./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/invert_string-1.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_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/invert_string-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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 1b9a71645175fee79e6d6cd797db38ce6044ffb9 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:30:21,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:30:21,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:30:21,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:30:21,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:30:21,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:30:21,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:30:21,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:30:21,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:30:21,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:30:21,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:30:21,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:30:21,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:30:21,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:30:21,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:30:21,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:30:21,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:30:21,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:30:21,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:30:21,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:30:21,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:30:21,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:30:21,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:30:21,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:30:21,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:30:21,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:30:21,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:30:21,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:30:21,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:30:21,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:30:21,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:30:21,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:30:21,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:30:21,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:30:21,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:30:21,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:30:21,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:30:21,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:30:21,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:30:21,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:30:21,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:30:21,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:30:21,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:30:21,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:30:21,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:30:21,701 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:30:21,702 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:30:21,702 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:30:21,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:30:21,702 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:30:21,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:30:21,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:30:21,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:30:21,703 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:30:21,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:30:21,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:30:21,703 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:30:21,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:30:21,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:30:21,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:30:21,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:30:21,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:30:21,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:30:21,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:30:21,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:30:21,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:30:21,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:30:21,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:30:21,706 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:30:21,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:30:21,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:30:21,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:30:21,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:30:21,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:30:21,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:30:21,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:30:21,707 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:30:21,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:30:21,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:30:21,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:30:21,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:30:21,708 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_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b9a71645175fee79e6d6cd797db38ce6044ffb9 [2020-12-09 08:30:21,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:30:21,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:30:21,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:30:21,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:30:21,919 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:30:21,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-1.c [2020-12-09 08:30:21,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/data/fed8737a7/c959363f50e54c55b0a08265ce34fd47/FLAG2400fc7d4 [2020-12-09 08:30:22,328 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:30:22,329 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/sv-benchmarks/c/loops/invert_string-1.c [2020-12-09 08:30:22,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/data/fed8737a7/c959363f50e54c55b0a08265ce34fd47/FLAG2400fc7d4 [2020-12-09 08:30:22,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/data/fed8737a7/c959363f50e54c55b0a08265ce34fd47 [2020-12-09 08:30:22,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:30:22,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:30:22,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:30:22,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:30:22,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:30:22,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd00872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22, skipping insertion in model container [2020-12-09 08:30:22,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:30:22,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:30:22,477 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_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2020-12-09 08:30:22,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:30:22,497 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:30:22,504 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_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2020-12-09 08:30:22,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:30:22,520 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:30:22,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22 WrapperNode [2020-12-09 08:30:22,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:30:22,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:30:22,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:30:22,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:30:22,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:30:22,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:30:22,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:30:22,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:30:22,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... [2020-12-09 08:30:22,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:30:22,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:30:22,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:30:22,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:30:22,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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 08:30:22,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:30:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:30:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:30:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:30:22,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:30:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:30:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:30:22,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:30:22,921 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 08:30:22,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:30:22 BoogieIcfgContainer [2020-12-09 08:30:22,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:30:22,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:30:22,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:30:22,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:30:22,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:30:22" (1/3) ... [2020-12-09 08:30:22,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12482ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:30:22, skipping insertion in model container [2020-12-09 08:30:22,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:30:22" (2/3) ... [2020-12-09 08:30:22,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12482ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:30:22, skipping insertion in model container [2020-12-09 08:30:22,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:30:22" (3/3) ... [2020-12-09 08:30:22,931 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-12-09 08:30:22,943 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:30:22,947 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:30:22,956 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:30:22,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:30:22,977 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:30:22,977 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:30:22,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:30:22,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:30:22,977 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:30:22,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:30:22,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:30:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-09 08:30:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:30:22,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:22,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:30:22,992 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1098288631, now seen corresponding path program 1 times [2020-12-09 08:30:23,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:23,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695261193] [2020-12-09 08:30:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:23,150 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 08:30:23,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695261193] [2020-12-09 08:30:23,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:30:23,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:30:23,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860313334] [2020-12-09 08:30:23,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:30:23,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:30:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:30:23,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:30:23,169 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-12-09 08:30:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:30:23,199 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2020-12-09 