./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn1f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn1f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b20794e96be04a5a2c7abfe0708768d310e0c0e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2020-12-09 06:57:30,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:57:30,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:57:30,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:57:30,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:57:30,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:57:30,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:57:30,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:57:30,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:57:30,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:57:30,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:57:30,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:57:30,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:57:30,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:57:30,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:57:30,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:57:30,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:57:30,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:57:30,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:57:30,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:57:30,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:57:30,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:57:30,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:57:30,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:57:30,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:57:30,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:57:30,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:57:30,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:57:30,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:57:30,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:57:30,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:57:30,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:57:30,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:57:30,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:57:30,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:57:30,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:57:30,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:57:30,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:57:30,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:57:30,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:57:30,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:57:30,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 06:57:30,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:57:30,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:57:30,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:57:30,743 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:57:30,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:57:30,743 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:57:30,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:57:30,744 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:57:30,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:57:30,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:57:30,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:57:30,744 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:57:30,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:57:30,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:57:30,745 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:57:30,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:57:30,746 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:57:30,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:57:30,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:57:30,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:57:30,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 06:57:30,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:57:30,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 06:57:30,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:57:30,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:57:30,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 06:57:30,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:57:30,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 06:57:30,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:57:30,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:57:30,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:57:30,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:57:30,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:57:30,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 06:57:30,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:57:30,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:57:30,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 06:57:30,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:57:30,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:57:30,749 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b20794e96be04a5a2c7abfe0708768d310e0c0e [2020-12-09 06:57:30,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:57:30,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:57:30,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:57:30,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:57:30,949 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:57:30,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/../../sv-benchmarks/c/array-fpi/eqn1f.c [2020-12-09 06:57:30,992 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/data/cdec4946e/af493fb4e05d4cacbbabd8a166e686b4/FLAG35ca271d3 [2020-12-09 06:57:31,347 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:57:31,348 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/sv-benchmarks/c/array-fpi/eqn1f.c [2020-12-09 06:57:31,353 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/data/cdec4946e/af493fb4e05d4cacbbabd8a166e686b4/FLAG35ca271d3 [2020-12-09 06:57:31,759 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/data/cdec4946e/af493fb4e05d4cacbbabd8a166e686b4 [2020-12-09 06:57:31,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:57:31,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:57:31,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:57:31,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:57:31,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:57:31,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65134719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31, skipping insertion in model container [2020-12-09 06:57:31,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:57:31,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:57:31,872 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2020-12-09 06:57:31,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:57:31,889 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:57:31,897 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2020-12-09 06:57:31,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:57:31,912 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:57:31,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31 WrapperNode [2020-12-09 06:57:31,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:57:31,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:57:31,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:57:31,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:57:31,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:57:31,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:57:31,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:57:31,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:57:31,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... [2020-12-09 06:57:31,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:57:31,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:57:31,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:57:31,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:57:31,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:57:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 06:57:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:57:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 