./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22f8891fc10bb8c305de18eb9540699e7b8a01ce .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22f8891fc10bb8c305de18eb9540699e7b8a01ce ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:26:02,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:26:02,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:26:02,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:26:02,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:26:02,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:26:02,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:26:02,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:26:02,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:26:02,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:26:02,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:26:02,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:26:02,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:26:02,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:26:02,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:26:02,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:26:02,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:26:02,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:26:02,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:26:02,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:26:02,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:26:02,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:26:02,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:26:02,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:26:02,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:26:02,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:26:02,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:26:02,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:26:02,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:26:02,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:26:02,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:26:02,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:26:02,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:26:02,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:26:02,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:26:02,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:26:02,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:26:02,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:26:02,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:26:02,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:26:02,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:26:02,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:26:02,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:26:02,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:26:02,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:26:02,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:26:02,648 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:26:02,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:26:02,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:26:02,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:26:02,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:26:02,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:26:02,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:26:02,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:26:02,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:26:02,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:26:02,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:26:02,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:26:02,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:26:02,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:26:02,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:26:02,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:26:02,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:26:02,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:26:02,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:26:02,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:26:02,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:26:02,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:26:02,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:26:02,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:26:02,661 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_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22f8891fc10bb8c305de18eb9540699e7b8a01ce [2021-10-11 00:26:02,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:26:02,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:26:02,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:26:02,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:26:02,987 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:26:02,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 00:26:03,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/d752cce07/96518f3eb8a441319fe029683c13b1fc/FLAG2dd5a77fb [2021-10-11 00:26:03,532 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:26:03,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 00:26:03,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/d752cce07/96518f3eb8a441319fe029683c13b1fc/FLAG2dd5a77fb [2021-10-11 00:26:03,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/d752cce07/96518f3eb8a441319fe029683c13b1fc [2021-10-11 00:26:03,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:26:03,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:26:03,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:26:03,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:26:03,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:26:03,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:26:03" (1/1) ... [2021-10-11 00:26:03,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c5de194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:03, skipping insertion in model container [2021-10-11 00:26:03,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:26:03" (1/1) ... [2021-10-11 00:26:03,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:26:03,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:26:04,135 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 00:26:04,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:26:04,166 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:26:04,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 00:26:04,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:26:04,209 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:26:04,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04 WrapperNode [2021-10-11 00:26:04,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:26:04,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:26:04,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:26:04,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:26:04,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:26:04,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:26:04,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:26:04,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:26:04,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... [2021-10-11 00:26:04,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:26:04,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:26:04,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:26:04,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:26:04,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:26:04,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:26:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:26:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:26:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:26:04,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:26:04,567 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:26:04,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:04 BoogieIcfgContainer [2021-10-11 00:26:04,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:26:04,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:26:04,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:26:04,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:26:04,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:26:03" (1/3) ... [2021-10-11 00:26:04,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c98521c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:26:04, skipping insertion in model container [2021-10-11 00:26:04,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:04" (2/3) ... [2021-10-11 00:26:04,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c98521c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:26:04, skipping insertion in model container [2021-10-11 00:26:04,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:04" (3/3) ... [2021-10-11 00:26:04,578 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-10-11 00:26:04,592 