./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be --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 d4eaedc28ae5d992289c7a8b613ef86763e8650d77dc38c2182a834015324e1e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be --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 d4eaedc28ae5d992289c7a8b613ef86763e8650d77dc38c2182a834015324e1e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.1-dev-e943c26 [2021-10-21 20:17:37,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:17:37,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:17:37,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:17:37,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:17:38,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:17:38,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:17:38,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:17:38,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:17:38,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:17:38,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:17:38,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:17:38,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:17:38,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:17:38,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:17:38,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:17:38,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:17:38,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:17:38,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:17:38,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:17:38,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:17:38,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:17:38,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:17:38,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:17:38,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:17:38,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:17:38,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:17:38,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:17:38,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:17:38,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:17:38,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:17:38,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:17:38,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:17:38,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:17:38,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:17:38,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:17:38,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:17:38,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:17:38,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:17:38,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:17:38,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:17:38,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:17:38,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:17:38,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:17:38,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:17:38,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:17:38,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:17:38,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:17:38,135 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:17:38,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:17:38,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:17:38,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:17:38,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:17:38,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:17:38,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:17:38,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:17:38,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:17:38,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:17:38,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:17:38,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:17:38,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:17:38,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:17:38,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:17:38,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:17:38,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:17:38,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:17:38,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:17:38,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:17:38,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:17:38,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:17:38,141 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:17:38,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:17:38,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:17:38,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:17:38,143 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4eaedc28ae5d992289c7a8b613ef86763e8650d77dc38c2182a834015324e1e [2021-10-21 20:17:38,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:17:38,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:17:38,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:17:38,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:17:38,424 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:17:38,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-21 20:17:38,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/5169eefcb/f91d38a84435460d9551e2789aa20cce/FLAG8d64a6162 [2021-10-21 20:17:38,951 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:17:38,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-21 20:17:38,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/5169eefcb/f91d38a84435460d9551e2789aa20cce/FLAG8d64a6162 [2021-10-21 20:17:39,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/5169eefcb/f91d38a84435460d9551e2789aa20cce [2021-10-21 20:17:39,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:17:39,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:17:39,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:17:39,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:17:39,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:17:39,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439d8cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39, skipping insertion in model container [2021-10-21 20:17:39,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:17:39,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:17:39,554 WARN L228 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-21 20:17:39,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:17:39,599 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:17:39,611 WARN L228 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-21 20:17:39,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:17:39,648 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:17:39,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39 WrapperNode [2021-10-21 20:17:39,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:17:39,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:17:39,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:17:39,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:17:39,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:17:39,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:17:39,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:17:39,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:17:39,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:17:39,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:17:39,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:17:39,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:17:39,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (1/1) ... [2021-10-21 20:17:39,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:17:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:17:39,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:17:39,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:17:39,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:17:39,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:17:39,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:17:39,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:17:40,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:17:40,204 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-21 20:17:40,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:17:40 BoogieIcfgContainer [2021-10-21 20:17:40,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:17:40,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:17:40,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:17:40,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:17:40,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:17:39" (1/3) ... [2021-10-21 20:17:40,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a446a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:17:40, skipping insertion in model container [2021-10-21 20:17:40,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:17:39" (2/3) ... [2021-10-21 20:17:40,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a446a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:17:40, skipping insertion in model container [2021-10-21 20:17:40,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:17:40" (3/3) ... [2021-10-21 20:17:40,215 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-10-21 20:17:40,221 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:17:40,221 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:17:40,268 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:17:40,275 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:17:40,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:17:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:17:40,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:40,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:40,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-10-21 20:17:40,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:40,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281552303] [2021-10-21 20:17:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:40,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:17:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:40,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281552303] [2021-10-21 20:17:40,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281552303] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:40,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:40,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 20:17:40,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538367571] [2021-10-21 20:17:40,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:17:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:17:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:17:40,533 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:40,557 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-10-21 20:17:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:17:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 20:17:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:40,567 INFO L225 Difference]: With dead ends: 57 [2021-10-21 20:17:40,567 INFO L226 Difference]: Without dead ends: 38 [2021-10-21 20:17:40,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:17:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-21 20:17:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-21 20:17:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-10-21 20:17:40,614 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-10-21 20:17:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:40,617 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-10-21 20:17:40,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-10-21 20:17:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:17:40,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:40,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:40,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:17:40,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-10-21 20:17:40,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:40,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484189560] [2021-10-21 20:17:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:40,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:17:40,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:40,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484189560] [2021-10-21 20:17:40,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484189560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:40,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:40,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:17:40,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147657792] [2021-10-21 20:17:40,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:17:40,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:17:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:17:40,762 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:40,916 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-10-21 20:17:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:17:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 20:17:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:40,918 INFO L225 Difference]: With dead ends: 89 [2021-10-21 20:17:40,919 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 20:17:40,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:17:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 20:17:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-10-21 20:17:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-10-21 20:17:40,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-10-21 20:17:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:40,930 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-10-21 20:17:40,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-10-21 20:17:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:17:40,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:40,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:40,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:17:40,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:40,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-10-21 20:17:40,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:40,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773427651] [2021-10-21 20:17:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:40,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:17:41,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:41,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773427651] [2021-10-21 20:17:41,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773427651] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:41,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:41,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:17:41,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059915336] [2021-10-21 20:17:41,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:17:41,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:17:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:17:41,085 