./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.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_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 1ee118516e232ad8cb9bc41eea534ff0bb107413 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:31:41,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:31:41,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:31:41,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:31:41,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:31:41,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:31:41,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:31:41,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:31:41,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:31:41,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:31:41,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:31:41,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:31:41,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:31:41,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:31:41,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:31:41,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:31:41,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:31:41,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:31:41,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:31:41,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:31:41,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:31:41,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:31:41,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:31:41,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:31:41,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:31:41,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:31:41,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:31:41,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:31:41,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:31:41,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:31:41,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:31:41,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:31:41,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:31:41,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:31:41,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:31:41,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:31:41,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:31:41,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:31:41,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:31:41,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:31:41,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:31:41,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:31:41,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:31:41,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:31:41,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:31:41,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:31:41,599 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:31:41,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:31:41,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:31:41,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:31:41,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:31:41,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:31:41,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:31:41,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:31:41,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:31:41,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:31:41,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:31:41,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:31:41,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:31:41,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:31:41,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:31:41,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:31:41,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:31:41,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:31:41,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:31:41,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:31:41,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:31:41,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:31:41,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:31:41,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:31:41,609 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_7198c09b-c402-4f5b-a20c-5b4f943ed559/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ee118516e232ad8cb9bc41eea534ff0bb107413 [2021-10-11 00:31:41,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:31:41,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:31:41,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:31:41,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:31:41,925 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:31:41,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-10-11 00:31:42,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/data/9b1900b89/8ace72ee9f6a436cb30af83dda3d0ac6/FLAG3d4184955 [2021-10-11 00:31:42,579 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:31:42,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-10-11 00:31:42,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/data/9b1900b89/8ace72ee9f6a436cb30af83dda3d0ac6/FLAG3d4184955 [2021-10-11 00:31:42,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/data/9b1900b89/8ace72ee9f6a436cb30af83dda3d0ac6 [2021-10-11 00:31:42,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:31:42,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:31:42,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:31:42,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:31:42,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:31:42,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:31:42" (1/1) ... [2021-10-11 00:31:42,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d07674b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:42, skipping insertion in model container [2021-10-11 00:31:42,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:31:42" (1/1) ... [2021-10-11 00:31:42,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:31:42,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:31:43,168 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_7198c09b-c402-4f5b-a20c-5b4f943ed559/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c[458,471] [2021-10-11 00:31:43,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:31:43,195 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:31:43,207 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_7198c09b-c402-4f5b-a20c-5b4f943ed559/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c[458,471] [2021-10-11 00:31:43,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:31:43,230 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:31:43,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43 WrapperNode [2021-10-11 00:31:43,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:31:43,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:31:43,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:31:43,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:31:43,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:31:43,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:31:43,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:31:43,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:31:43,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... [2021-10-11 00:31:43,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:31:43,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:31:43,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:31:43,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:31:43,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:31:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:31:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:31:43,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:31:43,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:31:43,700 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 00:31:43,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:31:43 BoogieIcfgContainer [2021-10-11 00:31:43,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:31:43,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:31:43,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:31:43,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:31:43,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:31:42" (1/3) ... [2021-10-11 00:31:43,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e358211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:31:43, skipping insertion in model container [2021-10-11 00:31:43,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:31:43" (2/3) ... [2021-10-11 00:31:43,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e358211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:31:43, skipping insertion in model container [2021-10-11 00:31:43,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:31:43" (3/3) ... [2021-10-11 00:31:43,711 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound2.c [2021-10-11 00:31:43,724 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:31:43,728 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-10-11 00:31:43,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-11 00:31:43,777 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:31:43,789 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:31:43,790 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:31:43,790 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:31:43,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:31:43,790 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:31:43,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:31:43,791 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:31:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-10-11 00:31:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:31:43,824 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:43,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:43,825 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:43,845 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-10-11 00:31:43,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:43,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804170590] [2021-10-11 00:31:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:44,038 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 00:31:44,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804170590] [2021-10-11 00:31:44,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:31:44,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:31:44,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155336105] [2021-10-11 00:31:44,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:31:44,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:31:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:31:44,070 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2021-10-11 00:31:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:44,089 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-10-11 00:31:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:31:44,091 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-10-11 00:31:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:44,109 INFO L225 Difference]: With dead ends: 41 [2021-10-11 00:31:44,114 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 00:31:44,118 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 00:31:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 00:31:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 00:31:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 00:31:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-11 00:31:44,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-11 00:31:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:44,154 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-11 00:31:44,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:31:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-11 00:31:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:31:44,156 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:44,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:44,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:31:44,157 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-11 00:31:44,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:44,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597999000] [2021-10-11 00:31:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:44,200 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:44,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158640608] [2021-10-11 00:31:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:31:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:44,495 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 00:31:44,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597999000] [2021-10-11 00:31:44,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:31:44,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158640608] [2021-10-11 00:31:44,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:31:44,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:31:44,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577243517] [2021-10-11 00:31:44,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:31:44,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:31:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:31:44,511 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2021-10-11 