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:26:04,595 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:26:04,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:26:04,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:26:04,630 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:26:04,630 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:26:04,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:26:04,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:26:04,631 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:26:04,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:26:04,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:26:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 00:26:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:26:04,650 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:04,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:26:04,651 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-10-11 00:26:04,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18340904] [2021-10-11 00:26:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18340904] [2021-10-11 00:26:04,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:26:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591147742] [2021-10-11 00:26:04,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:26:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:26:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:26:04,925 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-10-11 00:26:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:04,943 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 00:26:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:26:04,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:26:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:04,965 INFO L225 Difference]: With dead ends: 21 [2021-10-11 00:26:04,966 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 00:26:04,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:26:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 00:26:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 00:26:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 00:26:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 00:26:05,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-11 00:26:05,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:05,003 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 00:26:05,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:26:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 00:26:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:26:05,005 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:05,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:26:05,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:26:05,005 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-10-11 00:26:05,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:05,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272743402] [2021-10-11 00:26:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:05,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272743402] [2021-10-11 00:26:05,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:05,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:26:05,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517614670] [2021-10-11 00:26:05,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:26:05,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:05,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:26:05,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:26:05,131 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2021-10-11 00:26:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:05,163 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 00:26:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:26:05,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 00:26:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:05,165 INFO L225 Difference]: With dead ends: 16 [2021-10-11 00:26:05,165 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 00:26:05,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:26:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 00:26:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-10-11 00:26:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:26:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 00:26:05,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-10-11 00:26:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:05,176 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 00:26:05,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:26:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 00:26:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 00:26:05,176 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:05,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:05,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:26:05,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:05,178 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-10-11 00:26:05,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:05,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297737210] [2021-10-11 00:26:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:05,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297737210] [2021-10-11 00:26:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446575971] [2021-10-11 00:26:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:26:05,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:05,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:05,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-11 00:26:05,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430212896] [2021-10-11 00:26:05,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:26:05,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:26:05,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:05,344 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2021-10-11 00:26:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:05,378 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 00:26:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:26:05,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-10-11 00:26:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:05,385 INFO L225 Difference]: With dead ends: 19 [2021-10-11 00:26:05,386 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 00:26:05,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 00:26:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-10-11 00:26:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 00:26:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 00:26:05,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-10-11 00:26:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:05,393 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 00:26:05,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:26:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 00:26:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:26:05,395 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:05,395 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:05,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:26:05,614 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:05,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2021-10-11 00:26:05,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:05,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804083555] [2021-10-11 00:26:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:05,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804083555] [2021-10-11 00:26:05,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405226456] [2021-10-11 00:26:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:05,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:26:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:05,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:26:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:05,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:05,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-11 00:26:05,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926748976] [2021-10-11 00:26:05,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:26:05,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:26:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:26:05,895 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 7 states. [2021-10-11 00:26:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:05,925 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-11 00:26:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:26:05,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-10-11 00:26:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:05,926 INFO L225 Difference]: With dead ends: 22 [2021-10-11 00:26:05,926 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 