./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 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/invert_string-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer --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 Automizer --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 0.2.0-69874e2 [2020-12-01 15:51:44,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:51:44,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:51:44,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:51:44,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:51:44,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:51:44,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:51:44,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:51:44,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:51:44,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:51:44,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:51:44,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:51:44,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:51:44,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:51:44,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:51:44,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:51:44,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:51:44,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:51:44,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:51:44,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:51:44,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:51:44,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:51:44,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:51:44,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:51:44,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:51:44,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:51:44,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:51:44,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:51:44,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:51:44,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:51:44,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:51:44,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:51:44,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:51:44,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:51:44,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:51:44,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:51:44,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:51:44,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:51:44,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:51:44,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:51:44,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:51:44,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:51:44,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:51:44,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:51:44,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:51:44,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:51:44,566 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:51:44,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:51:44,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:51:44,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:51:44,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:51:44,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:51:44,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:51:44,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:51:44,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:51:44,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:51:44,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:51:44,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:51:44,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:51:44,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:51:44,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:51:44,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:51:44,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:51:44,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:51:44,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:51:44,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:51:44,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:51:44,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:51:44,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:51:44,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:51:44,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:51:44,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b9a71645175fee79e6d6cd797db38ce6044ffb9 [2020-12-01 15:51:44,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:51:44,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:51:44,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:51:44,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:51:44,977 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:51:44,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/../../sv-benchmarks/c/loops/invert_string-1.c [2020-12-01 15:51:45,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/data/a3a686e04/e9e6fc8eda6f4da7b7987be4711679b4/FLAG658b3f179 [2020-12-01 15:51:45,657 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:51:45,657 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/sv-benchmarks/c/loops/invert_string-1.c [2020-12-01 15:51:45,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/data/a3a686e04/e9e6fc8eda6f4da7b7987be4711679b4/FLAG658b3f179 [2020-12-01 15:51:46,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/data/a3a686e04/e9e6fc8eda6f4da7b7987be4711679b4 [2020-12-01 15:51:46,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:51:46,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:51:46,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:51:46,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:51:46,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:51:46,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44165da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46, skipping insertion in model container [2020-12-01 15:51:46,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:51:46,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:51:46,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:51:46,340 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:51:46,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:51:46,414 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:51:46,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46 WrapperNode [2020-12-01 15:51:46,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:51:46,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:51:46,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:51:46,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:51:46,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:51:46,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:51:46,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:51:46,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:51:46,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... [2020-12-01 15:51:46,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:51:46,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:51:46,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:51:46,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:51:46,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/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 [2020-12-01 15:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:51:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:51:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:51:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:51:47,052 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:51:47,052 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-01 15:51:47,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:51:47 BoogieIcfgContainer [2020-12-01 15:51:47,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:51:47,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:51:47,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:51:47,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:51:47,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:51:46" (1/3) ... [2020-12-01 15:51:47,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbab479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:51:47, skipping insertion in model container [2020-12-01 15:51:47,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:51:46" (2/3) ... [2020-12-01 15:51:47,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbab479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:51:47, skipping insertion in model container [2020-12-01 15:51:47,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:51:47" (3/3) ... [2020-12-01 15:51:47,088 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-12-01 15:51:47,122 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:51:47,126 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:51:47,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:51:47,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:51:47,211 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:51:47,211 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:51:47,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:51:47,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:51:47,212 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:51:47,212 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:51:47,212 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:51:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-01 15:51:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:51:47,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:47,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:47,237 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:47,245 