06:57:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 06:57:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:57:32,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:57:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 06:57:32,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:57:32,306 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 06:57:32,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:57:32 BoogieIcfgContainer [2020-12-09 06:57:32,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:57:32,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:57:32,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:57:32,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:57:32,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:57:31" (1/3) ... [2020-12-09 06:57:32,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370d087a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:57:32, skipping insertion in model container [2020-12-09 06:57:32,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:57:31" (2/3) ... [2020-12-09 06:57:32,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370d087a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:57:32, skipping insertion in model container [2020-12-09 06:57:32,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:57:32" (3/3) ... [2020-12-09 06:57:32,313 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1f.c [2020-12-09 06:57:32,323 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:57:32,325 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 06:57:32,333 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 06:57:32,350 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:57:32,350 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 06:57:32,350 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:57:32,350 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:57:32,350 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:57:32,350 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:57:32,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:57:32,350 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:57:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 06:57:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 06:57:32,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:32,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:32,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:57:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1727118254, now seen corresponding path program 1 times [2020-12-09 06:57:32,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:32,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621214241] [2020-12-09 06:57:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:32,458 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 06:57:32,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114546571] [2020-12-09 06:57:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 06:57:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:32,577 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 06:57:32,578 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-12-09 06:57:32,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 06:57:32,610 INFO L625 ElimStorePlain]: treesize reduction 16, result has 64.4 percent of original size [2020-12-09 06:57:32,615 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 06:57:32,615 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:14 [2020-12-09 06:57:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:32,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:32,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621214241] [2020-12-09 06:57:32,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:32,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114546571] [2020-12-09 06:57:32,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:32,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-12-09 06:57:32,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368279020] [2020-12-09 06:57:32,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 06:57:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:32,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 06:57:32,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 06:57:32,743 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 9 states. [2020-12-09 06:57:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:32,874 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-12-09 06:57:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 06:57:32,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2020-12-09 06:57:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:32,881 INFO L225 Difference]: With dead ends: 42 [2020-12-09 06:57:32,881 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 06:57:32,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-12-09 06:57:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 06:57:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 13. [2020-12-09 06:57:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 06:57:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2020-12-09 06:57:32,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2020-12-09 06:57:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:32,904 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-12-09 06:57:32,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 06:57:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2020-12-09 06:57:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:57:32,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:32,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:33,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 06:57:33,107 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:57:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1995514306, now seen corresponding path program 1 times [2020-12-09 06:57:33,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:33,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972652325] [2020-12-09 06:57:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:33,172 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 06:57:33,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717871806] [2020-12-09 06:57:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:57:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:33,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:33,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972652325] [2020-12-09 06:57:33,317 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:33,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717871806] [2020-12-09 06:57:33,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:57:33,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 06:57:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641855672] [2020-12-09 06:57:33,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 06:57:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 06:57:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 06:57:33,320 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 5 states. [2020-12-09 06:57:33,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:33,351 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-12-09 06:57:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 06:57:33,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 06:57:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:33,352 INFO L225 Difference]: With dead ends: 25 [2020-12-09 06:57:33,352 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 06:57:33,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 06:57:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 06:57:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2020-12-09 06:57:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 06:57:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-09 06:57:33,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2020-12-09 06:57:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:33,355 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-09 06:57:33,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 06:57:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-09 