00:26:05,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:26:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 00:26:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-10-11 00:26:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 00:26:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-11 00:26:05,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 12 [2021-10-11 00:26:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:05,931 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-11 00:26:05,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:26:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-11 00:26:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:26:05,932 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:05,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:06,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:06,158 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2021-10-11 00:26:06,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:06,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604347708] [2021-10-11 00:26:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:06,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604347708] [2021-10-11 00:26:06,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241434475] [2021-10-11 00:26:06,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:06,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 00:26:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:26:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:06,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:06,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-11 00:26:06,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13601958] [2021-10-11 00:26:06,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:26:06,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:26:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:26:06,383 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 9 states. [2021-10-11 00:26:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:06,434 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-10-11 00:26:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:26:06,434 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-10-11 00:26:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:06,436 INFO L225 Difference]: With dead ends: 25 [2021-10-11 00:26:06,436 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 00:26:06,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:26:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 00:26:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-10-11 00:26:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 00:26:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 00:26:06,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2021-10-11 00:26:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:06,450 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 00:26:06,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:26:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 00:26:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:26:06,451 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:06,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:06,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:06,678 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:06,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 4 times [2021-10-11 00:26:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:06,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933413748] [2021-10-11 00:26:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933413748] [2021-10-11 00:26:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756640154] [2021-10-11 00:26:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:06,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:26:06,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 00:26:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:06,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:06,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-11 00:26:06,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772438224] [2021-10-11 00:26:06,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 00:26:06,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:06,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 00:26:06,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:26:06,961 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 11 states. [2021-10-11 00:26:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:07,038 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-10-11 00:26:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:26:07,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2021-10-11 00:26:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:07,040 INFO L225 Difference]: With dead ends: 28 [2021-10-11 00:26:07,040 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 00:26:07,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:26:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 00:26:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-10-11 00:26:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:26:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-11 00:26:07,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2021-10-11 00:26:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:07,052 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-11 00:26:07,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 00:26:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-11 00:26:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:26:07,053 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:07,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:07,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:07,282 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash -133759111, now seen corresponding path program 5 times [2021-10-11 00:26:07,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:07,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442775607] [2021-10-11 00:26:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442775607] [2021-10-11 00:26:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698447087] [2021-10-11 00:26:07,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:07,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-11 00:26:07,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 00:26:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:07,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:07,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-11 00:26:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783527597] [2021-10-11 00:26:07,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 00:26:07,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:07,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 00:26:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:26:07,647 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 13 states. [2021-10-11 00:26:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:07,765 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-10-11 00:26:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:26:07,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2021-10-11 00:26:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:07,766 INFO L225 Difference]: With dead ends: 31 [2021-10-11 00:26:07,767 INFO L226 Difference]: Without dead ends: 27 [2021-10-11 00:26:07,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:26:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-11 00:26:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-10-11 00:26:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 00:26:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-10-11 00:26:07,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2021-10-11 00:26:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:07,772 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-10-11 00:26:07,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 00:26:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-10-11 00:26:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 00:26:07,774 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:07,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:08,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-11 00:26:08,001 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 6 times [2021-10-11 00:26:08,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:08,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365209407] [2021-10-11 00:26:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:08,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365209407] [2021-10-11 00:26:08,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281985783] [2021-10-11 00:26:08,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:08,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-11 00:26:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:26:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 