INFO L82 PathProgramCache]: Analyzing trace with hash -56209308, now seen corresponding path program 1 times [2020-12-01 15:51:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:47,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426473468] [2020-12-01 15:51:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:47,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426473468] [2020-12-01 15:51:47,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:51:47,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:51:47,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602913386] [2020-12-01 15:51:47,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:51:47,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:47,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:51:47,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:51:47,507 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-01 15:51:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:47,530 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-12-01 15:51:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:51:47,531 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-01 15:51:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:47,542 INFO L225 Difference]: With dead ends: 38 [2020-12-01 15:51:47,543 INFO L226 Difference]: Without dead ends: 16 [2020-12-01 15:51:47,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:51:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-01 15:51:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-01 15:51:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-01 15:51:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-01 15:51:47,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2020-12-01 15:51:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:47,609 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-01 15:51:47,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:51:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-01 15:51:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:51:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:47,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:47,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:51:47,612 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:47,617 INFO L82 PathProgramCache]: Analyzing trace with hash -411746854, now seen corresponding path program 1 times [2020-12-01 15:51:47,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:47,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406413609] [2020-12-01 15:51:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:47,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406413609] [2020-12-01 15:51:47,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:51:47,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:51:47,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839553242] [2020-12-01 15:51:47,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:51:47,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:47,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:51:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:51:47,800 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-12-01 15:51:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:47,899 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-01 15:51:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:51:47,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-01 15:51:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:47,902 INFO L225 Difference]: With dead ends: 34 [2020-12-01 15:51:47,902 INFO L226 Difference]: Without dead ends: 24 [2020-12-01 15:51:47,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:51:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-01 15:51:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2020-12-01 15:51:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-01 15:51:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-01 15:51:47,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-12-01 15:51:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:47,921 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-01 15:51:47,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:51:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-01 15:51:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 15:51:47,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:47,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:47,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:51:47,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1790951096, now seen corresponding path program 1 times [2020-12-01 15:51:47,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:47,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138418344] [2020-12-01 15:51:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:51:48,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138418344] [2020-12-01 15:51:48,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:51:48,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:51:48,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911884448] [2020-12-01 15:51:48,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:51:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:51:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:51:48,081 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-12-01 15:51:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:48,164 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-01 15:51:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:51:48,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-01 15:51:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:48,167 INFO L225 Difference]: With dead ends: 25 [2020-12-01 15:51:48,168 INFO L226 Difference]: Without dead ends: 18 [2020-12-01 15:51:48,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:51:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-01 15:51:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-01 15:51:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-01 15:51:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-01 15:51:48,188 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-12-01 15:51:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:48,188 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-01 15:51:48,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:51:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-01 15:51:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:51:48,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:48,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:48,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:51:48,192 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash 467501014, now seen corresponding path program 1 times [2020-12-01 15:51:48,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:48,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816138725] [2020-12-01 15:51:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:48,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816138725] [2020-12-01 15:51:48,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189716584] [2020-12-01 15:51:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/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 [2020-12-01 15:51:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-01 15:51:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:51:49,073 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 10 treesize of output 8 [2020-12-01 15:51:49,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:49,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:49,105 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:49,106 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-01 15:51:49,187 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 [2020-12-01 15:51:49,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:49,206 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:49,210 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:49,212 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-01 15:51:49,282 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 15:51:49,286 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 [2020-12-01 15:51:49,296 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:49,317 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:49,319 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:49,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2020-12-01 15:51:49,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:49,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:49,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:49,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:49,510 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:51:49,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:49,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:51:49,535 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 15:51:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:49,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:51:49,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-01 15:51:49,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721315054] [2020-12-01 15:51:49,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 15:51:49,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 15:51:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:51:49,572 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 15 states. [2020-12-01 15:51:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:50,196 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-01 15:51:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:51:50,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2020-12-01 15:51:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:50,201 INFO L225 Difference]: With dead ends: 39 [2020-12-01 15:51:50,201 INFO L226 Difference]: Without dead ends: 22 [2020-12-01 15:51:50,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:51:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-01 15:51:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-01 15:51:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-01 15:51:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-01 15:51:50,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-12-01 15:51:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:50,213 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-01 15:51:50,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 15:51:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-01 15:51:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-01 15:51:50,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:50,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:50,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:51:50,423 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash 35676596, now seen corresponding path program 2 times [2020-12-01 15:51:50,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:50,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575931199] [2020-12-01 15:51:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:50,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575931199] [2020-12-01 15:51:50,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225031108] [2020-12-01 15:51:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/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 [2020-12-01 15:51:50,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:51:50,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:51:50,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:51:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:51:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:50,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:51:50,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-12-01 15:51:50,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243512766] [2020-12-01 15:51:50,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:51:50,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:51:50,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:51:50,703 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-12-01 15:51:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:50,841 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-01 15:51:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:51:50,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-01 15:51:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:50,848 INFO L225 Difference]: With dead ends: 35 [2020-12-01 15:51:50,853 INFO L226 Difference]: Without dead ends: 28 [2020-12-01 15:51:50,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:51:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-01 15:51:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-12-01 15:51:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-01 15:51:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-01 15:51:50,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-12-01 15:51:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:50,863 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-01 15:51:50,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:51:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-01 15:51:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-01 15:51:50,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:50,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:51,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:51:51,079 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1570853842, now seen corresponding path program 3 times [2020-12-01 15:51:51,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:51,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512147823] [2020-12-01 15:51:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512147823] [2020-12-01 15:51:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287139763] [2020-12-01 15:51:51,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/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 [2020-12-01 15:51:51,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-01 15:51:51,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:51:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-01 15:51:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:51:51,611 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 10 treesize of output 8 [2020-12-01 15:51:51,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:51,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:51,633 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:51,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-01 15:51:51,797 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2020-12-01 15:51:51,798 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:51,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:51,816 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:51,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-01 15:51:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 15:51:51,909 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2020-12-01 15:51:51,911 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:51,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:51,929 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:51,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2020-12-01 15:51:52,060 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:52,064 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:52,069 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:52,072 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 15:51:52,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 15:51:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:52,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:51:52,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-12-01 15:51:52,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986414980] [2020-12-01 15:51:52,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:51:52,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:51:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:51:52,122 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 18 states. [2020-12-01 15:51:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:53,446 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-12-01 15:51:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-01 15:51:53,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-12-01 15:51:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:53,448 INFO L225 Difference]: With dead ends: 51 [2020-12-01 15:51:53,448 INFO L226 Difference]: Without dead ends: 42 [2020-12-01 15:51:53,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2020-12-01 15:51:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-01 15:51:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-12-01 15:51:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-01 15:51:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-01 15:51:53,458 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2020-12-01 15:51:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:53,459 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-01 15:51:53,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:51:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-01 15:51:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 15:51:53,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:53,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:53,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:51:53,671 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:53,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1044113744, now seen corresponding path program 4 times [2020-12-01 15:51:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:53,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658954995] [2020-12-01 15:51:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:53,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658954995] [2020-12-01 15:51:53,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937917770] [2020-12-01 15:51:53,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/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 [2020-12-01 15:51:53,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:51:53,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:51:53,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-01 15:51:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:51:53,881 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 10 treesize of output 8 [2020-12-01 15:51:53,883 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:53,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:53,890 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:53,891 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-01 15:51:54,051 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2020-12-01 15:51:54,061 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:54,077 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:54,078 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:54,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-01 15:51:54,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:51:54,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:51:54,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:54,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:54,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 15:51:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-01 15:51:54,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:51:54,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2020-12-01 15:51:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037998226] [2020-12-01 