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:41,384 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-10-21 20:17:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:17:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 20:17:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:41,391 INFO L225 Difference]: With dead ends: 143 [2021-10-21 20:17:41,391 INFO L226 Difference]: Without dead ends: 105 [2021-10-21 20:17:41,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:17:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-21 20:17:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-10-21 20:17:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-10-21 20:17:41,405 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-10-21 20:17:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:41,405 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-10-21 20:17:41,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-10-21 20:17:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:17:41,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:41,407 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:41,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:17:41,408 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-10-21 20:17:41,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:41,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962973445] [2021-10-21 20:17:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:41,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:17:41,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:41,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962973445] [2021-10-21 20:17:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962973445] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:41,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:41,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:17:41,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463190106] [2021-10-21 20:17:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:17:41,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:17:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:17:41,567 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:41,798 INFO L93 Difference]: Finished difference Result 169 states and 250 transitions. [2021-10-21 20:17:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:17:41,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 20:17:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:41,802 INFO L225 Difference]: With dead ends: 169 [2021-10-21 20:17:41,803 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 20:17:41,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:17:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 20:17:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-10-21 20:17:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2021-10-21 20:17:41,822 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2021-10-21 20:17:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2021-10-21 20:17:41,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2021-10-21 20:17:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:17:41,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:41,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:41,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:17:41,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:41,832 INFO L82 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2021-10-21 20:17:41,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:41,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168805083] [2021-10-21 20:17:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:41,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:17:41,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:41,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168805083] [2021-10-21 20:17:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168805083] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:17:41,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309835052] [2021-10-21 20:17:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:41,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:17:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:17:41,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:17:41,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:17:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:42,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:17:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:17:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:17:42,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309835052] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:42,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:17:42,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-10-21 20:17:42,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944672331] [2021-10-21 20:17:42,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:17:42,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:17:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:17:42,285 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:42,479 INFO L93 Difference]: Finished difference Result 146 states and 237 transitions. [2021-10-21 20:17:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:17:42,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 20:17:42,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:42,481 INFO L225 Difference]: With dead ends: 146 [2021-10-21 20:17:42,481 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 20:17:42,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:17:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 20:17:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-10-21 20:17:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.393939393939394) internal successors, (138), 99 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2021-10-21 20:17:42,498 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2021-10-21 20:17:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:42,499 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2021-10-21 20:17:42,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2021-10-21 20:17:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:17:42,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:42,500 INFO L512 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] [2021-10-21 20:17:42,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:17:42,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:17:42,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1606169286, now seen corresponding path program 1 times [2021-10-21 20:17:42,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:42,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361977918] [2021-10-21 20:17:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:42,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:17:42,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:42,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361977918] [2021-10-21 20:17:42,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361977918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:17:42,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471939478] [2021-10-21 20:17:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:42,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:17:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:17:42,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:17:42,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:17:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:42,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:17:42,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:17:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 20:17:43,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471939478] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:43,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:17:43,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-10-21 20:17:43,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307325016] [2021-10-21 20:17:43,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:17:43,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:43,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:17:43,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:17:43,089 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:56,333 INFO L93 Difference]: Finished difference Result 212 states and 313 transitions. [2021-10-21 20:17:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:17:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 20:17:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:56,334 INFO L225 Difference]: With dead ends: 212 [2021-10-21 20:17:56,334 INFO L226 Difference]: Without dead ends: 145 [2021-10-21 20:17:56,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:17:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-21 20:17:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2021-10-21 20:17:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 122 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 165 transitions. [2021-10-21 20:17:56,342 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 165 transitions. Word has length 26 [2021-10-21 20:17:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:56,342 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 165 transitions. [2021-10-21 20:17:56,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 165 transitions. [2021-10-21 20:17:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:17:56,343 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:56,343 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:56,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:17:56,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:17:56,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 23363195, now seen corresponding path program 1 times [2021-10-21 20:17:56,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:56,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018659700] [2021-10-21 20:17:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:56,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:17:56,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:56,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018659700] [2021-10-21 20:17:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018659700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:17:56,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541654759] [2021-10-21 20:17:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:56,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:17:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:17:56,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:17:56,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:17:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:17:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:17:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:17:56,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541654759] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:56,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:17:56,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-10-21 20:17:56,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534348680] [2021-10-21 20:17:56,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:17:56,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:17:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:17:56,962 INFO L87 Difference]: Start difference. First operand 123 states and 165 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:57,316 INFO L93 Difference]: Finished difference Result 258 states and 365 transitions. [2021-10-21 20:17:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:17:57,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 20:17:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:57,318 INFO L225 Difference]: With dead ends: 258 [2021-10-21 20:17:57,318 INFO L226 Difference]: Without dead ends: 168 [2021-10-21 20:17:57,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:17:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-21 20:17:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2021-10-21 20:17:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 145 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-10-21 20:17:57,330 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 32 [2021-10-21 20:17:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:57,331 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-10-21 20:17:57,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-10-21 20:17:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 20:17:57,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:57,333 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:57,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:17:57,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 20:17:57,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash 86397356, now seen corresponding path program 1 times [2021-10-21 20:17:57,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:57,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583549545] [2021-10-21 20:17:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:57,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 20:17:57,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:57,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583549545] [2021-10-21 20:17:57,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583549545] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:57,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:57,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:17:57,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529005575] [2021-10-21 20:17:57,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:17:57,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:57,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:17:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:17:57,707 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:58,141 INFO L93 Difference]: Finished difference Result 538 states and 696 transitions. [2021-10-21 20:17:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:17:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-21 20:17:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:58,144 INFO L225 Difference]: With dead ends: 538 [2021-10-21 20:17:58,145 INFO L226 Difference]: Without dead ends: 422 [2021-10-21 20:17:58,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:17:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-10-21 20:17:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 146. [2021-10-21 20:17:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 145 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-10-21 20:17:58,159 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 38 [2021-10-21 20:17:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:58,160 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-10-21 20:17:58,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-10-21 