00:26:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:08,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:08,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-11 00:26:08,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803065733] [2021-10-11 00:26:08,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 00:26:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 00:26:08,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:26:08,438 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 15 states. [2021-10-11 00:26:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:08,565 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-10-11 00:26:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:26:08,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2021-10-11 00:26:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:08,567 INFO L225 Difference]: With dead ends: 34 [2021-10-11 00:26:08,569 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 00:26:08,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-11 00:26:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 00:26:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-10-11 00:26:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:26:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-11 00:26:08,576 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 24 [2021-10-11 00:26:08,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:08,576 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-11 00:26:08,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 00:26:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-11 00:26:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 00:26:08,577 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:08,577 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:08,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:08,781 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:08,782 INFO L82 PathProgramCache]: Analyzing trace with hash 387561689, now seen corresponding path program 7 times [2021-10-11 00:26:08,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:08,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095196657] [2021-10-11 00:26:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:08,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095196657] [2021-10-11 00:26:08,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347019582] [2021-10-11 00:26:08,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-11 00:26:09,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:09,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:09,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-11 00:26:09,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801883083] [2021-10-11 00:26:09,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-10-11 00:26:09,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:26:09,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-11 00:26:09,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:26:09,274 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2021-10-11 00:26:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:09,418 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-10-11 00:26:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 00:26:09,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2021-10-11 00:26:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:09,419 INFO L225 Difference]: With dead ends: 37 [2021-10-11 00:26:09,420 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 00:26:09,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-11 00:26:09,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 00:26:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-10-11 00:26:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:26:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-10-11 00:26:09,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 27 [2021-10-11 00:26:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:09,425 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-10-11 00:26:09,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-10-11 00:26:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-10-11 00:26:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:26:09,426 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:09,426 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:09,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:26:09,642 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 8 times [2021-10-11 00:26:09,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:26:09,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789015955] [2021-10-11 00:26:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:26:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:26:09,657 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:26:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:26:09,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:26:09,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:26:09,690 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:26:09,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 00:26:09,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:26:09 BoogieIcfgContainer [2021-10-11 00:26:09,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:26:09,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:26:09,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:26:09,737 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:26:09,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:04" (3/4) ... [2021-10-11 00:26:09,741 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:26:09,741 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:26:09,743 INFO L168 Benchmark]: Toolchain (without parser) took 5826.39 ms. Allocated memory was 132.1 MB in the beginning and 169.9 MB in the end (delta: 37.7 MB). Free memory was 101.7 MB in the beginning and 88.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:09,743 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 92.3 MB. Free memory is still 51.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:26:09,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.65 ms. Allocated memory is still 132.1 MB. Free memory was 101.4 MB in the beginning and 108.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:09,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.27 ms. Allocated memory is still 132.1 MB. Free memory was 107.7 MB in the beginning and 106.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:09,745 INFO L168 Benchmark]: Boogie Preprocessor took 20.67 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 105.7 MB in the end (delta: 934.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:26:09,745 INFO L168 Benchmark]: RCFGBuilder took 304.38 ms. Allocated memory is still 132.1 MB. Free memory was 105.7 MB in the beginning and 93.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:09,746 INFO L168 Benchmark]: TraceAbstraction took 5165.38 ms. Allocated memory was 132.1 MB in the beginning and 169.9 MB in the end (delta: 37.7 MB). Free memory was 93.1 MB in the beginning and 88.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:09,747 INFO L168 Benchmark]: Witness Printer took 4.73 ms. Allocated memory is still 169.9 MB. Free memory is still 88.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:26:09,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 92.3 MB. Free memory is still 51.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.65 ms. Allocated memory is still 132.1 MB. Free memory was 101.4 MB in the beginning and 108.2 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.27 ms. Allocated memory is still 132.1 MB. Free memory was 107.7 MB in the beginning and 106.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.67 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 105.7 MB in the end (delta: 934.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 304.38 ms. Allocated memory is still 132.1 MB. Free memory was 105.7 MB in the beginning and 93.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5165.38 ms. Allocated memory was 132.1 MB in the beginning and 169.9 MB in the end (delta: 37.7 MB). Free memory was 93.1 MB in the beginning and 88.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 45.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.73 ms. Allocated memory is still 169.9 MB. Free memory is still 88.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 24, overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L16] unsigned char x; [L17] unsigned char y; [L18] unsigned char c; [L20] x = 37 [L21] y = 0 [L22] c = 0 [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND FALSE !