaef9c4e99ae1632 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:19:49,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:19:49,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:19:49,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:19:49,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:19:49,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:19:49,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:19:49,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:19:49,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:19:49,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:19:49,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:19:49,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:19:49,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:19:49,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:19:49,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:19:49,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:19:49,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:19:49,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:19:49,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:19:49,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:19:49,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:19:49,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:19:49,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:19:49,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:19:49,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:19:49,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:19:49,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:19:49,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:19:49,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:19:49,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:19:49,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:19:49,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:19:49,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:19:49,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:19:49,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:19:49,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:19:49,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:19:49,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:19:49,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:19:49,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:19:49,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:19:49,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 21:19:49,696 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:19:49,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:19:49,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:19:49,697 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:19:49,697 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:19:49,697 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:19:49,698 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:19:49,698 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:19:49,698 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:19:49,698 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:19:49,698 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:19:49,698 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:19:49,698 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:19:49,699 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:19:49,699 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:19:49,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:19:49,699 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:19:49,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:19:49,700 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:19:49,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:19:49,701 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:19:49,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:19:49,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:19:49,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:19:49,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:19:49,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:19:49,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:19:49,702 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/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 -> ef8f82b31b77c43c96cf1b9cfaef9c4e99ae1632 [2019-12-07 21:19:49,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:19:49,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:19:49,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:19:49,814 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:19:49,814 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:19:49,815 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test25-1.c [2019-12-07 21:19:49,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/data/102f81c66/1612597d961f4b0ab15ca5a80f1d8618/FLAG483ff902b [2019-12-07 21:19:50,266 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:19:50,266 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/sv-benchmarks/c/ldv-regression/test25-1.c [2019-12-07 21:19:50,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/data/102f81c66/1612597d961f4b0ab15ca5a80f1d8618/FLAG483ff902b [2019-12-07 21:19:50,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/data/102f81c66/1612597d961f4b0ab15ca5a80f1d8618 [2019-12-07 21:19:50,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:19:50,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:19:50,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:19:50,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:19:50,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:19:50,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d9133a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50, skipping insertion in model container [2019-12-07 21:19:50,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:19:50,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:19:50,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:19:50,452 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:19:50,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:19:50,475 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:19:50,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50 WrapperNode [2019-12-07 21:19:50,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:19:50,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:19:50,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:19:50,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:19:50,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:19:50,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:19:50,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:19:50,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:19:50,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... [2019-12-07 21:19:50,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:19:50,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:19:50,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:19:50,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:19:50,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:19:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 21:19:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 21:19:50,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:19:50,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:19:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 21:19:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 21:19:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 21:19:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 21:19:50,745 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:19:50,746 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 21:19:50,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:19:50 BoogieIcfgContainer [2019-12-07 21:19:50,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:19:50,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:19:50,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:19:50,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:19:50,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:19:50" (1/3) ... [2019-12-07 21:19:50,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c49cf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:19:50, skipping insertion in model container [2019-12-07 21:19:50,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:19:50" (2/3) ... [2019-12-07 21:19:50,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c49cf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:19:50, skipping insertion in model container [2019-12-07 21:19:50,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:19:50" (3/3) ... [2019-12-07 21:19:50,751 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-1.c [2019-12-07 21:19:50,758 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:19:50,762 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:19:50,769 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:19:50,785 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:19:50,785 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:19:50,785 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:19:50,785 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:19:50,785 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:19:50,785 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:19:50,785 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:19:50,785 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:19:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-12-07 21:19:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 21:19:50,798 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:50,798 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:19:50,798 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:19:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -747950451, now seen corresponding path program 1 times [2019-12-07 21:19:50,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:50,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356340992] [2019-12-07 21:19:50,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:50,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356340992] [2019-12-07 21:19:50,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:19:50,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:19:50,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600960390] [2019-12-07 21:19:50,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:19:50,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:50,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:19:50,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:19:50,915 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-12-07 21:19:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:19:50,934 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2019-12-07 21:19:50,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:19:50,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 21:19:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:19:50,942 INFO L225 Difference]: With dead ends: 25 [2019-12-07 21:19:50,942 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 21:19:50,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:19:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 21:19:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 21:19:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 21:19:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 21:19:50,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-12-07 21:19:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:19:50,965 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 21:19:50,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:19:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 