./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_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/invert_string-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/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 [2020-12-03 12:33:33,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:33:33,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:33:33,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:33:33,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:33:33,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:33:33,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:33:33,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:33:33,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:33:33,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:33:33,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:33:33,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:33:33,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:33:33,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:33:33,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:33:33,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:33:33,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:33:33,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:33:33,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:33:33,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:33:33,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:33:33,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:33:33,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:33:33,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:33:33,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:33:33,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:33:33,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:33:33,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:33:33,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:33:33,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:33:33,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:33:33,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:33:33,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:33:33,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:33:33,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:33:33,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:33:33,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:33:33,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:33:33,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:33:33,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:33:33,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:33:33,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:33:33,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:33:33,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:33:33,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:33:33,432 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:33:33,433 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:33:33,433 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:33:33,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:33:33,434 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:33:33,434 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:33:33,434 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:33:33,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:33:33,436 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:33:33,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:33:33,436 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:33:33,437 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:33:33,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:33:33,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:33:33,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:33:33,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:33:33,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:33:33,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:33:33,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:33:33,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:33:33,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:33:33,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:33:33,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:33:33,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:33:33,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:33:33,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:33:33,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:33:33,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:33:33,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:33:33,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:33:33,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:33:33,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:33:33,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:33:33,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:33:33,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:33:33,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:33:33,445 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_ef0cb431-4ca7-4bae-8211-9b811aa87659/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b9a71645175fee79e6d6cd797db38ce6044ffb9 [2020-12-03 12:33:33,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:33:33,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:33:33,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:33:33,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:33:33,743 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:33:33,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-1.c [2020-12-03 12:33:33,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/data/b4f9c0eb1/543b044553d240f1b7b3b343b84c8c3e/FLAGa81bb5c9e [2020-12-03 12:33:34,254 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:33:34,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/sv-benchmarks/c/loops/invert_string-1.c [2020-12-03 12:33:34,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/data/b4f9c0eb1/543b044553d240f1b7b3b343b84c8c3e/FLAGa81bb5c9e [2020-12-03 12:33:34,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/data/b4f9c0eb1/543b044553d240f1b7b3b343b84c8c3e [2020-12-03 12:33:34,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:33:34,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:33:34,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:33:34,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:33:34,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:33:34,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:33:34" (1/1) ... [2020-12-03 12:33:34,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8cc5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:34, skipping insertion in model container [2020-12-03 12:33:34,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:33:34" (1/1) ... [2020-12-03 12:33:34,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:33:34,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:33:34,972 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_ef0cb431-4ca7-4bae-8211-9b811aa87659/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2020-12-03 12:33:35,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:33:35,029 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:33:35,041 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_ef0cb431-4ca7-4bae-8211-9b811aa87659/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2020-12-03 12:33:35,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:33:35,063 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:33:35,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35 WrapperNode [2020-12-03 12:33:35,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:33:35,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:33:35,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:33:35,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:33:35,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:33:35,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:33:35,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:33:35,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:33:35,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... [2020-12-03 12:33:35,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:33:35,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:33:35,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:33:35,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:33:35,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/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 [2020-12-03 12:33:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:33:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:33:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:33:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:33:35,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:33:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:33:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:33:35,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:33:35,586 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-03 12:33:35,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:33:35 BoogieIcfgContainer [2020-12-03 12:33:35,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:33:35,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:33:35,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:33:35,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:33:35,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:33:34" (1/3) ... [2020-12-03 12:33:35,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b898255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:33:35, skipping insertion in model container [2020-12-03 12:33:35,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:33:35" (2/3) ... [2020-12-03 12:33:35,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b898255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:33:35, skipping insertion in model container [2020-12-03 12:33:35,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:33:35" (3/3) ... [2020-12-03 12:33:35,606 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-12-03 12:33:35,635 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:33:35,653 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:33:35,664 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:33:35,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:33:35,716 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:33:35,716 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:33:35,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:33:35,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:33:35,717 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:33:35,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:33:35,717 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:33:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-03 12:33:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:33:35,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:35,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:33:35,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1098288631, now seen corresponding path program 1 times [2020-12-03 12:33:35,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:35,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139584680] [2020-12-03 12:33:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139584680] [2020-12-03 12:33:36,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:33:36,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:33:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880475114] [2020-12-03 12:33:36,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:33:36,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:33:36,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:33:36,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:33:36,042 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-12-03 12:33:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:36,112 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2020-12-03 12:33:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:33:36,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:33:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:36,122 INFO L225 Difference]: With dead ends: 17 [2020-12-03 12:33:36,123 INFO L226 Difference]: Without dead ends: 9 [2020-12-03 12:33:36,125 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 [2020-12-03 