20:17:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:17:58,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:58,162 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:58,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 20:17:58,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash -345904797, now seen corresponding path program 1 times [2021-10-21 20:17:58,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:58,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736499708] [2021-10-21 20:17:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:58,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 20:17:58,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:58,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736499708] [2021-10-21 20:17:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736499708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:58,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:58,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:17:58,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944668936] [2021-10-21 20:17:58,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:17:58,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:17:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:17:58,253 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:58,666 INFO L93 Difference]: Finished difference Result 518 states and 671 transitions. [2021-10-21 20:17:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:17:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-21 20:17:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:58,669 INFO L225 Difference]: With dead ends: 518 [2021-10-21 20:17:58,669 INFO L226 Difference]: Without dead ends: 403 [2021-10-21 20:17:58,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:17:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-21 20:17:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 146. [2021-10-21 20:17:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 145 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-10-21 20:17:58,681 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 39 [2021-10-21 20:17:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:58,682 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-10-21 20:17:58,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-10-21 20:17:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 20:17:58,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:58,683 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:58,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:17:58,684 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash 190859729, now seen corresponding path program 1 times [2021-10-21 20:17:58,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:58,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815470187] [2021-10-21 20:17:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:58,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 20:17:58,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:58,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815470187] [2021-10-21 20:17:58,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815470187] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:58,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:58,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:17:58,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381648447] [2021-10-21 20:17:58,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:17:58,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:58,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:17:58,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:17:58,807 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:17:59,494 INFO L93 Difference]: Finished difference Result 652 states and 841 transitions. [2021-10-21 20:17:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:17:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 20:17:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:17:59,497 INFO L225 Difference]: With dead ends: 652 [2021-10-21 20:17:59,497 INFO L226 Difference]: Without dead ends: 537 [2021-10-21 20:17:59,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:17:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-10-21 20:17:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 146. [2021-10-21 20:17:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 145 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2021-10-21 20:17:59,508 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 40 [2021-10-21 20:17:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:17:59,508 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2021-10-21 20:17:59,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:17:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2021-10-21 20:17:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 20:17:59,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:17:59,510 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:17:59,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:17:59,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:17:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:17:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -83899885, now seen corresponding path program 1 times [2021-10-21 20:17:59,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:17:59,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84499405] [2021-10-21 20:17:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:17:59,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:17:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:17:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 20:17:59,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:17:59,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84499405] [2021-10-21 20:17:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84499405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:17:59,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:17:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:17:59,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261708098] [2021-10-21 20:17:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:17:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:17:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:17:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:17:59,681 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:00,392 INFO L93 Difference]: Finished difference Result 693 states and 892 transitions. [2021-10-21 20:18:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:18:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 20:18:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:00,396 INFO L225 Difference]: With dead ends: 693 [2021-10-21 20:18:00,396 INFO L226 Difference]: Without dead ends: 577 [2021-10-21 20:18:00,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:18:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-10-21 20:18:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 134. [2021-10-21 20:18:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.3082706766917294) internal successors, (174), 133 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2021-10-21 20:18:00,407 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 40 [2021-10-21 20:18:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:00,408 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2021-10-21 20:18:00,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:00,408 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2021-10-21 20:18:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 20:18:00,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:00,409 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:00,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 20:18:00,410 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash -565879240, now seen corresponding path program 1 times [2021-10-21 20:18:00,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:00,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547348780] [2021-10-21 20:18:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:00,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 20:18:00,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:00,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547348780] [2021-10-21 20:18:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547348780] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:00,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:00,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:18:00,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277932742] [2021-10-21 20:18:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:18:00,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:18:00,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:18:00,450 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:00,465 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2021-10-21 20:18:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:18:00,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-21 20:18:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:00,467 INFO L225 Difference]: With dead ends: 194 [2021-10-21 20:18:00,467 INFO L226 Difference]: Without dead ends: 162 [2021-10-21 20:18:00,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:18:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-21 20:18:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-10-21 20:18:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.279503105590062) internal successors, (206), 161 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2021-10-21 20:18:00,477 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 45 [2021-10-21 20:18:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:00,478 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2021-10-21 20:18:00,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2021-10-21 20:18:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 20:18:00,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:00,479 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:00,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:18:00,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:00,480 INFO L82 PathProgramCache]: Analyzing trace with hash -543246986, now seen corresponding path program 1 times [2021-10-21 20:18:00,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:00,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991441760] [2021-10-21 20:18:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:00,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:18:00,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:00,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991441760] [2021-10-21 20:18:00,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991441760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:00,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505836670] [2021-10-21 20:18:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:00,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:00,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:18:00,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:18:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:18:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:18:01,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505836670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:01,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:01,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-10-21 20:18:01,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985917320] [2021-10-21 20:18:01,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:18:01,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:18:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:01,069 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:01,320 INFO L93 Difference]: Finished difference Result 486 states and 625 transitions. [2021-10-21 20:18:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:18:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-21 20:18:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:01,323 INFO L225 Difference]: With dead ends: 486 [2021-10-21 20:18:01,323 INFO L226 Difference]: Without dead ends: 309 [2021-10-21 20:18:01,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:18:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-10-21 20:18:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 284. [2021-10-21 20:18:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.2756183745583038) internal successors, (361), 283 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 361 transitions. [2021-10-21 20:18:01,339 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 361 transitions. Word has length 45 [2021-10-21 20:18:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:01,339 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 361 transitions. [2021-10-21 20:18:01,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 361 transitions. [2021-10-21 20:18:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 20:18:01,341 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:01,341 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:01,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:01,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 20:18:01,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:01,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1776534260, now seen corresponding path program 1 times [2021-10-21 20:18:01,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:01,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832541944] [2021-10-21 20:18:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:01,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:18:01,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:01,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832541944] [2021-10-21 20:18:01,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832541944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:01,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891798291] [2021-10-21 20:18:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:01,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:01,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:18:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:18:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:01,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:18:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 20:18:02,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891798291] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:02,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:02,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-10-21 20:18:02,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388470289] [2021-10-21 20:18:02,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:18:02,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:18:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:18:02,096 INFO L87 Difference]: Start difference. First operand 284 