(c < (unsigned char)8) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 134 SDslu, 640 SDs, 0 SdLazy, 609 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 248 ConstructedInterpolants, 0 QuantifiedInterpolants, 25750 SizeOfPredicates, 7 NumberOfNonLiveVariables, 455 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/392 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:26:12,149 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-10-11 00:26:12,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:26:12,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:26:12,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:26:12,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:26:12,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:26:12,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:26:12,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:26:12,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:26:12,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:26:12,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:26:12,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:26:12,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-11 00:26:12,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:26:12,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:26:12,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:26:12,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:26:12,322 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:26:12,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:26:12,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:26:12,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:26:12,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:26:12,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:26:12,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:26:12,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:26:12,325 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 00:26:12,325 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 00:26:12,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:26:12,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:26:12,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:26:12,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:26:12,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:26:12,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:26:12,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:26:12,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:26:12,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:26:12,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:26:12,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:26:12,328 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-11 00:26:12,328 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 00:26:12,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:26:12,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:26:12,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 00:26:12,330 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_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22f8891fc10bb8c305de18eb9540699e7b8a01ce [2021-10-11 00:26:12,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:26:12,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:26:12,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:26:12,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:26:12,775 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:26:12,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 00:26:12,858 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/d14c601eb/fb4aaad98d5d41f396c5eaa38deb6a8c/FLAG3eaa8d98f [2021-10-11 00:26:13,317 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:26:13,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 00:26:13,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/d14c601eb/fb4aaad98d5d41f396c5eaa38deb6a8c/FLAG3eaa8d98f [2021-10-11 00:26:13,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/data/d14c601eb/fb4aaad98d5d41f396c5eaa38deb6a8c [2021-10-11 00:26:13,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:26:13,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:26:13,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:26:13,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:26:13,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:26:13,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:13,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e99334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13, skipping insertion in model container [2021-10-11 00:26:13,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:13,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:26:13,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:26:13,895 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 00:26:13,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:26:13,919 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:26:13,931 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 00:26:13,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:26:13,950 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:26:13,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13 WrapperNode [2021-10-11 00:26:13,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:26:13,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:26:13,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:26:13,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:26:13,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:13,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:26:14,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:26:14,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:26:14,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:26:14,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... [2021-10-11 00:26:14,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:26:14,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:26:14,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:26:14,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:26:14,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:26:14,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:26:14,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:26:14,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 00:26:14,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:26:14,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:26:14,390 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:26:14,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:14 BoogieIcfgContainer [2021-10-11 00:26:14,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:26:14,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:26:14,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:26:14,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:26:14,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:26:13" (1/3) ... [2021-10-11 00:26:14,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb41b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:26:14, skipping insertion in model container [2021-10-11 00:26:14,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:26:13" (2/3) ... [2021-10-11 00:26:14,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb41b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:26:14, skipping insertion in model container [2021-10-11 00:26:14,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:14" (3/3) ... [2021-10-11 00:26:14,399 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-10-11 00:26:14,413 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:26:14,416 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:26:14,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:26:14,479 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:26:14,480 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:26:14,480 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:26:14,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:26:14,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:26:14,480 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:26:14,480 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:26:14,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:26:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 00:26:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:26:14,517 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:14,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:26:14,519 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:14,531 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-10-11 00:26:14,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:14,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458318393] [2021-10-11 00:26:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 00:26:14,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:14,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:26:14,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458318393] [2021-10-11 00:26:14,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:14,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:26:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457107084] [2021-10-11 