06:57:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:57:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:33,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:33,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:33,557 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:57:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1660276183, now seen corresponding path program 1 times [2020-12-09 06:57:33,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:33,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730942535] [2020-12-09 06:57:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:33,614 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 06:57:33,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191944854] [2020-12-09 06:57:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:33,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 06:57:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:33,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730942535] [2020-12-09 06:57:33,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191944854] [2020-12-09 06:57:33,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692014316] [2020-12-09 06:57:33,832 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 06:57:33,832 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:33,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:33,839 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:33,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:34,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:34,545 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:34,667 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-12-09 06:57:35,078 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:35,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:57:35,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-09 06:57:35,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365033300] [2020-12-09 06:57:35,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 06:57:35,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:35,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 06:57:35,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-09 06:57:35,080 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 6 states. [2020-12-09 06:57:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:57:35,144 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-09 06:57:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 06:57:35,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-09 06:57:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:57:35,145 INFO L225 Difference]: With dead ends: 29 [2020-12-09 06:57:35,146 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 06:57:35,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-09 06:57:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 06:57:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2020-12-09 06:57:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 06:57:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 06:57:35,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2020-12-09 06:57:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:57:35,150 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 06:57:35,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 06:57:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 06:57:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 06:57:35,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:57:35,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:57:35,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:35,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:57:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:57:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -76589895, now seen corresponding path program 1 times [2020-12-09 06:57:35,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:57:35,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884393136] [2020-12-09 06:57:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:57:35,407 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 06:57:35,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145844863] [2020-12-09 06:57:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:57:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:57:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 06:57:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:57:37,631 WARN L197 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 06:57:40,698 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 68 [2020-12-09 06:57:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:57:40,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:57:45,065 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~i~0 Int)) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse0 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse1 (* ULTIMATE.start_main_~i~0 8))) (store .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1) (+ (select .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1 (- 8))) 20)))) c_ULTIMATE.start_main_~b~0.base) c_ULTIMATE.start_main_~b~0.offset) 1)) is different from false [2020-12-09 06:57:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-12-09 06:57:45,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884393136] [2020-12-09 06:57:45,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:45,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145844863] [2020-12-09 06:57:45,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010745992] [2020-12-09 06:57:45,079 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 06:57:45,079 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:57:45,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:57:45,080 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:57:45,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:57:45,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:45,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:57:45,481 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:57:46,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:57:46,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:57:46,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-09 06:57:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053036062] [2020-12-09 06:57:46,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 06:57:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:57:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 06:57:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=228, Unknown=3, NotChecked=30, Total=306 [2020-12-09 06:57:46,007 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 13 states. [2020-12-09 06:57:53,522 WARN L197 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-09 06:58:07,556 WARN L197 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-12-09 06:58:11,719 WARN L197 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-09 06:58:16,524 WARN L197 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-12-09 06:58:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:33,640 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-09 06:58:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 06:58:33,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2020-12-09 06:58:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:33,642 INFO L225 Difference]: With dead ends: 48 [2020-12-09 06:58:33,642 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 06:58:33,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=174, Invalid=876, Unknown=10, NotChecked=62, Total=1122 [2020-12-09 06:58:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 06:58:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2020-12-09 06:58:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 06:58:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2020-12-09 06:58:33,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 9 [2020-12-09 06:58:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:33,648 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-12-09 06:58:33,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 06:58:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2020-12-09 06:58:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 06:58:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:33,649 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:33,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:33,850 