./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC --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 826ba3ecb74a591f4e23afc2c932e6d22d2291c8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC --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 826ba3ecb74a591f4e23afc2c932e6d22d2291c8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2021-10-11 00:29:24,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:29:24,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:29:24,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:29:24,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:29:24,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:29:24,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:29:24,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:29:24,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:29:24,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:29:24,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:29:24,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:29:24,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:29:24,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:29:24,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:29:24,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:29:24,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:29:24,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:29:24,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:29:24,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:29:24,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:29:24,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:29:24,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:29:24,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:29:24,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:29:24,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:29:24,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:29:24,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:29:24,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:29:24,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:29:24,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:29:24,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:29:24,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:29:24,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:29:24,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:29:24,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:29:24,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:29:24,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:29:24,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:29:24,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:29:24,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:29:24,360 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:29:24,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:29:24,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:29:24,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:29:24,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:29:24,408 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:29:24,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:29:24,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:29:24,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:29:24,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:29:24,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:29:24,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:29:24,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:29:24,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:29:24,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:29:24,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:29:24,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:29:24,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:29:24,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:29:24,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:29:24,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:29:24,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:29:24,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:29:24,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:29:24,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:29:24,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:29:24,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:29:24,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:29:24,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:29:24,422 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_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 826ba3ecb74a591f4e23afc2c932e6d22d2291c8 [2021-10-11 00:29:24,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:29:24,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:29:24,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:29:24,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:29:24,736 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:29:24,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loops/string-2.i [2021-10-11 00:29:24,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/522016aa9/bd96c525456846339a147e1e2cce76b7/FLAGe80a0c068 [2021-10-11 00:29:25,458 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:29:25,459 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/sv-benchmarks/c/loops/string-2.i [2021-10-11 00:29:25,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/522016aa9/bd96c525456846339a147e1e2cce76b7/FLAGe80a0c068 [2021-10-11 00:29:25,794 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/522016aa9/bd96c525456846339a147e1e2cce76b7 [2021-10-11 00:29:25,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:29:25,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:29:25,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:29:25,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:29:25,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:29:25,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:25" (1/1) ... [2021-10-11 00:29:25,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ce5cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:25, skipping insertion in model container [2021-10-11 00:29:25,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:25" (1/1) ... [2021-10-11 00:29:25,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:29:25,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:29:26,009 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-11 00:29:26,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:29:26,044 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:29:26,057 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-11 00:29:26,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:29:26,084 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:29:26,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26 WrapperNode [2021-10-11 00:29:26,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:29:26,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:29:26,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:29:26,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:29:26,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:29:26,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:29:26,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:29:26,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:29:26,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... [2021-10-11 00:29:26,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:29:26,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:29:26,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:29:26,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:29:26,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:29:26,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:29:26,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:29:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:29:26,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:29:26,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:29:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:29:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:29:26,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:29:26,596 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 00:29:26,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:26 BoogieIcfgContainer [2021-10-11 00:29:26,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:29:26,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:29:26,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:29:26,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:29:26,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:29:25" (1/3) ... [2021-10-11 00:29:26,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1754268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:26, skipping insertion in model container [2021-10-11 00:29:26,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:26" (2/3) ... [2021-10-11 00:29:26,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1754268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:26, skipping insertion in model container [2021-10-11 00:29:26,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:26" (3/3) ... [2021-10-11 00:29:26,606 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2021-10-11 00:29:26,620 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:29:26,623 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:29:26,636 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:29:26,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:29:26,662 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:29:26,662 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:29:26,662 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:29:26,662 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:29:26,662 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:29:26,663 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:29:26,663 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:29:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-10-11 00:29:26,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:29:26,684 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:26,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:26,685 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-11 00:29:26,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:26,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421454433] [2021-10-11 00:29:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:26,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421454433] [2021-10-11 00:29:26,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:26,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:29:26,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952090984] [2021-10-11 00:29:26,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:29:26,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:29:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:29:26,906 