00:26:14,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:26:14,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:26:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:26:14,803 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-10-11 00:26:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:14,838 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 00:26:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:26:14,840 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:26:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:14,847 INFO L225 Difference]: With dead ends: 21 [2021-10-11 00:26:14,852 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 00:26:14,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:26:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 00:26:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 00:26:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 00:26:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 00:26:14,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-11 00:26:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:14,909 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 00:26:14,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:26:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 00:26:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:26:14,910 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:14,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:26:15,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 00:26:15,118 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-10-11 00:26:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:15,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014554656] [2021-10-11 00:26:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:26:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:15,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:26:15,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014554656] [2021-10-11 00:26:15,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:15,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:26:15,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765124915] [2021-10-11 00:26:15,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:26:15,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:26:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:26:15,227 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2021-10-11 00:26:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:15,243 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 00:26:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:26:15,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 00:26:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:15,245 INFO L225 Difference]: With dead ends: 16 [2021-10-11 00:26:15,245 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 00:26:15,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:26:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 00:26:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-10-11 00:26:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:26:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 00:26:15,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-10-11 00:26:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:15,256 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 00:26:15,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:26:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 00:26:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 00:26:15,258 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:15,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:15,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 00:26:15,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-10-11 00:26:15,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:15,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347226383] [2021-10-11 00:26:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:15,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:26:15,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:15,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:26:15,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347226383] [2021-10-11 00:26:15,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:26:15,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:26:15,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134364635] [2021-10-11 00:26:15,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:26:15,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:26:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:26:15,586 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2021-10-11 00:26:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:15,631 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-11 00:26:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:26:15,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 00:26:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:15,633 INFO L225 Difference]: With dead ends: 24 [2021-10-11 00:26:15,633 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 00:26:15,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:26:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 00:26:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2021-10-11 00:26:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 00:26:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 00:26:15,637 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 00:26:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:15,637 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 00:26:15,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:26:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 00:26:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 00:26:15,638 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:15,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:15,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 00:26:15,850 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2021-10-11 00:26:15,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:15,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828384825] [2021-10-11 00:26:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:15,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:26:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:15,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:26:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:16,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828384825] [2021-10-11 00:26:16,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:16,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-11 00:26:16,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802309079] [2021-10-11 00:26:16,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:26:16,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:16,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:26:16,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:26:16,035 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2021-10-11 00:26:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:16,110 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-10-11 00:26:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:26:16,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-10-11 00:26:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:16,113 INFO L225 Difference]: With dead ends: 23 [2021-10-11 00:26:16,113 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 00:26:16,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:26:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 00:26:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 00:26:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 00:26:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 00:26:16,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2021-10-11 00:26:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:16,122 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 00:26:16,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:26:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 00:26:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:26:16,123 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:16,124 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:16,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 00:26:16,338 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:16,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1843204080, now seen corresponding path program 1 times [2021-10-11 00:26:16,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:16,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615642472] [2021-10-11 00:26:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:26:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 00:26:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:26:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 