15:51:54,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 15:51:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 15:51:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:51:54,306 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 16 states. [2020-12-01 15:51:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:55,604 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-12-01 15:51:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-01 15:51:55,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-12-01 15:51:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:55,606 INFO L225 Difference]: With dead ends: 73 [2020-12-01 15:51:55,606 INFO L226 Difference]: Without dead ends: 66 [2020-12-01 15:51:55,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2020-12-01 15:51:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-01 15:51:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-12-01 15:51:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-01 15:51:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-01 15:51:55,619 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2020-12-01 15:51:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:55,619 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-01 15:51:55,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 15:51:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-01 15:51:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:51:55,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:55,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:55,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:51:55,847 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1020544562, now seen corresponding path program 5 times [2020-12-01 15:51:55,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:55,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82838471] [2020-12-01 15:51:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:51:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82838471] [2020-12-01 15:51:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255028653] [2020-12-01 15:51:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:51:56,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-01 15:51:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:51:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-01 15:51:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:51:56,504 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 10 treesize of output 8 [2020-12-01 15:51:56,507 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:56,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:56,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:51:56,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-01 15:51:56,678 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2020-12-01 15:51:56,683 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:51:56,704 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:51:56,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-01 15:51:56,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2020-12-01 15:51:56,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:51:56,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:51:56,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:56,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 15:51:56,902 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-01 15:51:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:51:56,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:51:56,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2020-12-01 15:51:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822230726] [2020-12-01 15:51:56,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:51:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:51:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:51:56,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:51:56,945 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 18 states. [2020-12-01 15:51:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:51:58,687 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-12-01 15:51:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-01 15:51:58,687 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-12-01 15:51:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:51:58,688 INFO L225 Difference]: With dead ends: 77 [2020-12-01 15:51:58,688 INFO L226 Difference]: Without dead ends: 75 [2020-12-01 15:51:58,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2020-12-01 15:51:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-01 15:51:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2020-12-01 15:51:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 15:51:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-01 15:51:58,703 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 23 [2020-12-01 15:51:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:51:58,704 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-01 15:51:58,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:51:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-01 15:51:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-01 15:51:58,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:51:58,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:51:58,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:51:58,918 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:51:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:51:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1322104934, now seen corresponding path program 1 times [2020-12-01 15:51:58,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:51:58,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610557857] [2020-12-01 15:51:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:51:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:51:58,975 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:51:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:51:59,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:51:59,030 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:51:59,033 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:51:59,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-01 15:51:59,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:51:59 BoogieIcfgContainer [2020-12-01 15:51:59,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:51:59,078 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:51:59,078 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:51:59,079 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:51:59,079 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:51:47" (3/4) ... [2020-12-01 15:51:59,082 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:51:59,178 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9410180a-f6e1-4d0c-aa19-3df40875ce0d/bin/uautomizer/witness.graphml [2020-12-01 15:51:59,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:51:59,179 INFO L168 Benchmark]: Toolchain (without parser) took 13165.29 ms. Allocated memory was 100.7 MB in the beginning and 161.5 MB in the end (delta: 60.8 MB). Free memory was 70.4 MB in the beginning and 46.8 MB in the end (delta: 23.6 MB). Peak memory consumption was 84.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:51:59,183 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:51:59,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.59 ms. Allocated memory is still 100.7 MB. Free memory was 70.2 MB in the beginning and 77.7 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:51:59,185 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.03 ms. Allocated memory is still 100.7 MB. Free memory was 77.7 MB in the beginning and 76.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:51:59,185 INFO L168 Benchmark]: Boogie Preprocessor took 64.58 ms. Allocated memory is still 100.7 MB. Free memory was 76.1 MB in the beginning and 75.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:51:59,188 INFO L168 Benchmark]: RCFGBuilder took 508.68 ms. Allocated memory is still 100.7 MB. Free memory was 75.1 MB in the beginning and 60.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-01 15:51:59,189 INFO L168 Benchmark]: TraceAbstraction took 12021.44 ms. Allocated memory was 100.7 MB in the beginning and 161.5 MB in the end (delta: 60.8 MB). Free memory was 60.4 MB in the beginning and 49.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 74.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:51:59,190 INFO L168 Benchmark]: Witness Printer took 99.97 ms. Allocated memory is still 161.5 MB. Free memory was 49.9 MB in the beginning and 46.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:51:59,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 33.6 MB in the beginning and 33.6 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.59 ms. Allocated memory is still 100.7 MB. Free memory was 70.2 MB in the beginning and 77.7 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.03 ms. Allocated memory is still 100.7 MB. Free memory was 77.7 MB in the beginning and 76.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.58 ms. Allocated memory is still 100.7 MB. Free memory was 76.1 MB in the beginning and 75.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 508.68 ms. Allocated memory is still 100.7 MB. Free memory was 75.1 MB in the beginning and 60.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12021.44 ms. Allocated memory was 100.7 MB in the beginning and 161.5 MB in the end (delta: 60.8 MB). Free memory was 60.4 MB in the beginning and 49.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 74.4 MB. Max. memory is 16.1 GB. * Witness Printer took 99.97 ms. Allocated memory is still 161.5 MB. Free memory was 49.9 MB in the beginning and 46.8 MB in the end (delta: 3.1 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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