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2021-10-11 00:29:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:26,923 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2021-10-11 00:29:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:29:26,925 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2021-10-11 00:29:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:26,933 INFO L225 Difference]: With dead ends: 48 [2021-10-11 00:29:26,934 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 00:29:26,937 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 [2021-10-11 00:29:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 00:29:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 00:29:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:29:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-11 00:29:26,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-10-11 00:29:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:26,970 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-11 00:29:26,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:29:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-11 00:29:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:29:26,971 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:26,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:26,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:29:26,972 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2021-10-11 00:29:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:26,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356823712] [2021-10-11 00:29:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:27,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356823712] [2021-10-11 00:29:27,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:27,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:29:27,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451952687] [2021-10-11 00:29:27,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:29:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:29:27,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:29:27,059 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2021-10-11 00:29:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:27,140 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-10-11 00:29:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:29:27,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 00:29:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:27,143 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:29:27,144 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 00:29:27,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:29:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 00:29:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-10-11 00:29:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:29:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-11 00:29:27,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2021-10-11 00:29:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:27,151 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-11 00:29:27,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:29:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-11 00:29:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 00:29:27,153 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:27,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:27,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:29:27,153 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2021-10-11 00:29:27,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:27,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089556978] [2021-10-11 00:29:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:29:27,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089556978] [2021-10-11 00:29:27,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443814358] [2021-10-11 00:29:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:29:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:29:27,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:29:27,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:27,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-11 00:29:27,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561327699] [2021-10-11 00:29:27,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:29:27,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:29:27,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:27,469 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2021-10-11 00:29:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:27,570 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-10-11 00:29:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:27,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-10-11 00:29:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:27,576 INFO L225 Difference]: With dead ends: 61 [2021-10-11 00:29:27,576 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 00:29:27,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 00:29:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-10-11 00:29:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:29:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-11 00:29:27,581 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2021-10-11 00:29:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:27,581 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-11 00:29:27,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:29:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-11 00:29:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 00:29:27,582 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:27,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:27,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:29:27,802 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 2 times [2021-10-11 00:29:27,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:27,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390506210] [2021-10-11 00:29:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:29:27,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390506210] [2021-10-11 00:29:27,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901501684] [2021-10-11 00:29:27,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:29:27,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:29:27,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:29:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:29:28,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:28,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-11 00:29:28,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748579105] [2021-10-11 00:29:28,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:29:28,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:28,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:29:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:28,017 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2021-10-11 00:29:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:28,129 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-10-11 00:29:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:29:28,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-10-11 00:29:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:28,132 INFO L225 Difference]: With dead ends: 73 [2021-10-11 00:29:28,132 INFO L226 Difference]: Without dead ends: 52 [2021-10-11 00:29:28,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-11 00:29:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2021-10-11 00:29:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:29:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-11 00:29:28,154 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 26 [2021-10-11 00:29:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:28,154 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-11 00:29:28,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:29:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-11 00:29:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:29:28,156 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:28,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:28,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:28,362 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash -381068522, now seen corresponding path program 3 times [2021-10-11 00:29:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:28,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543013747] [2021-10-11 00:29:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 00:29:28,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543013747] [2021-10-11 00:29:28,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325792971] [2021-10-11 00:29:28,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:29:28,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 00:29:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:29:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 00:29:28,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:28,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-11 00:29:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790082923] [2021-10-11 00:29:28,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:29:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:29:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:28,652 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2021-10-11 00:29:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:28,748 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-10-11 00:29:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:29:28,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-10-11 00:29:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:28,750 INFO L225 Difference]: With dead ends: 85 [2021-10-11 00:29:28,750 INFO L226 Difference]: Without dead ends: 62 [2021-10-11 00:29:28,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-11 00:29:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2021-10-11 00:29:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:29:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-11 00:29:28,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2021-10-11 00:29:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:28,757 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-11 00:29:28,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:29:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-11 00:29:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-11 00:29:28,758 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:28,758 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:28,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:28,974 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 4 times [2021-10-11 00:29:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:28,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487632944] [2021-10-11 