12:33:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-03 12:33:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-03 12:33:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-03 12:33:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2020-12-03 12:33:36,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2020-12-03 12:33:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:36,157 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-12-03 12:33:36,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:33:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2020-12-03 12:33:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:33:36,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:36,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:33:36,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:33:36,159 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 62424348, now seen corresponding path program 1 times [2020-12-03 12:33:36,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:36,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885631291] [2020-12-03 12:33:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:33:36,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885631291] [2020-12-03 12:33:36,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:33:36,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:33:36,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972893] [2020-12-03 12:33:36,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:33:36,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:33:36,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:33:36,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:33:36,273 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2020-12-03 12:33:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:36,332 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-12-03 12:33:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:33:36,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-03 12:33:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:36,339 INFO L225 Difference]: With dead ends: 15 [2020-12-03 12:33:36,339 INFO L226 Difference]: Without dead ends: 10 [2020-12-03 12:33:36,340 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 [2020-12-03 12:33:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-03 12:33:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-03 12:33:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-03 12:33:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-03 12:33:36,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-03 12:33:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:36,344 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-03 12:33:36,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:33:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-03 12:33:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:33:36,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:36,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:33:36,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:33:36,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1931368436, now seen corresponding path program 1 times [2020-12-03 12:33:36,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:36,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803323607] [2020-12-03 12:33:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803323607] [2020-12-03 12:33:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119950329] [2020-12-03 12:33:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/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 [2020-12-03 12:33:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-03 12:33:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:33:36,883 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 [2020-12-03 12:33:36,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:33:36,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:36,926 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:33:36,927 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:33, output treesize:17 [2020-12-03 12:33:37,000 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 [2020-12-03 12:33:37,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:33:37,019 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:37,022 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:33:37,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-03 12:33:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-03 12:33:37,077 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 [2020-12-03 12:33:37,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 12:33:37,095 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:37,097 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-03 12:33:37,098 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2020-12-03 12:33:37,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 12:33:37,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 12:33:37,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 12:33:37,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 12:33:37,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-03 12:33:37,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 12:33:37,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-03 12:33:37,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-03 12:33:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:37,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:33:37,424 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:37,425 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 [2020-12-03 12:33:37,431 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,432 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,436 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,439 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,440 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-03 12:33:37,441 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,443 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,447 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,451 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,454 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,455 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,459 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,462 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,465 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,466 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,468 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,473 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,478 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,480 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,487 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,489 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,491 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,492 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,493 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,496 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,497 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,499 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,502 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,505 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,506 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,508 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,511 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,514 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,516 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,518 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,524 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-03 12:33:37,526 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-03 12:33:37,528 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,533 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,534 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,535 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,536 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-03 12:33:37,537 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,539 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,542 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,546 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,547 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,549 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,551 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,554 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,555 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,557 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,558 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,564 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,567 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,570 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,574 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,576 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,578 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,581 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,584 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,594 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,605 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,607 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,609 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,612 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,613 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,617 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,618 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,620 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,621 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,623 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-03 12:33:37,624 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-03 12:33:37,625 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,628 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,629 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,630 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,631 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,632 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,634 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,637 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,638 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,643 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,644 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,646 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,647 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,649 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,650 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,651 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 5 conjuncts [2020-12-03 12:33:37,653 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-12-03 12:33:37,654 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,689 INFO L348 Elim1Store]: treesize reduction 15, result has 65.1 percent of original size [2020-12-03 12:33:37,690 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 [2020-12-03 12:33:37,697 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,697 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,701 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,702 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-03 12:33:37,708 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,720 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,721 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,722 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,722 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-12-03 12:33:37,723 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,730 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-03 12:33:37,779 INFO L625 ElimStorePlain]: treesize reduction 81, result has 28.9 percent of original size [2020-12-03 12:33:37,788 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:37,789 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 [2020-12-03 12:33:37,791 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,792 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,796 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,872 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:37,873 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 [2020-12-03 12:33:37,877 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,879 