21:19:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 21:19:50,965 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:50,965 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:19:50,966 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:19:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1048252678, now seen corresponding path program 1 times [2019-12-07 21:19:50,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:50,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159543281] [2019-12-07 21:19:50,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:51,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159543281] [2019-12-07 21:19:51,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101983274] [2019-12-07 21:19:51,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/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 [2019-12-07 21:19:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:51,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:19:51,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:19:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:51,066 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:19:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:51,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226595224] [2019-12-07 21:19:51,099 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:19:51,100 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:19:51,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:19:51,110 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:19:51,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:19:51,739 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:19:52,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:19:52,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 10 [2019-12-07 21:19:52,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134215942] [2019-12-07 21:19:52,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 21:19:52,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 21:19:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 21:19:52,175 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-12-07 21:19:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:19:52,215 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-12-07 21:19:52,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 21:19:52,215 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 21:19:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:19:52,216 INFO L225 Difference]: With dead ends: 17 [2019-12-07 21:19:52,216 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 21:19:52,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 21:19:52,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 21:19:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 21:19:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 21:19:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 21:19:52,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-12-07 21:19:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:19:52,219 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 21:19:52,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 21:19:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 21:19:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 21:19:52,220 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:52,220 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:19:52,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:19:52,421 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:19:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1920027615, now seen corresponding path program 1 times [2019-12-07 21:19:52,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:52,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438472789] [2019-12-07 21:19:52,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:19:52,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438472789] [2019-12-07 21:19:52,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866392909] [2019-12-07 21:19:52,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:19:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:52,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:19:52,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:19:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:19:52,604 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:19:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:19:52,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721453579] [2019-12-07 21:19:52,618 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:19:52,618 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:19:52,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:19:52,618 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:19:52,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:19:53,039 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:19:53,425 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:19:53,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:19:53,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2019-12-07 21:19:53,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120147993] [2019-12-07 21:19:53,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 21:19:53,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 21:19:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 21:19:53,426 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-12-07 21:19:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:19:53,439 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-12-07 21:19:53,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 21:19:53,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 21:19:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:19:53,440 INFO L225 Difference]: With dead ends: 26 [2019-12-07 21:19:53,440 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 21:19:53,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-07 21:19:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 21:19:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 21:19:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 21:19:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 21:19:53,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-12-07 21:19:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:19:53,443 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 21:19:53,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 21:19:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 21:19:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 21:19:53,443 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:53,444 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:19:53,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:19:53,645 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:19:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1780693450, now seen corresponding path program 2 times [2019-12-07 21:19:53,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:53,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694406111] [2019-12-07 21:19:53,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:19:53,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694406111] [2019-12-07 21:19:53,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471435353] [2019-12-07 21:19:53,738 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/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 [2019-12-07 21:19:53,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 21:19:53,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:19:53,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 21:19:53,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:19:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 21:19:55,836 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:19:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 21:19:55,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010546924] [2019-12-07 21:19:55,879 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:19:55,879 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:19:55,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:19:55,880 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:19:55,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:19:56,234 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:19:56,679 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:19:56,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:19:56,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2019-12-07 21:19:56,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163382253] [2019-12-07 21:19:56,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 21:19:56,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:56,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 21:19:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=318, Unknown=1, NotChecked=0, Total=380 [2019-12-07 21:19:56,681 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2019-12-07 21:20:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:20:00,039 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-12-07 21:20:00,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 21:20:00,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-12-07 21:20:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:20:00,040 INFO L225 Difference]: With dead ends: 33 [2019-12-07 21:20:00,040 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 21:20:00,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=97, Invalid=501, Unknown=2, NotChecked=0, Total=600 [2019-12-07 21:20:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 21:20:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 21:20:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 21:20:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 21:20:00,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2019-12-07 21:20:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:20:00,044 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 21:20:00,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 21:20:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 21:20:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 21:20:00,044 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:20:00,044 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:20:00,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:20:00,246 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:20:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:20:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1770213938, now seen corresponding path program 3 times [2019-12-07 21:20:00,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:20:00,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933243303] [2019-12-07 21:20:00,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:20:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:20:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 21:20:00,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933243303] [2019-12-07 21:20:00,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042928092] [2019-12-07 21:20:00,302 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:20:00,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 21:20:00,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:20:00,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 21:20:00,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:20:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 21:20:09,617 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:20:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 21:20:09,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28952487] [2019-12-07 21:20:09,721 