00:29:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 00:29:29,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487632944] [2021-10-11 00:29:29,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32460068] [2021-10-11 00:29:29,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:29:29,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:29:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:29:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 00:29:29,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:29,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-11 00:29:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676847021] [2021-10-11 00:29:29,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:29:29,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:29:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:29:29,279 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2021-10-11 00:29:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:29,409 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-10-11 00:29:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:29:29,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2021-10-11 00:29:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:29,411 INFO L225 Difference]: With dead ends: 95 [2021-10-11 00:29:29,411 INFO L226 Difference]: Without dead ends: 70 [2021-10-11 00:29:29,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:29:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-11 00:29:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-10-11 00:29:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 00:29:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-11 00:29:29,418 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2021-10-11 00:29:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:29,418 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-11 00:29:29,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:29:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-11 00:29:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-11 00:29:29,420 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:29,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:29,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:29,625 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:29,625 INFO L82 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 5 times [2021-10-11 00:29:29,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:29,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245495700] [2021-10-11 00:29:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:29:29,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:29:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:29:29,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:29:29,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:29:29,749 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:29:29,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 00:29:29,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:29:29 BoogieIcfgContainer [2021-10-11 00:29:29,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:29:29,824 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:29:29,824 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:29:29,825 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:29:29,825 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:26" (3/4) ... [2021-10-11 00:29:29,828 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:29:29,829 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:29:29,837 INFO L168 Benchmark]: Toolchain (without parser) took 4028.28 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 69.5 MB in the beginning and 38.6 MB in the end (delta: 30.9 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:29,837 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 109.1 MB. Free memory was 85.9 MB in the beginning and 85.8 MB in the end (delta: 55.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:29:29,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.91 ms. Allocated memory is still 109.1 MB. Free memory was 69.2 MB in the beginning and 82.9 MB in the end (delta: -13.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:29,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.46 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 81.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:29:29,839 INFO L168 Benchmark]: Boogie Preprocessor took 29.06 ms. Allocated memory is still 109.1 MB. Free memory was 81.0 MB in the beginning and 79.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:29,840 INFO L168 Benchmark]: RCFGBuilder took 442.15 ms. Allocated memory is still 109.1 MB. Free memory was 79.5 MB in the beginning and 62.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:29,843 INFO L168 Benchmark]: TraceAbstraction took 3224.55 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 62.1 MB in the beginning and 38.6 MB in the end (delta: 23.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:29,843 INFO L168 Benchmark]: Witness Printer took 4.41 ms. Allocated memory is still 136.3 MB. Free memory is still 38.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:29:29,850 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 109.1 MB. Free memory was 85.9 MB in the beginning and 85.8 MB in the end (delta: 55.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.91 ms. Allocated memory is still 109.1 MB. Free memory was 69.2 MB in the beginning and 82.9 MB in the end (delta: -13.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.46 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 81.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.06 ms. Allocated memory is still 109.1 MB. Free memory was 81.0 MB in the beginning and 79.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 442.15 ms. Allocated memory is still 109.1 MB. Free memory was 79.5 MB in the beginning and 62.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3224.55 ms. Allocated memory was 109.1 MB in the beginning and 136.3 MB in the end (delta: 27.3 MB). Free memory was 62.1 MB in the beginning and 38.6 MB in the end (delta: 23.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.41 ms. Allocated memory is still 136.3 MB. Free memory is still 38.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC 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 -> 826ba3ecb74a591f4e23afc2c932e6d22d2291c8 [2021-10-11 00:29:33,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:29:33,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:29:33,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:29:33,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:29:33,254 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:29:33,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loops/string-2.i [2021-10-11 00:29:33,338 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/a2b8e3969/6d3796ab9bea4d1985a00fdfc28bb8d5/FLAG827feefc7 [2021-10-11 00:29:33,999 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:29:33,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/sv-benchmarks/c/loops/string-2.i [2021-10-11 00:29:34,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/a2b8e3969/6d3796ab9bea4d1985a00fdfc28bb8d5/FLAG827feefc7 [2021-10-11 00:29:34,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/data/a2b8e3969/6d3796ab9bea4d1985a00fdfc28bb8d5 [2021-10-11 00:29:34,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:29:34,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:29:34,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:29:34,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:29:34,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:29:34,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af82aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34, skipping insertion in model container [2021-10-11 00:29:34,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:29:34,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:29:34,626 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-11 00:29:34,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:29:34,733 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:29:34,766 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-11 00:29:34,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:29:34,798 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:29:34,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34 WrapperNode [2021-10-11 00:29:34,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:29:34,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:29:34,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:29:34,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:29:34,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:29:34,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:29:34,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:29:34,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:29:34,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... [2021-10-11 00:29:34,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:29:34,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:29:34,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:29:34,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:29:34,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:29:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-11 00:29:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 00:29:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:29:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:29:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:29:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-11 00:29:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:29:35,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:29:35,425 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 00:29:35,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:35 BoogieIcfgContainer [2021-10-11 00:29:35,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:29:35,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:29:35,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:29:35,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:29:35,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:29:34" (1/3) ... [2021-10-11 00:29:35,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186d923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:35, skipping insertion in model container [2021-10-11 00:29:35,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:34" (2/3) ... [2021-10-11 00:29:35,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186d923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:35, skipping insertion in model container [2021-10-11 00:29:35,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:35" (3/3) ... [2021-10-11 00:29:35,437 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2021-10-11 00:29:35,476 