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:58:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1123097575, now seen corresponding path program 1 times [2020-12-09 06:58:33,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:33,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522030057] [2020-12-09 06:58:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:33,889 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 06:58:33,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514831950] [2020-12-09 06:58:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:58:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 06:58:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:58:33,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:58:33,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522030057] [2020-12-09 06:58:33,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:58:33,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514831950] [2020-12-09 06:58:33,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:58:33,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-12-09 06:58:33,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623016214] [2020-12-09 06:58:33,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 06:58:33,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:58:33,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 06:58:33,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 06:58:33,966 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 8 states. [2020-12-09 06:58:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:58:34,031 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-09 06:58:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 06:58:34,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 06:58:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:58:34,032 INFO L225 Difference]: With dead ends: 34 [2020-12-09 06:58:34,032 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 06:58:34,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 06:58:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 06:58:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-09 06:58:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 06:58:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-09 06:58:34,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2020-12-09 06:58:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:58:34,036 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-09 06:58:34,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 06:58:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-09 06:58:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 06:58:34,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:58:34,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:58:34,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-09 06:58:34,239 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:58:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:58:34,240 INFO L82 PathProgramCache]: Analyzing trace with hash -807142578, now seen corresponding path program 2 times [2020-12-09 06:58:34,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:58:34,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356673538] [2020-12-09 06:58:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:58:34,276 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 06:58:34,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913804076] [2020-12-09 06:58:34,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 06:58:34,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 06:58:34,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 06:58:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 06:58:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:58:34,634 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-09 06:58:34,789 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-12-09 06:58:35,276 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-12-09 06:58:36,093 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 88 [2020-12-09 06:58:37,104 WARN L197 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-12-09 06:58:42,916 WARN L197 SmtUtils]: Spent 3.74 s on a formula simplification that was a NOOP. DAG size: 130 [2020-12-09 06:58:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:58:42,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 06:58:44,813 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~i~0_93 Int)) (or (< v_ULTIMATE.start_main_~i~0_93 (+ c_ULTIMATE.start_main_~i~0 1)) (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse3 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse2 (+ .cse3 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse3 (- 8))) (select .cse2 (+ .cse3 c_ULTIMATE.start_main_~b~0.offset (- 8))))))) (.cse1 (* v_ULTIMATE.start_main_~i~0_93 8))) (store .cse0 (+ .cse1 c_ULTIMATE.start_main_~b~0.offset) (+ (select .cse0 (+ .cse1 c_ULTIMATE.start_main_~b~0.offset (- 8))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base .cse0) c_ULTIMATE.start_main_~a~0.base) (+ .cse1 c_ULTIMATE.start_main_~a~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1))) is different from false [2020-12-09 06:59:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-09 06:59:20,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356673538] [2020-12-09 06:59:20,186 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:59:20,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913804076] [2020-12-09 06:59:20,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872659293] [2020-12-09 06:59:20,187 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 06:59:20,187 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 06:59:20,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 06:59:20,188 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 06:59:20,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 06:59:20,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 06:59:20,740 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 06:59:20,890 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-09 06:59:21,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 06:59:21,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 06:59:21,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-12-09 06:59:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635964447] [2020-12-09 06:59:21,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 06:59:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 06:59:21,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 06:59:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=341, Unknown=11, NotChecked=38, Total=462 [2020-12-09 06:59:21,532 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 17 states. [2020-12-09 06:59:29,662 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base) c_ULTIMATE.start_main_~b~0.offset) 1)) (.cse1 (not (= c_ULTIMATE.start_main_~b~0.base c_ULTIMATE.start_main_~a~0.base)))) (and .cse0 .cse1 (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (let ((.cse2 (<= 1 c_ULTIMATE.start_main_~i~0)) (.cse3 (select .cse4 (+ c_ULTIMATE.start_main_~a~0.offset (- 8)))) (.cse7 (select .cse4 c_ULTIMATE.start_main_~a~0.offset))) (or (and .cse0 .cse1 .cse2 (= .cse3 (+ (select .cse4 (+ c_ULTIMATE.start_main_~a~0.offset (- 16))) 20))) (and .cse0 (exists ((v_prenex_4 Int)) (let ((.cse5 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse6 (* v_prenex_4 8))) (= (+ (select .cse5 (+ .cse6 c_ULTIMATE.start_main_~a~0.offset (- 8))) 20) (select .cse5 (+ .cse6 c_ULTIMATE.start_main_~a~0.offset))))) .cse1 (= 2 .cse7) .cse2) (and .cse0 .cse1 .cse2 (= (+ .cse3 20) .cse7))))) (exists ((v_ULTIMATE.start_main_~i~0_87 Int)) (let ((.cse8 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (and (let ((.cse9 (* v_ULTIMATE.start_main_~i~0_87 8))) (= (+ (select .cse8 (+ c_ULTIMATE.start_main_~a~0.offset .cse9 (- 8))) 20) (select .cse8 (+ c_ULTIMATE.start_main_~a~0.offset .cse9)))) (or (= (* 8 v_ULTIMATE.start_main_~i~0_87) 0) (= 2 (select .cse8 c_ULTIMATE.start_main_~a~0.offset)))))) (forall ((v_ULTIMATE.start_main_~i~0_93 Int)) (or (< v_ULTIMATE.start_main_~i~0_93 (+ c_ULTIMATE.start_main_~i~0 1)) (= (select (let ((.cse10 (let ((.cse12 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse13 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse12 (+ .cse13 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse13 (- 8))) (select .cse12 (+ .cse13 c_ULTIMATE.start_main_~b~0.offset (- 8))))))) (.cse11 (* v_ULTIMATE.start_main_~i~0_93 8))) (store .cse10 (+ .cse11 c_ULTIMATE.start_main_~b~0.offset) (+ (select .cse10 (+ .cse11 c_ULTIMATE.start_main_~b~0.offset (- 8))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base .cse10) c_ULTIMATE.start_main_~a~0.base) (+ .cse11 c_ULTIMATE.start_main_~a~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1))))) is different from false [2020-12-09 06:59:33,709 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (let ((.cse0 (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base) c_ULTIMATE.start_main_~b~0.offset) 1)) (.cse1 (not (= c_ULTIMATE.start_main_~b~0.base c_ULTIMATE.start_main_~a~0.base))) (.cse2 (<= 1 c_ULTIMATE.start_main_~i~0)) (.cse3 (select .cse4 (+ c_ULTIMATE.start_main_~a~0.offset (- 8)))) (.cse7 (select .cse4 c_ULTIMATE.start_main_~a~0.offset))) (or (and .cse0 .cse1 .cse2 (= .cse3 (+ (select .cse4 (+ c_ULTIMATE.start_main_~a~0.offset (- 16))) 20))) (and .cse0 (exists ((v_prenex_4 Int)) (let ((.cse5 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse6 (* v_prenex_4 8))) (= (+ (select .cse5 (+ .cse6 c_ULTIMATE.start_main_~a~0.offset (- 8))) 20) (select .cse5 (+ .cse6 c_ULTIMATE.start_main_~a~0.offset))))) .cse1 (= 2 .cse7) .cse2) (and .cse0 .cse1 .cse2 (= (+ .cse3 20) .cse7))))) (forall ((v_ULTIMATE.start_main_~i~0_93 Int)) (or (< v_ULTIMATE.start_main_~i~0_93 (+ c_ULTIMATE.start_main_~i~0 1)) (= (select (let ((.cse8 (let ((.cse10 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse11 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse10 (+ .cse11 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse11 (- 8))) (select .cse10 (+ .cse11 c_ULTIMATE.start_main_~b~0.offset (- 8))))))) (.cse9 (* v_ULTIMATE.start_main_~i~0_93 8))) (store .cse8 (+ .cse9 c_ULTIMATE.start_main_~b~0.offset) (+ (select .cse8 (+ .cse9 c_ULTIMATE.start_main_~b~0.offset (- 8))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base .cse8) c_ULTIMATE.start_main_~a~0.base) (+ .cse9 c_ULTIMATE.start_main_~a~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1)))) is different from false [2020-12-09 06:59:37,044 WARN L197 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 159 DAG size of output: 159 [2020-12-09 06:59:41,053 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ULTIMATE.start_main_~i~0_97 Int) (ULTIMATE.start_main_~i~0 Int)) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse0 (let ((.cse2 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse3 (* ULTIMATE.start_main_~i~0 8))) (store .cse2 (+ c_ULTIMATE.start_main_~a~0.offset .cse3) (+ (select .cse2 (+ c_ULTIMATE.start_main_~a~0.offset .cse3 (- 8))) 20)))) (.cse1 (* v_ULTIMATE.start_main_~i~0_97 8))) (store .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1) (+ (select .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1 (- 8))) 20)))) c_ULTIMATE.start_main_~b~0.base) c_ULTIMATE.start_main_~b~0.offset) 1)) (forall ((v_ULTIMATE.start_main_~i~0_93 Int)) (or (< v_ULTIMATE.start_main_~i~0_93 (+ c_ULTIMATE.start_main_~i~0 1)) (= (select (let ((.cse4 (let ((.cse6 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse7 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse6 (+ .cse7 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse7 (- 8))) (select .cse6 (+ .cse7 c_ULTIMATE.start_main_~b~0.offset (- 8))))))) (.cse5 (* v_ULTIMATE.start_main_~i~0_93 8))) (store .cse4 (+ .cse5 c_ULTIMATE.start_main_~b~0.offset) (+ (select .cse4 (+ .cse5 c_ULTIMATE.start_main_~b~0.offset (- 8))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base .cse4) c_ULTIMATE.start_main_~a~0.base) (+ .cse5 c_ULTIMATE.start_main_~a~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1)))) is different from false [2020-12-09 06:59:49,274 WARN L197 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 153 DAG size of output: 153 [2020-12-09 06:59:53,347 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~i~0 Int)) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse0 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse1 (* ULTIMATE.start_main_~i~0 8))) (store .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1) (+ (select .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1 (- 8))) 20)))) c_ULTIMATE.start_main_~b~0.base) c_ULTIMATE.start_main_~b~0.offset) 1)) (forall ((v_ULTIMATE.start_main_~i~0_93 Int)) (or (< v_ULTIMATE.start_main_~i~0_93 (+ c_ULTIMATE.start_main_~i~0 1)) (= (select (let ((.cse2 (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse5 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse4 (+ .cse5 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse5 (- 8))) (select .cse4 (+ .cse5 c_ULTIMATE.start_main_~b~0.offset (- 8))))))) (.cse3 (* v_ULTIMATE.start_main_~i~0_93 8))) (store .cse2 (+ .cse3 c_ULTIMATE.start_main_~b~0.offset) (+ (select .cse2 (+ .cse3 c_ULTIMATE.start_main_~b~0.offset (- 8))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base .cse2) c_ULTIMATE.start_main_~a~0.base) (+ .cse3 c_ULTIMATE.start_main_~a~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1))) (= (select (let ((.cse6 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse7 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse6 (+ .cse7 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse7 (- 8))) (select .cse6 (+ .cse7 c_ULTIMATE.start_main_~b~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1)) is different from false [2020-12-09 07:00:03,681 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 155 DAG size of output: 155 [2020-12-09 07:00:09,778 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base))) (and (= (select .cse0 c_ULTIMATE.start_main_~b~0.offset) 1) (forall ((v_ULTIMATE.start_main_~i~0_93 Int)) (or (< v_ULTIMATE.start_main_~i~0_93 (+ c_ULTIMATE.start_main_~i~0 1)) (= (select (let ((.cse1 (let ((.cse3 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse4 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse3 (+ .cse4 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse4 (- 8))) (select .cse3 (+ .cse4 c_ULTIMATE.start_main_~b~0.offset (- 8))))))) (.cse2 (* v_ULTIMATE.start_main_~i~0_93 8))) (store .cse1 (+ .cse2 c_ULTIMATE.start_main_~b~0.offset) (+ (select .cse1 (+ .cse2 c_ULTIMATE.start_main_~b~0.offset (- 8))) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~b~0.base .cse1) c_ULTIMATE.start_main_~a~0.base) (+ .cse2 c_ULTIMATE.start_main_~a~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1))) (= (select (let ((.cse5 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse0 (+ .cse5 c_ULTIMATE.start_main_~b~0.offset) (+ (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset .cse5 (- 8))) (select .cse0 (+ .cse5 c_ULTIMATE.start_main_~b~0.offset (- 8)))))) c_ULTIMATE.start_main_~b~0.offset) 1))) is different from false [2020-12-09 07:00:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:00:17,673 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2020-12-09 07:00:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-09 07:00:17,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 11 [2020-12-09 07:00:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:00:17,674 INFO L225 Difference]: With dead ends: 60 [2020-12-09 07:00:17,674 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 07:00:17,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=231, Invalid=1032, Unknown=21, NotChecked=438, Total=1722 [2020-12-09 07:00:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 07:00:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 25. [2020-12-09 07:00:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 07:00:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2020-12-09 07:00:17,680 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 11 [2020-12-09 07:00:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:00:17,680 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2020-12-09 07:00:17,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 07:00:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-12-09 07:00:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:00:17,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:00:17,681 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:00:17,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:17,882 