08:30:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:30:23,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 08:30:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:30:23,206 INFO L225 Difference]: With dead ends: 17 [2020-12-09 08:30:23,207 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 08:30:23,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:30:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 08:30:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 08:30:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 08:30:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2020-12-09 08:30:23,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2020-12-09 08:30:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:30:23,232 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-12-09 08:30:23,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:30:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2020-12-09 08:30:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:30:23,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:23,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:30:23,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:30:23,233 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash 62424348, now seen corresponding path program 1 times [2020-12-09 08:30:23,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:23,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828979449] [2020-12-09 08:30:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:30:23,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828979449] [2020-12-09 08:30:23,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:30:23,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:30:23,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003153045] [2020-12-09 08:30:23,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:30:23,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:30:23,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:30:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:30:23,277 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2020-12-09 08:30:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:30:23,310 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-12-09 08:30:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:30:23,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:30:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:30:23,311 INFO L225 Difference]: With dead ends: 15 [2020-12-09 08:30:23,311 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 08:30:23,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:30:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 08:30:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 08:30:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 08:30:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-09 08:30:23,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-09 08:30:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:30:23,316 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-09 08:30:23,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:30:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-09 08:30:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:30:23,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:23,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:30:23,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:30:23,317 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1931368436, now seen corresponding path program 1 times [2020-12-09 08:30:23,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:23,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351109443] [2020-12-09 08:30:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:23,546 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 08:30:23,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351109443] [2020-12-09 08:30:23,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067617507] [2020-12-09 08:30:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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 08:30:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 08:30:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:30:23,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 222 [2020-12-09 08:30:23,643 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:30:23,653 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:23,656 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:30:23,656 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:17 [2020-12-09 08:30:23,676 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 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-09 08:30:23,677 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:30:23,685 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:23,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:30:23,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-09 08:30:23,721 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 08:30:23,722 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2020-12-09 08:30:23,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:30:23,734 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:23,735 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:30:23,735 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2020-12-09 08:30:23,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:30:23,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:30:23,824 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:30:23,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:30:23,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:30:23,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:30:23,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:30:23,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:30:23,867 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 08:30:23,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:30:23,936 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:23,936 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 438 treesize of output 334 [2020-12-09 08:30:23,941 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:23,942 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:23,943 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,944 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,946 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:30:23,947 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,948 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,950 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:23,953 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:23,955 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,956 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,958 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,962 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,963 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:23,964 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,965 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,969 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:23,971 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,971 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,974 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,975 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,976 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,976 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,977 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,978 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:23,979 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,980 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:23,982 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,984 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:23,985 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,986 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,987 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,989 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,990 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:23,991 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,992 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:23,994 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-09 08:30:23,995 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-09 08:30:23,996 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:23,999 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:23,999 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,000 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,001 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:30:24,001 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,002 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,004 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,005 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,006 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,007 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,009 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,010 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,011 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:24,012 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,013 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,015 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,016 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,017 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,019 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,020 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,020 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,021 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,022 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,023 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,024 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,025 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,026 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:24,027 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,028 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,029 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,030 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,031 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:24,032 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,033 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,034 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-09 08:30:24,034 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-09 08:30:24,035 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,037 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,039 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,041 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,042 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:24,043 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,044 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,045 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,046 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,047 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:24,047 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,048 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,049 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-09 08:30:24,050 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-09 08:30:24,051 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,074 INFO L348 Elim1Store]: treesize reduction 15, result has 65.1 percent of original size [2020-12-09 08:30:24,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 341 treesize of output 334 [2020-12-09 08:30:24,079 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,080 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,080 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,081 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:30:24,082 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,086 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,087 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,088 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,088 