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:29:35,480 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:29:35,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:29:35,522 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:29:35,522 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:29:35,522 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:29:35,523 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:29:35,523 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:29:35,523 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:29:35,523 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:29:35,523 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:29:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-10-11 00:29:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:29:35,545 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:35,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:35,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-11 00:29:35,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:35,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808059710] [2021-10-11 00:29:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 00:29:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:35,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:29:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808059710] [2021-10-11 00:29:35,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:35,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:29:35,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741309555] [2021-10-11 00:29:35,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:29:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:35,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:29:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:29:35,847 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2021-10-11 00:29:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:35,872 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2021-10-11 00:29:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:29:35,874 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2021-10-11 00:29:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:35,884 INFO L225 Difference]: With dead ends: 48 [2021-10-11 00:29:35,884 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 00:29:35,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:29:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 00:29:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 00:29:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:29:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-11 00:29:35,928 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-10-11 00:29:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:35,928 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-11 00:29:35,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:29:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-11 00:29:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:29:35,930 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:35,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:36,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 00:29:36,142 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2021-10-11 00:29:36,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:36,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004221273] [2021-10-11 00:29:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:36,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:29:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:36,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:29:36,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004221273] [2021-10-11 00:29:36,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:36,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:29:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245458368] [2021-10-11 00:29:36,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:29:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:29:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:29:36,322 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2021-10-11 00:29:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:36,422 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-10-11 00:29:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:29:36,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 00:29:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:36,427 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:29:36,428 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 00:29:36,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:29:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 00:29:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-10-11 00:29:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:29:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-11 00:29:36,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2021-10-11 00:29:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:36,445 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-11 00:29:36,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:29:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-11 00:29:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 00:29:36,447 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:36,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:36,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 00:29:36,654 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:36,655 INFO L82 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2021-10-11 00:29:36,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:36,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506093241] [2021-10-11 00:29:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:36,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:29:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:29:36,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:29:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:29:36,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506093241] [2021-10-11 00:29:36,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:36,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-11 00:29:36,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927424196] [2021-10-11 00:29:36,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:29:36,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:29:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:36,854 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2021-10-11 00:29:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:37,193 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-10-11 00:29:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:29:37,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-10-11 00:29:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:37,197 INFO L225 Difference]: With dead ends: 79 [2021-10-11 00:29:37,197 INFO L226 Difference]: Without dead ends: 60 [2021-10-11 00:29:37,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-11 00:29:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2021-10-11 00:29:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:29:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-11 00:29:37,215 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2021-10-11 00:29:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:37,215 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-11 00:29:37,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:29:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-11 00:29:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-11 00:29:37,219 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:37,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:37,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 00:29:37,436 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 2 times [2021-10-11 00:29:37,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:37,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945740474] [2021-10-11 00:29:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:29:37,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 00:29:37,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:29:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-11 00:29:37,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945740474] [2021-10-11 00:29:37,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:37,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-11 00:29:37,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826966081] [2021-10-11 00:29:37,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 00:29:37,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:37,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 00:29:37,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:29:37,745 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 12 states. [2021-10-11 00:29:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:38,332 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2021-10-11 00:29:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:29:38,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2021-10-11 00:29:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:38,334 INFO L225 Difference]: With dead ends: 97 [2021-10-11 00:29:38,334 INFO L226 Difference]: Without dead ends: 72 [2021-10-11 00:29:38,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:29:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-11 00:29:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-10-11 00:29:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 00:29:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-11 00:29:38,343 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2021-10-11 00:29:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:38,343 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-11 00:29:38,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 00:29:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-11 00:29:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-11 00:29:38,344 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:38,345 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:38,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 00:29:38,550 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 3 times [2021-10-11 00:29:38,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:38,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977810756] [2021-10-11 00:29:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:29:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 00:29:38,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:29:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977810756] [2021-10-11 00:29:38,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:38,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:29:38,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201565864] [2021-10-11 