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:00:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:00:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1685377497, now seen corresponding path program 3 times [2020-12-09 07:00:17,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:00:17,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168732291] [2020-12-09 07:00:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:00:17,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:00:17,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812114562] [2020-12-09 07:00:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:17,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 07:00:17,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:00:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 07:00:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:00:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:00:17,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:00:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:00:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168732291] [2020-12-09 07:00:18,007 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:00:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812114562] [2020-12-09 07:00:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43415428] [2020-12-09 07:00:18,008 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 07:00:18,008 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:00:18,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:00:18,009 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:00:18,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:00:18,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:00:18,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:00:18,395 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:00:18,513 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-09 07:00:18,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:00:18,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:00:18,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-09 07:00:18,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96433830] [2020-12-09 07:00:18,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 07:00:18,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:00:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 07:00:18,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-09 07:00:18,934 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand 9 states. [2020-12-09 07:00:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:00:19,034 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-09 07:00:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 07:00:19,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-09 07:00:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:00:19,035 INFO L225 Difference]: With dead ends: 53 [2020-12-09 07:00:19,035 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 07:00:19,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-12-09 07:00:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 07:00:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 25. [2020-12-09 07:00:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 07:00:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-12-09 07:00:19,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2020-12-09 07:00:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:00:19,040 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-12-09 07:00:19,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 07:00:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-12-09 07:00:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:00:19,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:00:19,041 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:00:19,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:19,242 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:00:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:00:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1056724178, now seen corresponding path program 1 times [2020-12-09 07:00:19,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:00:19,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500244589] [2020-12-09 07:00:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:00:19,262 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:00:19,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917319157] [2020-12-09 07:00:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:00:19,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 07:00:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:00:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:00:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:00:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:00:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500244589] [2020-12-09 07:00:19,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:00:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917319157] [2020-12-09 07:00:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405815543] [2020-12-09 07:00:19,779 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:00:19,779 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:00:19,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:00:19,780 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:00:19,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:00:19,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:00:20,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:00:20,128 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:00:20,320 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-09 07:00:20,472 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 07:00:20,945 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-12-09 07:00:21,145 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-09 07:00:21,146 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:00:21,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:00:21,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-09 07:00:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829316511] [2020-12-09 07:00:21,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 07:00:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:00:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 07:00:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-09 07:00:21,147 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 16 states. [2020-12-09 07:00:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:00:21,919 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-12-09 07:00:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 07:00:21,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-12-09 07:00:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:00:21,920 INFO L225 Difference]: With dead ends: 35 [2020-12-09 07:00:21,920 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 07:00:21,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2020-12-09 07:00:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 07:00:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-09 07:00:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 07:00:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 07:00:21,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-12-09 07:00:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:00:21,927 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 07:00:21,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 07:00:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 07:00:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 07:00:21,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:00:21,928 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:00:22,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-09 07:00:22,129 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:00:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:00:22,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1245496473, now seen corresponding path program 2 times [2020-12-09 07:00:22,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:00:22,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197085148] [2020-12-09 07:00:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:00:22,141 