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-09 08:30:24,089 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,091 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 08:30:24,128 INFO L625 ElimStorePlain]: treesize reduction 81, result has 28.9 percent of original size [2020-12-09 08:30:24,136 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:24,137 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-09 08:30:24,138 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,139 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,140 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,190 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:24,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 438 treesize of output 334 [2020-12-09 08:30:24,193 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,194 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,194 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,195 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,196 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,202 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 6 conjuncts [2020-12-09 08:30:24,203 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,204 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,204 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,205 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,206 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,208 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,209 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,211 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,213 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,213 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,214 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,216 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,217 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,218 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,219 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,221 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,221 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,222 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,223 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,224 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,226 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,227 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,228 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-09 08:30:24,230 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,231 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,231 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,233 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,234 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,235 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,236 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,238 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,238 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-09 08:30:24,239 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,240 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,241 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,242 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,243 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,244 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,245 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,247 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,247 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,249 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,273 INFO L348 Elim1Store]: treesize reduction 15, result has 65.1 percent of original size [2020-12-09 08:30:24,273 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 341 treesize of output 334 [2020-12-09 08:30:24,277 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,278 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,279 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-09 08:30:24,280 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,280 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,282 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,283 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,284 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,285 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,285 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-12-09 08:30:24,286 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,286 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,288 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,289 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,290 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-09 08:30:24,291 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,291 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,293 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,294 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,297 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-09 08:30:24,298 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,299 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-09 08:30:24,300 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,300 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,302 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,303 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,304 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,304 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,305 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-12-09 08:30:24,306 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,306 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,307 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,308 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,310 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-09 08:30:24,310 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,311 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,312 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,313 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,314 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 08:30:24,369 INFO L625 ElimStorePlain]: treesize reduction 105, result has 23.9 percent of original size [2020-12-09 08:30:24,375 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:30:24,375 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2020-12-09 08:30:24,376 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 08:30:24,377 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:30:24,378 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-09 08:30:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:30:24,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726402716] [2020-12-09 08:30:24,432 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 08:30:24,433 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:30:24,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:30:24,441 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:30:24,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:30:24,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:30:25,203 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:30:25,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:30:25,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:30:25,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2020-12-09 08:30:25,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942291088] [2020-12-09 08:30:25,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 08:30:25,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:30:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 08:30:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-12-09 08:30:25,749 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 17 states. [2020-12-09 08:30:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:30:26,137 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-09 08:30:26,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 08:30:26,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 8 [2020-12-09 08:30:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:30:26,139 INFO L225 Difference]: With dead ends: 29 [2020-12-09 08:30:26,139 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 08:30:26,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2020-12-09 08:30:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 08:30:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2020-12-09 08:30:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 08:30:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-09 08:30:26,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2020-12-09 08:30:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:30:26,146 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-09 08:30:26,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 08:30:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-09 08:30:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:30:26,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:26,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:30:26,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 08:30:26,348 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash 685044295, now seen corresponding path program 2 times [2020-12-09 08:30:26,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:26,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247892639] [2020-12-09 08:30:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:30:26,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247892639] [2020-12-09 08:30:26,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954918013] [2020-12-09 08:30:26,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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 08:30:26,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 08:30:26,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:30:26,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:30:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:30:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:30:26,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:30:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:30:26,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103270366] [2020-12-09 08:30:26,473 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 08:30:26,473 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:30:26,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:30:26,473 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:30:26,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:30:26,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:30:27,038 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:30:27,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:30:27,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:30:27,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2020-12-09 08:30:27,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490493859] [2020-12-09 08:30:27,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:30:27,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:30:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:30:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:30:27,389 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 5 states. [2020-12-09 08:30:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:30:27,434 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-09 08:30:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 08:30:27,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 08:30:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:30:27,435 INFO L225 Difference]: With dead ends: 28 [2020-12-09 08:30:27,435 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 08:30:27,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-09 08:30:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 08:30:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-12-09 08:30:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 08:30:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-09 08:30:27,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2020-12-09 