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,885 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,886 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,888 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,891 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 6 conjuncts [2020-12-03 12:33:37,892 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,893 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,893 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,894 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,896 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,898 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,899 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,900 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,902 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,903 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,904 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,905 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,907 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,907 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,909 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,910 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,911 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,912 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,913 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,914 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,916 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,917 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,918 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-12-03 12:33:37,920 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,921 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,921 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,923 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,924 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,925 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,926 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,928 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,929 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-12-03 12:33:37,929 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,930 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,931 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,932 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,933 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,933 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,934 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,936 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,937 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,938 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:37,963 INFO L348 Elim1Store]: treesize reduction 15, result has 65.1 percent of original size [2020-12-03 12:33:37,964 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 [2020-12-03 12:33:37,968 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,969 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,971 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-03 12:33:37,971 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,972 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,973 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,974 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,975 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,976 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,976 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-12-03 12:33:37,977 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,977 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,978 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,979 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,980 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-03 12:33:37,981 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,982 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,983 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,984 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,987 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-12-03 12:33:37,987 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,988 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-03 12:33:37,989 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,989 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,991 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,991 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:37,996 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,997 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,997 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-12-03 12:33:37,998 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:37,998 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,000 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,001 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,003 INFO L639 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-12-03 12:33:38,004 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,006 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,011 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:38,012 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,013 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-03 12:33:38,088 INFO L625 ElimStorePlain]: treesize reduction 105, result has 23.9 percent of original size [2020-12-03 12:33:38,097 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 12:33:38,097 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 [2020-12-03 12:33:38,100 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:33:38,101 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-03 12:33:38,102 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-12-03 12:33:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:38,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702820156] [2020-12-03 12:33:38,186 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:33:38,186 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:33:38,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:33:38,200 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:33:38,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:33:38,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:33:38,687 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-03 12:33:39,435 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:33:39,614 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-03 12:33:39,782 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-03 12:33:40,001 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-03 12:33:40,266 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-03 12:33:40,268 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:33:40,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:33:40,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2020-12-03 12:33:40,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632853704] [2020-12-03 12:33:40,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-03 12:33:40,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:33:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-03 12:33:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-12-03 12:33:40,273 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 17 states. [2020-12-03 12:33:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:40,911 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-03 12:33:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-03 12:33:40,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 8 [2020-12-03 12:33:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:40,912 INFO L225 Difference]: With dead ends: 29 [2020-12-03 12:33:40,912 INFO L226 Difference]: Without dead ends: 27 [2020-12-03 12:33:40,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2020-12-03 12:33:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-03 12:33:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2020-12-03 12:33:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-03 12:33:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-03 12:33:40,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2020-12-03 12:33:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:40,919 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-03 12:33:40,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-03 12:33:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-03 12:33:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:33:40,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:40,920 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:33:41,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-03 12:33:41,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash 685044295, now seen corresponding path program 2 times [2020-12-03 12:33:41,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:41,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346340815] [2020-12-03 12:33:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:41,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346340815] [2020-12-03 12:33:41,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489062423] [2020-12-03 12:33:41,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/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 [2020-12-03 12:33:41,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-03 12:33:41,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:33:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:33:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:33:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:41,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:33:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:41,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735104938] [2020-12-03 12:33:41,328 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:33:41,328 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:33:41,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:33:41,328 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:33:41,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:33:41,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:33:41,630 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-03 12:33:42,286 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:33:42,432 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-03 12:33:42,582 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-03 12:33:42,754 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-03 12:33:42,972 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-03 12:33:42,973 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:33:42,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:33:42,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2020-12-03 12:33:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412749840] [2020-12-03 12:33:42,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:33:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:33:42,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:33:42,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:33:42,977 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 5 states. [2020-12-03 12:33:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:43,056 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-03 12:33:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:33:43,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:33:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:43,058 INFO L225 Difference]: With dead ends: 28 [2020-12-03 12:33:43,059 INFO L226 Difference]: Without dead ends: 23 [2020-12-03 12:33:43,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:33:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-03 12:33:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-12-03 12:33:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-03 12:33:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-03 12:33:43,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2020-12-03 12:33:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:43,069 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-03 12:33:43,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:33:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-03 12:33:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:33:43,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:43,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:33:43,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-03 