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:20:09,721 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:20:09,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:20:09,722 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:20:09,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:20:10,043 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:20:10,839 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:20:10,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:20:10,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2019-12-07 21:20:10,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112243869] [2019-12-07 21:20:10,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 21:20:10,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:20:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 21:20:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=582, Unknown=2, NotChecked=0, Total=702 [2019-12-07 21:20:10,841 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2019-12-07 21:20:25,068 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 31 [2019-12-07 21:20:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:20:31,382 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-12-07 21:20:31,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 21:20:31,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-12-07 21:20:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:20:31,383 INFO L225 Difference]: With dead ends: 52 [2019-12-07 21:20:31,384 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 21:20:31,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=267, Invalid=1135, Unknown=4, NotChecked=0, Total=1406 [2019-12-07 21:20:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 21:20:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-07 21:20:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 21:20:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-12-07 21:20:31,388 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 22 [2019-12-07 21:20:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:20:31,389 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-12-07 21:20:31,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 21:20:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-12-07 21:20:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 21:20:31,389 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:20:31,390 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:20:31,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:20:31,591 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:20:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:20:31,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1652646025, now seen corresponding path program 4 times [2019-12-07 21:20:31,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:20:31,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178264470] [2019-12-07 21:20:31,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:20:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:20:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-12-07 21:20:31,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178264470] [2019-12-07 21:20:31,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61556353] [2019-12-07 21:20:31,660 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:20:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:20:31,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 21:20:31,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:20:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-12-07 21:20:31,705 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:20:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-12-07 21:20:31,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867373608] [2019-12-07 21:20:31,744 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-12-07 21:20:31,744 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:20:31,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:20:31,744 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:20:31,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:20:32,059 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:20:32,543 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:20:32,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:20:32,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2019-12-07 21:20:32,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883453647] [2019-12-07 21:20:32,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 21:20:32,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:20:32,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 21:20:32,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 21:20:32,544 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2019-12-07 21:20:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:20:32,567 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-12-07 21:20:32,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 21:20:32,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-12-07 21:20:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:20:32,568 INFO L225 Difference]: With dead ends: 68 [2019-12-07 21:20:32,568 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 21:20:32,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 16 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-07 21:20:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 21:20:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-07 21:20:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 21:20:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-12-07 21:20:32,573 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2019-12-07 21:20:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:20:32,573 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-12-07 21:20:32,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 21:20:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-12-07 21:20:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 21:20:32,574 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:20:32,574 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:20:32,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:20:32,775 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:20:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:20:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1840942263, now seen corresponding path program 5 times [2019-12-07 21:20:32,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:20:32,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658346489] [2019-12-07 21:20:32,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:20:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 21:20:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 21:20:33,153 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 21:20:33,153 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 21:20:33,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:20:33 BoogieIcfgContainer [2019-12-07 21:20:33,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:20:33,183 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:20:33,183 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:20:33,183 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:20:33,184 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:19:50" (3/4) ... [2019-12-07 21:20:33,185 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 21:20:33,224 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bd82443a-b52b-4f39-85f5-7b62d27c96a4/bin/utaipan/witness.graphml [2019-12-07 21:20:33,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:20:33,226 INFO L168 Benchmark]: Toolchain (without parser) took 42944.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 943.5 MB in the beginning and 859.6 MB in the end (delta: 83.9 MB). Peak memory consumption was 239.1 MB. Max. memory is 11.5 GB. [2019-12-07 21:20:33,226 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:20:33,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.78 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -160.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:20:33,226 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:20:33,226 INFO L168 Benchmark]: Boogie Preprocessor took 18.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:20:33,227 INFO L168 Benchmark]: RCFGBuilder took 226.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 21:20:33,227 INFO L168 Benchmark]: TraceAbstraction took 42435.49 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 46.1 MB). Free memory was 1.1 GB in the beginning and 868.8 MB in the end (delta: 207.9 MB). Peak memory consumption was 254.1 MB. Max. memory is 11.5 GB. [2019-12-07 21:20:33,227 INFO L168 Benchmark]: Witness Printer took 41.69 ms. Allocated memory is still 1.2 GB. Free memory was 868.8 MB in the beginning and 859.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 11.5 GB. [2019-12-07 21:20:33,228 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 193.78 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -160.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 226.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 42435.49 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 46.1 MB). Free memory was 1.1 GB in the beginning and 868.8 MB in the end (delta: 207.9 MB). Peak memory consumption was 254.1 MB. Max. memory is 11.5 GB. * Witness Printer took 41.69 ms. Allocated memory is still 1.2 GB. Free memory was 868.8 MB in the beginning and 859.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] struct cont cont; [L20] struct dummy array[10]; [L21] int i, *pa; [L22] i = __VERIFIER_nondet_int() [L24] int j = 0; [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND TRUE j < 10 [L25] array[j].a = __VERIFIER_nondet_int() [L26] array[j].b = __VERIFIER_nondet_int() [L24] j++ [L24] COND FALSE !(j < 10) [L29] COND TRUE i >= 0 && i < 9 [L30] cont.array = &array[i] [L31] EXPR cont.array [L31] pa = &cont.array[0].b [L32] EXPR cont.array [L32] EXPR cont.array[0].b [L32] COND TRUE cont.array[0].b > 0 [L33] EXPR array[i].b [L33] i = array[i].b - 10 [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND TRUE i < *pa [L35] ++i [L34] EXPR \read(*pa) [L34] COND FALSE !(i < *pa) [L14] EXPR pc->array [L14] EXPR pc->array[1].b [L14] return pc->array[1].b == i; [L37] COND TRUE !check(&cont, i) [L45] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: UNSAFE, OverallTime: 42.3s, OverallIterations: 7, TraceHistogramMax: 11, AutomataDifference: 24.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 25 SDslu, 144 SDs, 0 SdLazy, 210 SolverSat, 20 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 317 GetRequests, 194 SyntacticMatches, 28 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 28.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 235 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 274 ConstructedInterpolants, 12 QuantifiedInterpolants, 18027 SizeOfPredicates, 41 NumberOfNonLiveVariables, 499 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 408/546 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 640, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 7, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 515, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 510, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 221, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 23, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 68, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 7, DOMAIN_ISBOTTOM_TIME[ms]: 11, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 470, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 470, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 26, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...