08:30:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:30:27,440 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-09 08:30:27,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:30:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-09 08:30:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:30:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:27,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 08:30:27,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-09 08:30:27,642 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash -242249687, now seen corresponding path program 3 times [2020-12-09 08:30:27,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:27,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251550887] [2020-12-09 08:30:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:30:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251550887] [2020-12-09 08:30:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173074518] [2020-12-09 08:30:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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 08:30:27,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 08:30:27,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:30:27,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 08:30:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:30:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:30:28,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:30:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 08:30:28,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564267476] [2020-12-09 08:30:28,159 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 08:30:28,159 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:30:28,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:30:28,159 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:30:28,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:30:28,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:30:28,678 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:30:29,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:30:29,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:30:29,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2020-12-09 08:30:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922881625] [2020-12-09 08:30:29,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-09 08:30:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:30:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-09 08:30:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-12-09 08:30:29,196 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 19 states. [2020-12-09 08:30:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:30:31,225 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-12-09 08:30:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-09 08:30:31,226 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2020-12-09 08:30:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:30:31,227 INFO L225 Difference]: With dead ends: 80 [2020-12-09 08:30:31,227 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 08:30:31,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=529, Invalid=2326, Unknown=7, NotChecked=0, Total=2862 [2020-12-09 08:30:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 08:30:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 21. [2020-12-09 08:30:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 08:30:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2020-12-09 08:30:31,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 10 [2020-12-09 08:30:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:30:31,238 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2020-12-09 08:30:31,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-09 08:30:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2020-12-09 08:30:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:30:31,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:31,239 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:30:31,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:30:31,441 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2020408077, now seen corresponding path program 1 times [2020-12-09 08:30:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:31,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394137709] [2020-12-09 08:30:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:30:31,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394137709] [2020-12-09 08:30:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584912931] [2020-12-09 08:30:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/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 08:30:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:30:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:30:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:30:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:30:31,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:30:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 08:30:31,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253456103] [2020-12-09 08:30:31,588 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:30:31,588 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:30:31,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:30:31,589 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:30:31,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:30:31,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:30:32,117 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:30:32,663 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-09 08:30:32,870 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:30:32,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:30:32,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2020-12-09 08:30:32,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833839375] [2020-12-09 08:30:32,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 08:30:32,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:30:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 08:30:32,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:30:32,871 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand 10 states. [2020-12-09 08:30:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:30:32,934 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-09 08:30:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 08:30:32,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-09 08:30:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:30:32,936 INFO L225 Difference]: With dead ends: 42 [2020-12-09 08:30:32,936 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 08:30:32,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-12-09 08:30:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 08:30:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2020-12-09 08:30:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 08:30:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2020-12-09 08:30:32,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 11 [2020-12-09 08:30:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:30:32,942 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2020-12-09 08:30:32,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 08:30:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2020-12-09 08:30:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 08:30:32,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:30:32,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:30:33,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:30:33,144 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:30:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:30:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1310139720, now seen corresponding path program 2 times [2020-12-09 08:30:33,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:30:33,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372538651] [2020-12-09 08:30:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:30:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:30:33,190 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:30:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:30:33,210 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:30:33,222 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 08:30:33,223 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:30:33,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2020-12-09 08:30:33,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:30:33 BoogieIcfgContainer [2020-12-09 08:30:33,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:30:33,243 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:30:33,243 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:30:33,244 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:30:33,244 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:30:22" (3/4) ... [2020-12-09 08:30:33,245 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 08:30:33,274 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5c3f2e0d-7bc0-4f8f-baf4-0c09eb71bc6e/bin/utaipan/witness.graphml [2020-12-09 08:30:33,274 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:30:33,274 INFO L168 Benchmark]: Toolchain (without parser) took 10929.39 ms. Allocated memory was 134.2 MB in the beginning and 283.1 MB in the end (delta: 148.9 MB). Free memory was 98.2 MB in the beginning and 158.1 MB in the end (delta: -59.9 MB). Peak memory consumption was 88.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,275 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 134.2 MB. Free memory is still 114.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:30:33,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.99 ms. Allocated memory is still 134.2 MB. Free memory was 98.1 MB in the beginning and 108.7 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.16 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 107.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,275 INFO L168 Benchmark]: Boogie Preprocessor took 18.84 ms. Allocated memory is still 134.2 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,276 INFO L168 Benchmark]: RCFGBuilder took 349.72 ms. Allocated memory is still 134.2 MB. Free memory was 106.0 MB in the beginning and 81.8 MB in the end (delta: 24.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,276 INFO L168 Benchmark]: TraceAbstraction took 10317.87 ms. Allocated memory was 134.2 MB in the beginning and 283.1 MB in the end (delta: 148.9 MB). Free memory was 81.8 MB in the beginning and 160.2 MB in the end (delta: -78.5 MB). Peak memory consumption was 72.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,276 INFO L168 Benchmark]: Witness Printer took 30.53 ms. Allocated memory is still 283.1 MB. Free memory was 160.2 MB in the beginning and 158.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:30:33,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 134.2 MB. Free memory is still 114.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.99 ms. Allocated memory is still 134.2 MB. Free memory was 98.1 MB in the beginning and 108.7 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.16 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 107.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.84 ms. Allocated memory is still 134.2 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 349.72 ms. Allocated memory is still 134.2 MB. Free memory was 106.0 MB in the beginning and 81.8 MB in the end (delta: 24.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10317.87 ms. Allocated memory was 134.2 MB in the beginning and 283.1 MB in the end (delta: 148.9 MB). Free memory was 81.8 MB in the beginning and 160.2 MB in the end (delta: -78.5 MB). Peak memory consumption was 72.0 MB. Max. memory is 16.1 GB. * Witness Printer took 30.53 ms. Allocated memory is still 283.1 MB. Free memory was 160.2 MB in the beginning and 158.1 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: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 [L35] COND TRUE i