states and 361 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:02,484 INFO L93 Difference]: Finished difference Result 1277 states and 1620 transitions. [2021-10-21 20:18:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:18:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 20:18:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:02,490 INFO L225 Difference]: With dead ends: 1277 [2021-10-21 20:18:02,490 INFO L226 Difference]: Without dead ends: 1023 [2021-10-21 20:18:02,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:18:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-10-21 20:18:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 462. [2021-10-21 20:18:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.2711496746203905) internal successors, (586), 461 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 586 transitions. [2021-10-21 20:18:02,524 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 586 transitions. Word has length 46 [2021-10-21 20:18:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:02,525 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 586 transitions. [2021-10-21 20:18:02,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 586 transitions. [2021-10-21 20:18:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 20:18:02,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:02,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:02,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:02,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 20:18:02,752 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1701631379, now seen corresponding path program 1 times [2021-10-21 20:18:02,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:02,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010409316] [2021-10-21 20:18:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:02,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:18:02,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:02,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010409316] [2021-10-21 20:18:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010409316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:02,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98837912] [2021-10-21 20:18:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:02,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:02,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:18:02,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:18:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:03,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:18:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:18:03,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98837912] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:03,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:03,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-10-21 20:18:03,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55010414] [2021-10-21 20:18:03,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:18:03,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:18:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:03,283 INFO L87 Difference]: Start difference. First operand 462 states and 586 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:03,442 INFO L93 Difference]: Finished difference Result 1022 states and 1305 transitions. [2021-10-21 20:18:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:18:03,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-21 20:18:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:03,446 INFO L225 Difference]: With dead ends: 1022 [2021-10-21 20:18:03,447 INFO L226 Difference]: Without dead ends: 730 [2021-10-21 20:18:03,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-10-21 20:18:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 675. [2021-10-21 20:18:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.2655786350148368) internal successors, (853), 674 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 853 transitions. [2021-10-21 20:18:03,481 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 853 transitions. Word has length 48 [2021-10-21 20:18:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:03,481 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 853 transitions. [2021-10-21 20:18:03,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 853 transitions. [2021-10-21 20:18:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 20:18:03,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:03,483 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:03,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:03,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 20:18:03,700 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1042781594, now seen corresponding path program 1 times [2021-10-21 20:18:03,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:03,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789218062] [2021-10-21 20:18:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:03,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:18:03,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:03,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789218062] [2021-10-21 20:18:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789218062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:03,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325777160] [2021-10-21 20:18:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:03,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:03,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:18:03,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:18:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:04,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:18:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:18:04,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325777160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:04,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:04,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-10-21 20:18:04,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841474879] [2021-10-21 20:18:04,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:04,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:18:04,600 INFO L87 Difference]: Start difference. First operand 675 states and 853 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:05,115 INFO L93 Difference]: Finished difference Result 1916 states and 2488 transitions. [2021-10-21 20:18:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:18:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-21 20:18:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:05,123 INFO L225 Difference]: With dead ends: 1916 [2021-10-21 20:18:05,123 INFO L226 Difference]: Without dead ends: 1224 [2021-10-21 20:18:05,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:18:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-10-21 20:18:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1065. [2021-10-21 20:18:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 1.2575187969924813) internal successors, (1338), 1064 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1338 transitions. [2021-10-21 20:18:05,197 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1338 transitions. Word has length 49 [2021-10-21 20:18:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:05,197 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1338 transitions. [2021-10-21 20:18:05,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1338 transitions. [2021-10-21 20:18:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 20:18:05,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:05,199 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:05,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:05,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:05,419 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:05,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2126140849, now seen corresponding path program 1 times [2021-10-21 20:18:05,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:05,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755766128] [2021-10-21 20:18:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:05,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:18:05,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:05,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755766128] [2021-10-21 20:18:05,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755766128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:05,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514746328] [2021-10-21 20:18:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:05,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:05,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:18:05,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:18:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:05,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:18:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:18:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514746328] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:06,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:06,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-10-21 20:18:06,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085426356] [2021-10-21 20:18:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:06,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:18:06,376 INFO L87 Difference]: Start difference. First operand 1065 states and 1338 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:06,969 INFO L93 Difference]: Finished difference Result 2044 states and 2588 transitions. [2021-10-21 20:18:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:18:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-21 20:18:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:06,978 INFO L225 Difference]: With dead ends: 2044 [2021-10-21 20:18:06,978 INFO L226 Difference]: Without dead ends: 1626 [2021-10-21 20:18:06,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:18:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-10-21 20:18:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1406. [2021-10-21 20:18:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 1.2555160142348754) internal successors, (1764), 1405 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 1764 transitions. [2021-10-21 20:18:07,043 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 1764 transitions. Word has length 50 [2021-10-21 20:18:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 1764 transitions. [2021-10-21 20:18:07,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 1764 transitions. [2021-10-21 20:18:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 20:18:07,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:07,046 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:07,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:07,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:07,260 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash 48257313, now seen corresponding path program 1 times [2021-10-21 20:18:07,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:07,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252505653] [2021-10-21 20:18:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:07,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:18:07,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:18:07,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252505653] [2021-10-21 20:18:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252505653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:07,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505786848] [2021-10-21 20:18:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:07,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:07,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:07,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:18:07,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:18:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:18:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:18:10,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505786848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:10,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:10,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2021-10-21 20:18:10,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184319310] [2021-10-21 20:18:10,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:18:10,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:18:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:18:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:18:10,267 INFO L87 Difference]: Start difference. First operand 1406 states and 1764 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:11,187 INFO L93 Difference]: Finished difference Result 2041 states and 2573 transitions. [2021-10-21 20:18:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:18:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-21 20:18:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:11,197 INFO L225 Difference]: With dead ends: 2041 [2021-10-21 20:18:11,197 INFO L226 Difference]: Without dead ends: 1645 [2021-10-21 20:18:11,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:18:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-10-21 20:18:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1390. [2021-10-21 20:18:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 1.2512598992080635) internal successors, (1738), 1389 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1738 transitions. [2021-10-21 20:18:11,264 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1738 transitions. Word has length 51 [2021-10-21 20:18:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:11,265 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1738 transitions. [2021-10-21 20:18:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1738 transitions. [2021-10-21 20:18:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 20:18:11,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:11,267 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:11,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:11,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:18:11,481 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-10-21 20:18:11,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:18:11,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102626431] [2021-10-21 20:18:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:11,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:18:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:18:11,500 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:18:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:18:11,558 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:18:11,558 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:18:11,560 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:18:11,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 20:18:11,568 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:18:11,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:18:11 BoogieIcfgContainer [2021-10-21 20:18:11,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:18:11,626 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:18:11,626 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:18:11,627 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:18:11,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:17:40" (3/4) ... [2021-10-21 20:18:11,630 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:18:11,630 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:18:11,632 INFO L168 Benchmark]: Toolchain (without parser) took 32286.05 ms. Allocated memory was 115.3 MB in the beginning and 151.0 MB in the end (delta: 35.7 MB). Free memory was 85.8 MB in the beginning and 63.6 MB in the end (delta: 22.1 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:11,632 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 115.3 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:18:11,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.88 ms. Allocated memory is still 115.3 MB. Free memory was 85.8 MB in the beginning and 87.0 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:11,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.86 ms. Allocated memory is still 115.3 MB. Free memory was 87.0 MB in the beginning and 85.