00:29:38,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:29:38,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:38,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:29:38,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:38,803 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2021-10-11 00:29:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:38,889 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-10-11 00:29:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:29:38,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-10-11 00:29:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:38,892 INFO L225 Difference]: With dead ends: 52 [2021-10-11 00:29:38,892 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 00:29:38,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 00:29:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-11 00:29:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-11 00:29:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-11 00:29:38,899 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 38 [2021-10-11 00:29:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:38,900 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-11 00:29:38,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:29:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-11 00:29:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-11 00:29:38,901 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:38,902 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:39,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 00:29:39,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1782806673, now seen corresponding path program 1 times [2021-10-11 00:29:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:39,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283324021] [2021-10-11 00:29:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:29:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 00:29:39,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:29:39,359 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 2, 1] term [2021-10-11 00:29:39,359 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 00:29:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-11 00:29:39,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283324021] [2021-10-11 00:29:39,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:39,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-10-11 00:29:39,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890882471] [2021-10-11 00:29:39,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:29:39,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:29:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:29:39,508 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 4 states. [2021-10-11 00:29:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:39,705 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-10-11 00:29:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:39,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2021-10-11 00:29:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:39,707 INFO L225 Difference]: With dead ends: 47 [2021-10-11 00:29:39,707 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:29:39,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:29:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:29:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-11 00:29:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-11 00:29:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-11 00:29:39,713 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2021-10-11 00:29:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:39,714 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-11 00:29:39,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:29:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-11 00:29:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-11 00:29:39,715 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:39,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:39,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 00:29:39,927 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:39,928 INFO L82 PathProgramCache]: Analyzing trace with hash -364393356, now seen corresponding path program 1 times [2021-10-11 00:29:39,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:39,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646039881] [2021-10-11 00:29:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:29:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-11 00:29:40,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:29:40,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646039881] [2021-10-11 00:29:40,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:40,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:29:40,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178173091] [2021-10-11 00:29:40,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:29:40,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:29:40,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:29:40,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:40,110 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 4 states. [2021-10-11 00:29:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:40,146 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-10-11 00:29:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:40,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2021-10-11 00:29:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:40,148 INFO L225 Difference]: With dead ends: 58 [2021-10-11 00:29:40,148 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 00:29:40,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 00:29:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-11 00:29:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 00:29:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-11 00:29:40,155 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2021-10-11 00:29:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:40,155 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-11 00:29:40,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:29:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-11 00:29:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-11 00:29:40,157 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:40,157 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:40,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 00:29:40,366 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash -512239655, now seen corresponding path program 1 times [2021-10-11 00:29:40,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:29:40,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445772729] [2021-10-11 00:29:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 00:29:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:29:40,546 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:29:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:29:40,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:29:40,798 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-11 00:29:40,798 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:29:41,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 00:29:41,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:29:41 BoogieIcfgContainer [2021-10-11 00:29:41,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:29:41,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:29:41,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:29:41,065 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:29:41,065 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:35" (3/4) ... [2021-10-11 00:29:41,068 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:29:41,187 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc9d8a22-897c-4adf-b29b-0f1a74603eab/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:29:41,187 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:29:41,189 INFO L168 Benchmark]: Toolchain (without parser) took 6823.98 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 53.2 MB in the beginning and 27.6 MB in the end (delta: 25.6 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:41,190 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 71.3 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 55.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:29:41,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.32 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 52.8 MB in the end (delta: 280.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:41,191 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.78 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 51.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:41,211 INFO L168 Benchmark]: Boogie Preprocessor took 31.92 ms. Allocated memory is still 71.3 MB. Free memory was 51.0 MB in the beginning and 49.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:29:41,211 INFO L168 Benchmark]: RCFGBuilder took 548.87 ms. Allocated memory is still 71.3 MB. Free memory was 49.6 MB in the beginning and 32.1 MB in the end (delta: 17.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:41,212 INFO L168 Benchmark]: TraceAbstraction took 5634.59 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 31.6 MB in the beginning and 30.9 MB in the end (delta: 724.1 kB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:41,212 INFO L168 Benchmark]: Witness Printer took 122.77 ms. Allocated memory is still 96.5 MB. Free memory was 30.9 MB in the beginning and 27.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:41,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 71.3 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 55.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 434.32 ms. Allocated memory is still 71.3 MB. Free memory was 53.1 MB in the beginning and 52.8 MB in the end (delta: 280.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.78 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 51.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.92 ms. Allocated memory is still 71.3 MB. Free memory was 51.0 MB in the beginning and 49.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 548.87 ms. Allocated memory is still 71.3 MB. Free memory was 49.6 MB in the beginning and 32.1 MB in the end (delta: 17.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5634.59 ms. Allocated memory was 71.3 MB in the beginning and 96.5 MB in the end (delta: 25.2 MB). Free memory was 31.6 MB in the beginning and 30.9 MB in the end (delta: 724.1 kB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. * Witness Printer took 122.77 ms. Allocated memory is still 96.5 MB. Free memory was 30.9 MB in the beginning and 27.6 MB in the end (delta: 3.3 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: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND TRUE (inc_B-1)<