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:00:22,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93425512] [2020-12-09 07:00:22,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:22,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 07:00:22,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:00:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 07:00:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:00:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:00:22,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:00:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:00:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197085148] [2020-12-09 07:00:22,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:00:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93425512] [2020-12-09 07:00:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64572593] [2020-12-09 07:00:22,256 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:00:22,256 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:00:22,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:00:22,257 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:00:22,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:00:22,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:00:22,772 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:00:22,939 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-12-09 07:00:23,063 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 07:00:23,192 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 07:00:23,320 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 07:00:23,496 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-12-09 07:00:23,667 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-09 07:00:23,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:00:23,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 07:00:23,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-09 07:00:23,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779826850] [2020-12-09 07:00:23,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 07:00:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:00:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 07:00:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-09 07:00:23,669 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 11 states. [2020-12-09 07:00:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:00:23,785 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-09 07:00:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:00:23,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-09 07:00:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:00:23,786 INFO L225 Difference]: With dead ends: 39 [2020-12-09 07:00:23,786 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 07:00:23,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-12-09 07:00:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 07:00:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-09 07:00:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 07:00:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-09 07:00:23,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-12-09 07:00:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:00:23,790 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-09 07:00:23,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 07:00:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-09 07:00:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 07:00:23,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:00:23,791 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 07:00:23,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:23,993 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:00:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:00:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 203253614, now seen corresponding path program 3 times [2020-12-09 07:00:23,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:00:23,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779175355] [2020-12-09 07:00:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:00:24,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 07:00:24,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000919032] [2020-12-09 07:00:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:24,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 07:00:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-09 07:00:24,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:00:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:00:24,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:00:24,122 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:00:24,122 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:00:24,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:00:24,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:00:24 BoogieIcfgContainer [2020-12-09 07:00:24,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:00:24,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:00:24,382 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:00:24,382 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:00:24,382 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:57:32" (3/4) ... [2020-12-09 07:00:24,383 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:00:24,411 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1c20ba9b-dce2-4a34-b3d0-9c22ee816814/bin/utaipan/witness.graphml [2020-12-09 07:00:24,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:00:24,412 INFO L168 Benchmark]: Toolchain (without parser) took 172649.76 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 80.8 MB in the beginning and 69.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:00:24,412 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 69.2 MB. Free memory was 44.9 MB in the beginning and 44.8 MB in the end (delta: 86.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:00:24,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.26 ms. Allocated memory is still 102.8 MB. Free memory was 80.4 MB in the beginning and 70.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:00:24,412 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.54 ms. Allocated memory is still 102.8 MB. Free memory was 70.5 MB in the beginning and 68.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:00:24,413 INFO L168 Benchmark]: Boogie Preprocessor took 17.04 ms. Allocated memory is still 102.8 MB. Free memory was 68.8 MB in the beginning and 67.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:00:24,413 INFO L168 Benchmark]: RCFGBuilder took 352.84 ms. Allocated memory is still 102.8 MB. Free memory was 67.6 MB in the beginning and 68.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 07:00:24,413 INFO L168 Benchmark]: TraceAbstraction took 172072.88 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 68.1 MB in the beginning and 71.9 MB in the end (delta: -3.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:00:24,413 INFO L168 Benchmark]: Witness Printer took 29.28 ms. Allocated memory is still 123.7 MB. Free memory was 71.9 MB in the beginning and 69.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:00:24,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 69.2 MB. Free memory was 44.9 MB in the beginning and 44.8 MB in the end (delta: 86.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 150.26 ms. Allocated memory is still 102.8 MB. Free memory was 80.4 MB in the beginning and 70.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.54 ms. Allocated memory is still 102.8 MB. Free memory was 70.5 MB in the beginning and 68.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.04 ms. Allocated memory is still 102.8 MB. Free memory was 68.8 MB in the beginning and 67.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 352.84 ms. Allocated memory is still 102.8 MB. Free memory was 67.6 MB in the beginning and 68.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 172072.88 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 68.1 MB in the beginning and 71.9 MB in the end (delta: -3.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * Witness Printer took 29.28 ms. Allocated memory is still 123.7 MB. Free memory was 71.9 MB in the beginning and 69.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 VAL [N=3] [L33] COND TRUE i