00:26:16,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615642472] [2021-10-11 00:26:16,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-11 00:26:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616431005] [2021-10-11 00:26:16,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:26:16,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:16,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:26:16,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:26:16,705 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2021-10-11 00:26:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:17,118 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-10-11 00:26:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 00:26:17,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-10-11 00:26:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:17,121 INFO L225 Difference]: With dead ends: 56 [2021-10-11 00:26:17,121 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 00:26:17,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-11 00:26:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 00:26:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2021-10-11 00:26:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 00:26:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-11 00:26:17,135 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2021-10-11 00:26:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:17,135 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-11 00:26:17,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:26:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-11 00:26:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:26:17,139 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:17,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:17,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 00:26:17,358 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1771704846, now seen corresponding path program 2 times [2021-10-11 00:26:17,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:17,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777485639] [2021-10-11 00:26:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:17,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:26:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:26:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777485639] [2021-10-11 00:26:17,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:17,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-11 00:26:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205380610] [2021-10-11 00:26:17,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 00:26:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 00:26:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:26:17,585 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 12 states. [2021-10-11 00:26:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:17,729 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-11 00:26:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 00:26:17,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-10-11 00:26:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:17,740 INFO L225 Difference]: With dead ends: 35 [2021-10-11 00:26:17,741 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 00:26:17,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:26:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 00:26:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 00:26:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:26:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-10-11 00:26:17,752 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2021-10-11 00:26:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:17,752 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-10-11 00:26:17,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 00:26:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-10-11 00:26:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:26:17,753 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:17,754 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:17,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 00:26:17,965 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -29656432, now seen corresponding path program 3 times [2021-10-11 00:26:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:17,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579265294] [2021-10-11 00:26:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 00:26:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 00:26:18,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:26:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 00:26:19,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579265294] [2021-10-11 00:26:19,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:19,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-11 00:26:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602413243] [2021-10-11 00:26:19,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-10-11 00:26:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-11 00:26:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-10-11 00:26:19,112 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 28 states. [2021-10-11 00:26:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:20,228 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-11 00:26:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-11 00:26:20,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2021-10-11 00:26:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:20,229 INFO L225 Difference]: With dead ends: 60 [2021-10-11 00:26:20,229 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 00:26:20,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-10-11 00:26:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 00:26:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-11 00:26:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 00:26:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-10-11 00:26:20,238 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 30 [2021-10-11 00:26:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:20,239 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-10-11 00:26:20,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-10-11 00:26:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-10-11 00:26:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:26:20,240 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:26:20,240 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-11 00:26:20,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 00:26:20,461 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:26:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:26:20,462 INFO L82 PathProgramCache]: Analyzing trace with hash -86914734, now seen corresponding path program 4 times [2021-10-11 00:26:20,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:26:20,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015636670] [2021-10-11 00:26:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 00:26:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:26:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 00:26:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:26:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 00:26:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:26:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015636670] [2021-10-11 00:26:21,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:26:21,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-10-11 00:26:21,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336531795] [2021-10-11 00:26:21,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-10-11 00:26:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:26:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-11 00:26:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-10-11 00:26:21,035 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 19 states. [2021-10-11 00:26:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:26:21,293 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-10-11 00:26:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-11 00:26:21,294 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2021-10-11 00:26:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:26:21,295 INFO L225 Difference]: With dead ends: 49 [2021-10-11 00:26:21,295 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:26:21,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-10-11 00:26:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:26:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:26:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:26:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:26:21,302 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-10-11 00:26:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:26:21,303 