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:11,634 INFO L168 Benchmark]: Boogie Preprocessor took 28.46 ms. Allocated memory is still 115.3 MB. Free memory was 85.2 MB in the beginning and 83.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:11,634 INFO L168 Benchmark]: RCFGBuilder took 485.30 ms. Allocated memory is still 115.3 MB. Free memory was 83.8 MB in the beginning and 71.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:11,634 INFO L168 Benchmark]: TraceAbstraction took 31417.60 ms. Allocated memory was 115.3 MB in the beginning and 151.0 MB in the end (delta: 35.7 MB). Free memory was 70.9 MB in the beginning and 63.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 44.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:11,635 INFO L168 Benchmark]: Witness Printer took 4.09 ms. Allocated memory is still 151.0 MB. Free memory is still 63.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:18:11,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 115.3 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.88 ms. Allocated memory is still 115.3 MB. Free memory was 85.8 MB in the beginning and 87.0 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.86 ms. Allocated memory is still 115.3 MB. Free memory was 87.0 MB in the beginning and 85.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.46 ms. Allocated memory is still 115.3 MB. Free memory was 85.2 MB in the beginning and 83.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 485.30 ms. Allocated memory is still 115.3 MB. Free memory was 83.8 MB in the beginning and 71.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31417.60 ms. Allocated memory was 115.3 MB in the beginning and 151.0 MB in the end (delta: 35.7 MB). Free memory was 70.9 MB in the beginning and 63.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 44.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.09 ms. Allocated memory is still 151.0 MB. Free memory is still 63.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 108. Possible FailurePath: [L116] unsigned int a, b, r; [L118] a = __VERIFIER_nondet_uint() [L119] b = __VERIFIER_nondet_uint() [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND TRUE a3 == (unsigned char)0 [L52] na = na - 1 [L53] COND TRUE a2 == (unsigned char)0 [L54] na = na - 1 [L55] COND TRUE a1 == (unsigned char)0 [L56] na = na - 1 [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND TRUE b1 == (unsigned char)0 [L66] nb = nb - 1 [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND FALSE !(partial_sum > ((unsigned char)254)) [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND TRUE i == (unsigned char)1 [L101] r1 = (unsigned char)0 [L102] COND FALSE !(i == (unsigned char)2) [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND TRUE i == (unsigned char)2 [L102] r2 = (unsigned char)0 [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND FALSE !(i == (unsigned char)2) [L103] COND TRUE i == (unsigned char)3 [L103] r3 = (unsigned char)0 [L105] i = i + (unsigned char)1 [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L121] r = mp_add(a, b) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31300.3ms, OverallIterations: 19, TraceHistogramMax: 4, EmptinessCheckTime: 36.1ms, AutomataDifference: 19736.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1618 SDtfs, 2077 SDslu, 2929 SDs, 0 SdLazy, 3758 SolverSat, 245 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 17334.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 500 GetRequests, 377 SyntacticMatches, 25 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1351.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1406occurred in iteration=17, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 436.3ms AutomataMinimizationTime, 18 MinimizatonAttempts, 2792 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 108.9ms SsaConstructionTime, 914.1ms SatisfiabilityAnalysisTime, 6933.8ms InterpolantComputationTime, 1048 NumberOfCodeBlocks, 1048 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 970 ConstructedInterpolants, 22 QuantifiedInterpolants, 6265 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1219 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 27 InterpolantComputations, 18 PerfectInterpolantSequences, 472/508 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 20:18:11,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:18:14,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:18:14,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:18:14,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:18:14,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:18:14,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:18:14,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:18:14,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:18:14,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:18:14,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:18:14,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:18:14,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:18:14,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:18:14,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:18:14,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:18:14,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:18:14,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:18:14,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:18:14,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:18:14,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:18:14,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:18:14,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:18:14,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:18:14,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:18:14,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:18:14,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:18:14,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:18:14,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:18:14,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:18:14,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:18:14,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:18:14,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:18:14,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:18:14,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:18:14,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:18:14,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:18:14,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:18:14,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:18:14,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:18:14,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:18:14,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:18:14,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 20:18:14,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:18:14,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:18:14,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:18:14,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:18:14,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:18:14,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:18:14,291 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:18:14,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:18:14,291 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:18:14,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:18:14,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:18:14,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:18:14,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:18:14,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:18:14,293 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 20:18:14,293 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 20:18:14,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:18:14,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:18:14,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:18:14,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:18:14,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:18:14,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:18:14,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:18:14,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:18:14,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:18:14,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:18:14,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:18:14,296 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 20:18:14,296 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 20:18:14,296 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:18:14,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:18:14,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:18:14,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:18:14,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 20:18:14,298 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4eaedc28ae5d992289c7a8b613ef86763e8650d77dc38c2182a834015324e1e [2021-10-21 20:18:14,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:18:14,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:18:14,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:18:14,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:18:14,764 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:18:14,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-21 20:18:14,845 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/7c01677ba/7999dcdb289f421ab9e8339eba6c4aca/FLAG82c85d858 [2021-10-21 20:18:15,429 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:18:15,431 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/sv-benchmarks/c/bitvector/byte_add-1.i [2021-10-21 20:18:15,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/7c01677ba/7999dcdb289f421ab9e8339eba6c4aca/FLAG82c85d858 [2021-10-21 20:18:15,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/data/7c01677ba/7999dcdb289f421ab9e8339eba6c4aca [2021-10-21 20:18:15,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:18:15,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:18:15,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:18:15,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:18:15,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:18:15,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:18:15" (1/1) ... [2021-10-21 20:18:15,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12cf172a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:15, skipping insertion in model container [2021-10-21 20:18:15,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:18:15" (1/1) ... [2021-10-21 20:18:15,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:18:15,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:18:15,992 WARN L228 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-21 20:18:16,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:18:16,098 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:18:16,124 WARN L228 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_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/sv-benchmarks/c/bitvector/byte_add-1.i[861,874] [2021-10-21 20:18:16,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:18:16,190 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:18:16,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16 WrapperNode [2021-10-21 20:18:16,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:18:16,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:18:16,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:18:16,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:18:16,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:18:16,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:18:16,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:18:16,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:18:16,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:18:16,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:18:16,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:18:16,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:18:16,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (1/1) ... [2021-10-21 20:18:16,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:18:16,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:18:16,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:18:16,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:18:16,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 20:18:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:18:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:18:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:18:16,916 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:18:16,916 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-21 20:18:16,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:18:16 BoogieIcfgContainer [2021-10-21 20:18:16,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:18:16,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:18:16,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:18:16,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:18:16,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:18:15" (1/3) ... [2021-10-21 20:18:16,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0d9adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:18:16, skipping insertion in model container [2021-10-21 20:18:16,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:18:16" (2/3) ... [2021-10-21 20:18:16,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0d9adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:18:16, skipping insertion in model container [2021-10-21 20:18:16,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:18:16" (3/3) ... [2021-10-21 