12:33:43,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash -242249687, now seen corresponding path program 3 times [2020-12-03 12:33:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:43,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054075098] [2020-12-03 12:33:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:33:43,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054075098] [2020-12-03 12:33:43,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830626978] [2020-12-03 12:33:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/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 [2020-12-03 12:33:43,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:33:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:33:43,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-03 12:33:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:33:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:33:43,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:33:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:33:44,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610503912] [2020-12-03 12:33:44,146 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:33:44,147 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:33:44,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:33:44,147 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:33:44,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:33:44,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:33:44,443 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-03 12:33:45,084 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:33:45,271 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-03 12:33:45,456 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-03 12:33:45,637 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-03 12:33:45,881 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-03 12:33:45,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:33:45,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:33:45,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2020-12-03 12:33:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915048586] [2020-12-03 12:33:45,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-03 12:33:45,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:33:45,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-03 12:33:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-12-03 12:33:45,889 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 19 states. [2020-12-03 12:33:46,821 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-03 12:33:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:48,826 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-12-03 12:33:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-03 12:33:48,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2020-12-03 12:33:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:48,828 INFO L225 Difference]: With dead ends: 80 [2020-12-03 12:33:48,828 INFO L226 Difference]: Without dead ends: 78 [2020-12-03 12:33:48,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=529, Invalid=2331, Unknown=2, NotChecked=0, Total=2862 [2020-12-03 12:33:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-03 12:33:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 21. [2020-12-03 12:33:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:33:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2020-12-03 12:33:48,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 10 [2020-12-03 12:33:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:48,839 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2020-12-03 12:33:48,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-03 12:33:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2020-12-03 12:33:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:33:48,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:48,840 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:33:49,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:33:49,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2020408077, now seen corresponding path program 1 times [2020-12-03 12:33:49,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:49,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104360900] [2020-12-03 12:33:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:33:49,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104360900] [2020-12-03 12:33:49,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090232151] [2020-12-03 12:33:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/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 [2020-12-03 12:33:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:33:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:33:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:33:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:33:49,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:33:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:33:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243550432] [2020-12-03 12:33:49,247 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-03 12:33:49,247 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:33:49,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:33:49,248 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:33:49,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:33:49,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:33:49,516 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-03 12:33:50,219 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:33:50,417 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-03 12:33:50,565 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-03 12:33:50,733 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-03 12:33:51,246 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-03 12:33:51,414 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-12-03 12:33:51,605 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-03 12:33:51,606 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:33:51,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:33:51,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2020-12-03 12:33:51,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519240302] [2020-12-03 12:33:51,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:33:51,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:33:51,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:33:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:33:51,608 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand 10 states. [2020-12-03 12:33:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:51,729 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-03 12:33:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:33:51,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-03 12:33:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:51,731 INFO L225 Difference]: With dead ends: 42 [2020-12-03 12:33:51,731 INFO L226 Difference]: Without dead ends: 31 [2020-12-03 12:33:51,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-12-03 12:33:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-03 12:33:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2020-12-03 12:33:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-03 12:33:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2020-12-03 12:33:51,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 11 [2020-12-03 12:33:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:51,740 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2020-12-03 12:33:51,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:33:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2020-12-03 12:33:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 12:33:51,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:33:51,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:33:51,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:33:51,962 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:33:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:33:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1310139720, now seen corresponding path program 2 times [2020-12-03 12:33:51,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:33:51,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940518116] [2020-12-03 12:33:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:33:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:33:51,988 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:33:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:33:52,022 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:33:52,046 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:33:52,046 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:33:52,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2020-12-03 12:33:52,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:33:52 BoogieIcfgContainer [2020-12-03 12:33:52,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:33:52,100 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:33:52,100 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:33:52,100 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:33:52,101 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:33:35" (3/4) ... [2020-12-03 12:33:52,102 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:33:52,169 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ef0cb431-4ca7-4bae-8211-9b811aa87659/bin/utaipan/witness.graphml [2020-12-03 12:33:52,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:33:52,170 INFO L168 Benchmark]: Toolchain (without parser) took 17384.80 ms. Allocated memory was 81.8 MB in the beginning and 201.3 MB in the end (delta: 119.5 MB). Free memory was 48.6 MB in the beginning and 136.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 31.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:52,170 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:52,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.10 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 48.4 MB in the beginning and 86.4 MB in the end (delta: -37.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:52,171 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.93 ms. Allocated memory is still 109.1 MB. Free memory was 86.4 MB in the beginning and 84.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:52,171 INFO L168 Benchmark]: Boogie Preprocessor took 26.04 ms. Allocated memory is still 109.1 MB. Free memory was 84.7 MB in the beginning and 83.8 MB in the end (delta: 912.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:52,172 INFO L168 Benchmark]: RCFGBuilder took 456.97 ms. Allocated memory is still 109.1 MB. Free memory was 83.4 MB in the beginning and 59.9 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:52,173 INFO L168 Benchmark]: TraceAbstraction took 16509.45 ms. Allocated memory was 109.1 MB in the beginning and 201.3 MB in the end (delta: 92.3 MB). Free memory was 59.2 MB in the beginning and 138.9 MB in the end (delta: -79.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:52,173 INFO L168 Benchmark]: Witness Printer took 69.29 ms. Allocated memory is still 201.3 MB. Free memory was 138.9 MB in the beginning and 136.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:52,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 81.8 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.10 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 48.4 MB in the beginning and 86.4 MB in the end (delta: -37.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.93 ms. Allocated memory is still 109.1 MB. Free memory was 86.4 MB in the beginning and 84.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.04 ms. Allocated memory is still 109.1 MB. Free memory was 84.7 MB in the beginning and 83.8 MB in the end (delta: 912.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 456.97 ms. Allocated memory is still 109.1 MB. Free memory was 83.4 MB in the beginning and 59.9 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16509.45 ms. Allocated memory was 109.1 MB in the beginning and 201.3 MB in the end (delta: 92.3 MB). Free memory was 59.2 MB in the beginning and 138.9 MB in the end (delta: -79.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * Witness Printer took 69.29 ms. Allocated memory is still 201.3 MB. Free memory was 138.9 MB in the beginning and 136.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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