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:26:21,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-10-11 00:26:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:26:21,303 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:26:21,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 00:26:21,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 00:26:21,940 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-10-11 00:26:21,944 INFO L265 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2021-10-11 00:26:21,944 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 00:26:21,945 INFO L258 CegarLoopResult]: At program point L23-2(lines 23 30) the Hoare annotation is: (let ((.cse4 ((_ zero_extend 24) ULTIMATE.start_main_~c~0))) (let ((.cse10 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse4 (_ bv1 32)))))) (let ((.cse6 ((_ zero_extend 24) ULTIMATE.start_main_~x~0)) (.cse9 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse10 (_ bv1 32))))) (.cse5 ((_ zero_extend 24) ULTIMATE.start_main_~y~0))) (let ((.cse7 (= .cse6 ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse9 (_ bv1 32)))) (_ bv1 32))))))) ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse5 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse10))))))))))) (.cse8 (= .cse6 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse5 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse9)))))))) (.cse2 (= (_ bv5 8) ULTIMATE.start_main_~y~0)) (.cse3 (= ULTIMATE.start_main_~bit~0 (_ bv0 8))) (.cse1 (= (_ bv1 8) ULTIMATE.start_main_~y~0)) (.cse0 (= (_ bv37 8) ULTIMATE.start_main_~x~0))) (or (and (not (= (_ bv0 32) ((_ zero_extend 24) ULTIMATE.start_main_~bit~0))) (= (_ bv1 8) ULTIMATE.start_main_~c~0) .cse0 .cse1) (and .cse2 .cse3 .cse0 (= (_ bv5 8) ULTIMATE.start_main_~c~0)) (and (= ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse4))) .cse5))) .cse6) .cse7 .cse0) (and (= (_ bv6 8) ULTIMATE.start_main_~c~0) .cse0 .cse8) (and .cse2 (= (_ bv3 8) ULTIMATE.start_main_~c~0) (= (_ bv0 8) (bvadd ULTIMATE.start_main_~bit~0 (_ bv252 8))) .cse0) (and .cse7 .cse3 .cse0 .cse8) (and .cse2 .cse3 (= (_ bv4 8) ULTIMATE.start_main_~c~0) .cse0) (and (= (_ bv2 8) ULTIMATE.start_main_~c~0) .cse3 .cse0 .cse1) (and (= (_ bv0 8) ULTIMATE.start_main_~c~0) .cse0 (= (_ bv0 8) ULTIMATE.start_main_~y~0))))))) [2021-10-11 00:26:21,945 INFO L262 CegarLoopResult]: For program point L23-3(lines 23 30) no Hoare annotation was computed. [2021-10-11 00:26:21,945 INFO L262 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-10-11 00:26:21,945 INFO L265 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2021-10-11 00:26:21,945 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 00:26:21,946 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 00:26:21,946 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 00:26:21,946 INFO L262 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-10-11 00:26:21,946 INFO L262 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2021-10-11 00:26:21,946 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-11 00:26:21,946 INFO L262 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2021-10-11 00:26:21,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:26:21 BoogieIcfgContainer [2021-10-11 00:26:21,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:26:21,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:26:21,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:26:21,984 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:26:21,984 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:26:14" (3/4) ... [2021-10-11 00:26:21,987 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:26:21,997 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 00:26:21,997 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 00:26:21,997 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:26:21,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:26:22,051 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f8fd70e-1a3d-4e7a-b09d-fb701c4fd393/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:26:22,051 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:26:22,053 INFO L168 Benchmark]: Toolchain (without parser) took 8365.59 ms. Allocated memory was 73.4 MB in the beginning and 94.4 MB in the end (delta: 21.0 MB). Free memory was 39.3 MB in the beginning and 43.0 MB in the end (delta: -3.7 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:22,056 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory was 55.7 MB in the beginning and 55.6 MB in the end (delta: 63.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:26:22,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.27 ms. Allocated memory is still 73.4 MB. Free memory was 39.1 MB in the beginning and 50.3 MB in the end (delta: -11.2 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:22,058 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.10 ms. Allocated memory is still 73.4 MB. Free memory was 50.1 MB in the beginning and 58.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:22,061 INFO L168 Benchmark]: Boogie Preprocessor took 34.92 ms. Allocated memory is still 73.4 MB. Free memory was 58.6 MB in the beginning and 57.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:26:22,063 INFO L168 Benchmark]: RCFGBuilder took 330.53 ms. Allocated memory is still 73.4 MB. Free memory was 57.6 MB in the beginning and 45.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:22,064 INFO L168 Benchmark]: TraceAbstraction took 7590.16 ms. Allocated memory was 73.4 MB in the beginning and 94.4 MB in the end (delta: 21.0 MB). Free memory was 45.2 MB in the beginning and 45.1 MB in the end (delta: 140.6 kB). Peak memory consumption was 44.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:22,065 INFO L168 Benchmark]: Witness Printer took 67.74 ms. Allocated memory is still 94.4 MB. Free memory was 45.1 MB in the beginning and 43.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:26:22,068 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory was 55.7 MB in the beginning and 55.6 MB in the end (delta: 63.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.27 ms. Allocated memory is still 73.4 MB. Free memory was 39.1 MB in the beginning and 50.3 MB in the end (delta: -11.2 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 72.10 ms. Allocated memory is still 73.4 MB. Free memory was 50.1 MB in the beginning and 58.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.92 ms. Allocated memory is still 73.4 MB. Free memory was 58.6 MB in the beginning and 57.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 330.53 ms. Allocated memory is still 73.4 MB. Free memory was 57.6 MB in the beginning and 45.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7590.16 ms. Allocated memory was 73.4 MB in the beginning and 94.4 MB in the end (delta: 21.0 MB). Free memory was 45.2 MB in the beginning and 45.1 MB in the end (delta: 140.6 kB). Peak memory consumption was 44.6 MB. Max. memory is 16.1 GB. * Witness Printer took 67.74 ms. Allocated memory is still 94.4 MB. Free memory was 45.1 MB in the beginning and 43.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((!(0bv32 == ~zero_extendFrom8To32(bit)) && 1bv8 == c) && 37bv8 == x) && 1bv8 == y) || (((5bv8 == y && bit == 0bv8) && 37bv8 == x) && 5bv8 == c)) || ((~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]), ~zero_extendFrom8To32(y))[7:0]) == ~zero_extendFrom8To32(x) && ~zero_extendFrom8To32(x) == ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]), ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]))[7:0]))[7:0]))[7:0])) && 37bv8 == x)) || ((6bv8 == c && 37bv8 == x) && ~zero_extendFrom8To32(x) == ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0]))) || (((5bv8 == y && 3bv8 == c) && 0bv8 == ~bvadd64(bit, 252bv8)) && 37bv8 == x)) || (((~zero_extendFrom8To32(x) == ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]), ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]))[7:0]))[7:0]))[7:0]) && bit == 0bv8) && 37bv8 == x) && ~zero_extendFrom8To32(x) == ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0]))) || (((5bv8 == y && bit == 0bv8) && 4bv8 == c) && 37bv8 == x)) || (((2bv8 == c && bit == 0bv8) && 37bv8 == x) && 1bv8 == y)) || ((0bv8 == c && 37bv8 == x) && 0bv8 == y) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.0s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 148 SDslu, 286 SDs, 0 SdLazy, 776 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 29 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 244 HoareAnnotationTreeSize, 3 FomulaSimplifications, 78 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 108 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 218 ConstructedInterpolants, 0 QuantifiedInterpolants, 54965 SizeOfPredicates, 22 NumberOfNonLiveVariables, 373 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 75/459 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 correct! Received shutdown request...