20:18:16,927 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-10-21 20:18:16,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:18:16,933 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:18:16,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:18:17,005 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:18:17,005 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:18:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:18:17,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:17,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:17,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-10-21 20:18:17,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:17,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722862761] [2021-10-21 20:18:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:17,055 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:17,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:17,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:17,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 20:18:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 20:18:17,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:17,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:17,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:17,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722862761] [2021-10-21 20:18:17,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722862761] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:17,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:17,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 20:18:17,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307424750] [2021-10-21 20:18:17,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:18:17,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:18:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:18:17,321 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:17,338 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-10-21 20:18:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:18:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 20:18:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:17,349 INFO L225 Difference]: With dead ends: 57 [2021-10-21 20:18:17,349 INFO L226 Difference]: Without dead ends: 38 [2021-10-21 20:18:17,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:18:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-21 20:18:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-21 20:18:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-10-21 20:18:17,408 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-10-21 20:18:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:17,409 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-10-21 20:18:17,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-10-21 20:18:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:18:17,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:17,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:17,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:17,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:17,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-10-21 20:18:17,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:17,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120129547] [2021-10-21 20:18:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:17,630 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:17,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:17,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 20:18:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:17,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:18:17,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:17,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:17,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:17,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120129547] [2021-10-21 20:18:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120129547] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:17,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:17,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:18:17,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934803960] [2021-10-21 20:18:17,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:17,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:17,937 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:18,309 INFO L93 Difference]: Finished difference Result 180 states and 315 transitions. [2021-10-21 20:18:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:18:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 20:18:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:18,312 INFO L225 Difference]: With dead ends: 180 [2021-10-21 20:18:18,312 INFO L226 Difference]: Without dead ends: 152 [2021-10-21 20:18:18,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-21 20:18:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2021-10-21 20:18:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 96 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 152 transitions. [2021-10-21 20:18:18,329 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 152 transitions. Word has length 12 [2021-10-21 20:18:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:18,330 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 152 transitions. [2021-10-21 20:18:18,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 152 transitions. [2021-10-21 20:18:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:18:18,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:18,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:18,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:18,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:18,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1251593412, now seen corresponding path program 1 times [2021-10-21 20:18:18,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:18,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511402661] [2021-10-21 20:18:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:18,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:18,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:18,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 20:18:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:18:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:18,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:18,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:18,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511402661] [2021-10-21 20:18:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511402661] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:18,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:18,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-21 20:18:18,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630500914] [2021-10-21 20:18:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:18:18,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:18:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:18:18,803 INFO L87 Difference]: Start difference. First operand 97 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:19,465 INFO L93 Difference]: Finished difference Result 251 states and 421 transitions. [2021-10-21 20:18:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:18:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-21 20:18:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:19,469 INFO L225 Difference]: With dead ends: 251 [2021-10-21 20:18:19,469 INFO L226 Difference]: Without dead ends: 223 [2021-10-21 20:18:19,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:18:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-21 20:18:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-10-21 20:18:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5947368421052632) internal successors, (303), 190 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 303 transitions. [2021-10-21 20:18:19,511 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 303 transitions. Word has length 14 [2021-10-21 20:18:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:19,512 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 303 transitions. [2021-10-21 20:18:19,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 303 transitions. [2021-10-21 20:18:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:18:19,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:19,518 INFO L512 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, 1, 1, 1, 1] [2021-10-21 20:18:19,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:19,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:19,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2087887882, now seen corresponding path program 1 times [2021-10-21 20:18:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:19,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135347485] [2021-10-21 20:18:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:19,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:19,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:19,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 20:18:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:18:19,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:19,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:20,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:20,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135347485] [2021-10-21 20:18:20,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135347485] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:20,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:20,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:18:20,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450827170] [2021-10-21 20:18:20,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:18:20,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:18:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:18:20,011 INFO L87 Difference]: Start difference. First operand 191 states and 303 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:20,149 INFO L93 Difference]: Finished difference Result 449 states and 722 transitions. [2021-10-21 20:18:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:18:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 20:18:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:20,152 INFO L225 Difference]: With dead ends: 449 [2021-10-21 20:18:20,153 INFO L226 Difference]: Without dead ends: 292 [2021-10-21 20:18:20,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:18:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-21 20:18:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 257. [2021-10-21 20:18:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.55078125) internal successors, (397), 256 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 397 transitions. [2021-10-21 20:18:20,172 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 397 transitions. Word has length 26 [2021-10-21 20:18:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:20,173 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 397 transitions. [2021-10-21 20:18:20,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 397 transitions. [2021-10-21 20:18:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:18:20,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:20,176 INFO L512 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, 1, 1, 1, 1] [2021-10-21 20:18:20,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:20,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:20,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash 73987210, now seen corresponding path program 1 times [2021-10-21 20:18:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:20,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685140257] [2021-10-21 20:18:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:20,389 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:20,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:20,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 20:18:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:20,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:18:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:20,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:20,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:20,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685140257] [2021-10-21 20:18:20,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685140257] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:20,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:20,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:18:20,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349225384] [2021-10-21 20:18:20,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:20,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:20,675 INFO L87 Difference]: Start difference. First operand 257 states and 397 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:20,977 INFO L93 Difference]: Finished difference Result 1005 states and 1558 transitions. [2021-10-21 20:18:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:18:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 20:18:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:20,983 INFO L225 Difference]: With dead ends: 1005 [2021-10-21 20:18:20,983 INFO L226 Difference]: Without dead ends: 784 [2021-10-21 20:18:20,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-21 20:18:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 636. [2021-10-21 20:18:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5181102362204724) internal successors, (964), 635 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 964 transitions. [2021-10-21 20:18:21,014 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 964 transitions. Word has length 26 [2021-10-21 20:18:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:21,014 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 964 transitions. [2021-10-21 20:18:21,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 964 transitions. [2021-10-21 20:18:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:18:21,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:21,017 INFO L512 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, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:21,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:21,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:21,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1742793183, now seen corresponding path program 1 times [2021-10-21 20:18:21,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:21,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55274187] [2021-10-21 20:18:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:21,230 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:21,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:21,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:21,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 20:18:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:18:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:21,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:21,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:21,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55274187] [2021-10-21 20:18:21,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55274187] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:21,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:21,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-21 20:18:21,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599702451] [2021-10-21 20:18:21,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:18:21,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:21,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:18:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:18:21,719 INFO L87 Difference]: Start difference. First operand 636 states and 964 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:22,729 INFO L93 Difference]: Finished difference Result 2019 states and 3076 transitions. [2021-10-21 20:18:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 20:18:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 20:18:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:22,738 INFO L225 Difference]: With dead ends: 2019 [2021-10-21 20:18:22,738 INFO L226 Difference]: Without dead ends: 1433 [2021-10-21 20:18:22,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-10-21 20:18:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-10-21 20:18:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 851. [2021-10-21 20:18:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4388235294117646) internal successors, (1223), 850 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1223 transitions. [2021-10-21 20:18:22,803 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1223 transitions. Word has length 28 [2021-10-21 20:18:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:22,804 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1223 transitions. [2021-10-21 20:18:22,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1223 transitions. [2021-10-21 20:18:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 20:18:22,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:22,806 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:22,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:23,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:23,017 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2075339537, now seen corresponding path program 1 times [2021-10-21 20:18:23,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:23,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280902640] [2021-10-21 20:18:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:23,019 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:23,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:23,020 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:23,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 20:18:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:18:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:23,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:23,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:23,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280902640] [2021-10-21 20:18:23,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280902640] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:23,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:23,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:18:23,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374046672] [2021-10-21 20:18:23,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:18:23,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:23,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:18:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:18:23,290 INFO L87 Difference]: Start difference. First operand 851 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:23,316 INFO L93 Difference]: Finished difference Result 1165 states and 1644 transitions. [2021-10-21 20:18:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:18:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 20:18:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:23,323 INFO L225 Difference]: With dead ends: 1165 [2021-10-21 20:18:23,323 INFO L226 Difference]: Without dead ends: 1069 [2021-10-21 20:18:23,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:18:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-10-21 20:18:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1027. [2021-10-21 20:18:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 1.4132553606237817) internal successors, (1450), 1026 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1450 transitions. [2021-10-21 20:18:23,372 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1450 transitions. Word has length 31 [2021-10-21 20:18:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:23,372 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 1450 transitions. [2021-10-21 20:18:23,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1450 transitions. [2021-10-21 20:18:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 20:18:23,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:23,375 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:23,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:23,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:23,589 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1961462321, now seen corresponding path program 1 times [2021-10-21 20:18:23,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:23,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932767849] [2021-10-21 20:18:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:23,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:23,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:23,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:23,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 20:18:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:18:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:23,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:24,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:24,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932767849] [2021-10-21 20:18:24,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932767849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:18:24,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:18:24,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 20:18:24,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377989256] [2021-10-21 20:18:24,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:18:24,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:18:24,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:18:24,029 INFO L87 Difference]: Start difference. First operand 1027 states and 1450 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:24,804 INFO L93 Difference]: Finished difference Result 2278 states and 3209 transitions. [2021-10-21 20:18:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 20:18:24,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 20:18:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:24,813 INFO L225 Difference]: With dead ends: 2278 [2021-10-21 20:18:24,813 INFO L226 Difference]: Without dead ends: 1435 [2021-10-21 20:18:24,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:18:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-10-21 20:18:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1146. [2021-10-21 20:18:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 1.3694323144104803) internal successors, (1568), 1145 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1568 transitions. [2021-10-21 20:18:24,864 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1568 transitions. Word has length 31 [2021-10-21 20:18:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:24,865 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1568 transitions. [2021-10-21 20:18:24,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1568 transitions. [2021-10-21 20:18:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:18:24,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:24,866 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:24,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:25,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:25,067 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1953500664, now seen corresponding path program 1 times [2021-10-21 20:18:25,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:25,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285291498] [2021-10-21 20:18:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:25,068 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:25,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:25,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:25,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 20:18:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:25,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:18:25,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:25,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:25,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:25,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285291498] [2021-10-21 20:18:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285291498] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:25,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:25,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-10-21 20:18:25,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875993617] [2021-10-21 20:18:25,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:25,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:18:25,595 INFO L87 Difference]: Start difference. First operand 1146 states and 1568 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:25,931 INFO L93 Difference]: Finished difference Result 1797 states and 2473 transitions. [2021-10-21 20:18:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:18:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 20:18:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:25,941 INFO L225 Difference]: With dead ends: 1797 [2021-10-21 20:18:25,941 INFO L226 Difference]: Without dead ends: 1570 [2021-10-21 20:18:25,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:18:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-10-21 20:18:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1384. [2021-10-21 20:18:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3593637020968907) internal successors, (1880), 1383 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1880 transitions. [2021-10-21 20:18:25,995 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1880 transitions. Word has length 32 [2021-10-21 20:18:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:25,995 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1880 transitions. [2021-10-21 20:18:25,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1880 transitions. [2021-10-21 20:18:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:18:25,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:25,998 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:26,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:26,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:26,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1914622646, now seen corresponding path program 1 times [2021-10-21 20:18:26,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:26,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544559297] [2021-10-21 20:18:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:26,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:26,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:26,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 20:18:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:18:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:26,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:26,794 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:26,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544559297] [2021-10-21 20:18:26,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544559297] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-21 20:18:26,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:18:26,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-10-21 20:18:26,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027720570] [2021-10-21 20:18:26,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:18:26,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:18:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:18:26,797 INFO L87 Difference]: Start difference. First operand 1384 states and 1880 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:27,196 INFO L93 Difference]: Finished difference Result 1865 states and 2541 transitions. [2021-10-21 20:18:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:18:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-21 20:18:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:27,207 INFO L225 Difference]: With dead ends: 1865 [2021-10-21 20:18:27,207 INFO L226 Difference]: Without dead ends: 1646 [2021-10-21 20:18:27,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:18:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-10-21 20:18:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1340. [2021-10-21 20:18:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 1.3495145631067962) internal successors, (1807), 1339 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1807 transitions. [2021-10-21 20:18:27,271 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1807 transitions. Word has length 33 [2021-10-21 20:18:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:27,273 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 1807 transitions. [2021-10-21 20:18:27,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1807 transitions. [2021-10-21 20:18:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:18:27,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:27,277 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:27,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:27,488 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2055171256, now seen corresponding path program 1 times [2021-10-21 20:18:27,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:27,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805234804] [2021-10-21 20:18:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:27,489 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:27,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:27,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:27,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 20:18:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:18:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:18:27,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:27,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805234804] [2021-10-21 20:18:27,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805234804] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:18:27,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:18:27,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:18:27,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298341484] [2021-10-21 20:18:27,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:18:27,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:18:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:18:27,900 INFO L87 Difference]: Start difference. First operand 1340 states and 1807 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:28,205 INFO L93 Difference]: Finished difference Result 3524 states and 4922 transitions. [2021-10-21 20:18:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:18:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-21 20:18:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:28,218 INFO L225 Difference]: With dead ends: 3524 [2021-10-21 20:18:28,218 INFO L226 Difference]: Without dead ends: 2252 [2021-10-21 20:18:28,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-10-21 20:18:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1435. [2021-10-21 20:18:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 1.3661087866108788) internal successors, (1959), 1434 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1959 transitions. [2021-10-21 20:18:28,277 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1959 transitions. Word has length 33 [2021-10-21 20:18:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:28,277 INFO L470 AbstractCegarLoop]: Abstraction has 1435 states and 1959 transitions. [2021-10-21 20:18:28,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1959 transitions. [2021-10-21 20:18:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 20:18:28,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:28,280 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:28,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:28,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:28,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-10-21 20:18:28,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:28,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131026735] [2021-10-21 20:18:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:28,492 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:28,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:28,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 20:18:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:18:28,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:18:31,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:18:33,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:33,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131026735] [2021-10-21 20:18:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131026735] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:18:33,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:18:33,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-10-21 20:18:33,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61226540] [2021-10-21 20:18:33,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 20:18:33,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 20:18:33,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:18:33,843 INFO L87 Difference]: Start difference. First operand 1435 states and 1959 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:43,140 INFO L93 Difference]: Finished difference Result 3221 states and 4351 transitions. [2021-10-21 20:18:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-21 20:18:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-21 20:18:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:43,156 INFO L225 Difference]: With dead ends: 3221 [2021-10-21 20:18:43,157 INFO L226 Difference]: Without dead ends: 3073 [2021-10-21 20:18:43,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 7662.2ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-10-21 20:18:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-10-21 20:18:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1671. [2021-10-21 20:18:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 1.3712574850299402) internal successors, (2290), 1670 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2290 transitions. [2021-10-21 20:18:43,255 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2290 transitions. Word has length 51 [2021-10-21 20:18:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:43,255 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 2290 transitions. [2021-10-21 20:18:43,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2290 transitions. [2021-10-21 20:18:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 20:18:43,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:43,258 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:43,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:43,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:43,470 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash -65466659, now seen corresponding path program 1 times [2021-10-21 20:18:43,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:43,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898077983] [2021-10-21 20:18:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:43,471 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:43,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:43,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 20:18:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:18:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:18:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:18:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 20:18:44,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:18:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 20:18:44,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:18:44,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898077983] [2021-10-21 20:18:44,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898077983] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:18:44,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:18:44,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-21 20:18:44,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226025987] [2021-10-21 20:18:44,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:18:44,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:18:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:18:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:44,156 INFO L87 Difference]: Start difference. First operand 1671 states and 2290 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:18:44,426 INFO L93 Difference]: Finished difference Result 3359 states and 4598 transitions. [2021-10-21 20:18:44,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:18:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-10-21 20:18:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:18:44,435 INFO L225 Difference]: With dead ends: 3359 [2021-10-21 20:18:44,436 INFO L226 Difference]: Without dead ends: 1745 [2021-10-21 20:18:44,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:18:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-10-21 20:18:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1595. [2021-10-21 20:18:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.3268506900878294) internal successors, (2115), 1594 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2115 transitions. [2021-10-21 20:18:44,519 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2115 transitions. Word has length 51 [2021-10-21 20:18:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:18:44,520 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2115 transitions. [2021-10-21 20:18:44,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:18:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2115 transitions. [2021-10-21 20:18:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 20:18:44,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:18:44,523 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:18:44,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:18:44,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:44,731 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:18:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:18:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2021-10-21 20:18:44,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:18:44,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632830506] [2021-10-21 20:18:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:18:44,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:18:44,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:18:44,733 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:18:44,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 20:18:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:18:45,091 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:18:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:18:45,199 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 20:18:45,199 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:18:45,200 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:18:45,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-21 20:18:45,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:18:45,422 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:18:45,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:18:45 BoogieIcfgContainer [2021-10-21 20:18:45,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:18:45,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:18:45,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:18:45,481 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:18:45,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:18:16" (3/4) ... [2021-10-21 20:18:45,483 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:18:45,570 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:18:45,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:18:45,575 INFO L168 Benchmark]: Toolchain (without parser) took 29796.63 ms. Allocated memory was 54.5 MB in the beginning and 121.6 MB in the end (delta: 67.1 MB). Free memory was 33.0 MB in the beginning and 29.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 69.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,576 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 54.5 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:18:45,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.00 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 32.8 MB in the beginning and 50.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.42 ms. Allocated memory is still 69.2 MB. Free memory was 50.5 MB in the beginning and 48.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,577 INFO L168 Benchmark]: Boogie Preprocessor took 67.13 ms. Allocated memory is still 69.2 MB. Free memory was 48.7 MB in the beginning and 47.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,577 INFO L168 Benchmark]: RCFGBuilder took 585.82 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 50.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,578 INFO L168 Benchmark]: TraceAbstraction took 28559.19 ms. Allocated memory was 69.2 MB in the beginning and 121.6 MB in the end (delta: 52.4 MB). Free memory was 50.4 MB in the beginning and 36.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 66.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,578 INFO L168 Benchmark]: Witness Printer took 93.06 ms. Allocated memory is still 121.6 MB. Free memory was 36.0 MB in the beginning and 29.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:18:45,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 54.5 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.00 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 32.8 MB in the beginning and 50.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.42 ms. Allocated memory is still 69.2 MB. Free memory was 50.5 MB in the beginning and 48.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.13 ms. Allocated memory is still 69.2 MB. Free memory was 48.7 MB in the beginning and 47.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 585.82 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 50.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28559.19 ms. Allocated memory was 69.2 MB in the beginning and 121.6 MB in the end (delta: 52.4 MB). Free memory was 50.4 MB in the beginning and 36.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 66.6 MB. Max. memory is 16.1 GB. * Witness Printer took 93.06 ms. Allocated memory is still 121.6 MB. Free memory was 36.0 MB in the beginning and 29.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L116] unsigned int a, b, r; [L118] a = __VERIFIER_nondet_uint() [L119] b = __VERIFIER_nondet_uint() [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND TRUE a3 == (unsigned char)0 [L52] na = na - 1 [L53] COND TRUE a2 == (unsigned char)0 [L54] na = na - 1 [L55] COND TRUE a1 == (unsigned char)0 [L56] na = na - 1 [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND TRUE b1 == (unsigned char)0 [L66] nb = nb - 1 [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)254) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND FALSE !(i < na) [L81] COND FALSE !(i < nb) [L87] COND FALSE !(partial_sum > ((unsigned char)254)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND TRUE i == (unsigned char)1 [L92] r1 = (unsigned char)partial_sum [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND TRUE i == (unsigned char)2 [L102] r2 = (unsigned char)0 [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND FALSE !(i == (unsigned char)2) [L103] COND TRUE i == (unsigned char)3 [L103] r3 = (unsigned char)0 [L105] i = i + (unsigned char)1 [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L121] r = mp_add(a, b) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28422.2ms, OverallIterations: 14, TraceHistogramMax: 3, EmptinessCheckTime: 38.3ms, AutomataDifference: 14073.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1271 SDtfs, 5056 SDslu, 7292 SDs, 0 SdLazy, 6189 SolverSat, 662 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6039.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 809 GetRequests, 633 SyntacticMatches, 5 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 8571.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1671occurred in iteration=12, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 637.6ms AutomataMinimizationTime, 13 MinimizatonAttempts, 4044 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 113.9ms SsaConstructionTime, 393.2ms SatisfiabilityAnalysisTime, 8342.8ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 734 ConstructedInterpolants, 54 QuantifiedInterpolants, 6516 SizeOfPredicates, 45 NumberOfNonLiveVariables, 949 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 26 InterpolantComputations, 18 PerfectInterpolantSequences, 71/104 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 20:18:45,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6803dd-a3b4-469f-8bde-9fbf77c4c859/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...