00:31:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:44,952 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-11 00:31:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:31:44,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 00:31:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:44,954 INFO L225 Difference]: With dead ends: 36 [2021-10-11 00:31:44,954 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 00:31:44,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:31:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 00:31:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-11 00:31:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:31:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-11 00:31:44,962 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2021-10-11 00:31:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:44,962 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-11 00:31:44,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:31:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-11 00:31:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:31:44,963 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:44,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:45,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 00:31:45,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2021-10-11 00:31:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:45,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471373574] [2021-10-11 00:31:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:45,220 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:45,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556765299] [2021-10-11 00:31:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 00:31:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:45,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471373574] [2021-10-11 00:31:45,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:31:45,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556765299] [2021-10-11 00:31:45,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:31:45,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-11 00:31:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172270864] [2021-10-11 00:31:45,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:31:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:45,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:31:45,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:31:45,399 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2021-10-11 00:31:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:45,703 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-10-11 00:31:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:31:45,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-10-11 00:31:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:45,705 INFO L225 Difference]: With dead ends: 39 [2021-10-11 00:31:45,706 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:31:45,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:31:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:31:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-11 00:31:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:31:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-11 00:31:45,717 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-10-11 00:31:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:45,718 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-11 00:31:45,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:31:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-11 00:31:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:31:45,720 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:45,721 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:45,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:45,934 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-10-11 00:31:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:45,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529953678] [2021-10-11 00:31:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:45,958 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:45,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832499844] [2021-10-11 00:31:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:46,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:31:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:46,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529953678] [2021-10-11 00:31:46,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:31:46,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832499844] [2021-10-11 00:31:46,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:31:46,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-11 00:31:46,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511861113] [2021-10-11 00:31:46,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:31:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:31:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:31:46,092 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2021-10-11 00:31:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:46,126 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-11 00:31:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:31:46,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-10-11 00:31:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:46,127 INFO L225 Difference]: With dead ends: 34 [2021-10-11 00:31:46,127 INFO L226 Difference]: Without dead ends: 28 [2021-10-11 00:31:46,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:31:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-11 00:31:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-11 00:31:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:31:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-11 00:31:46,134 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-10-11 00:31:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:46,134 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-11 00:31:46,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:31:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-11 00:31:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:31:46,135 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:46,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:46,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:46,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2021-10-11 00:31:46,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:46,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729827241] [2021-10-11 00:31:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:46,362 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:46,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715047693] [2021-10-11 00:31:46,362 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_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:31:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:31:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:31:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729827241] [2021-10-11 00:31:46,536 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:31:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715047693] [2021-10-11 00:31:46,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:31:46,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-11 00:31:46,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965630704] [2021-10-11 00:31:46,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:31:46,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:31:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:31:46,538 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2021-10-11 00:31:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:46,575 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-10-11 00:31:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:31:46,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-10-11 00:31:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:46,580 INFO L225 Difference]: With dead ends: 38 [2021-10-11 00:31:46,580 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 00:31:46,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:31:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 00:31:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 00:31:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:31:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-11 00:31:46,597 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2021-10-11 00:31:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:46,597 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-11 00:31:46,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:31:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-11 00:31:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:31:46,599 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:46,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:46,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:46,812 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:46,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-10-11 00:31:46,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:46,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761534378] [2021-10-11 00:31:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:46,825 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:46,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715597871] [2021-10-11 00:31:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-11 00:31:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:47,076 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:31:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:47,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761534378] [2021-10-11 00:31:47,097 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:31:47,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715597871] [2021-10-11 00:31:47,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:31:47,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-11 00:31:47,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448920733] [2021-10-11 00:31:47,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:31:47,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:31:47,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:31:47,104 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 10 states. [2021-10-11 00:31:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:47,379 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2021-10-11 00:31:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:31:47,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-10-11 00:31:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:47,380 INFO L225 Difference]: With dead ends: 28 [2021-10-11 00:31:47,380 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 00:31:47,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-11 00:31:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 00:31:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 00:31:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 00:31:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2021-10-11 00:31:47,385 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 17 [2021-10-11 00:31:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:47,385 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2021-10-11 00:31:47,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:31:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2021-10-11 00:31:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:31:47,386 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:47,386 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:47,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 00:31:47,614 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1363812488, now seen corresponding path program 1 times [2021-10-11 00:31:47,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:47,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228419130] [2021-10-11 00:31:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:47,624 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:47,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704749200] [2021-10-11 00:31:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:31:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-11 00:31:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:31:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:31:47,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228419130] [2021-10-11 00:31:47,817 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:31:47,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704749200] [2021-10-11 00:31:47,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:31:47,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-11 00:31:47,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856326266] [2021-10-11 00:31:47,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:31:47,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:31:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:31:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:31:47,819 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 7 states. [2021-10-11 00:31:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:31:47,993 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2021-10-11 00:31:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:31:47,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-10-11 00:31:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:31:47,994 INFO L225 Difference]: With dead ends: 22 [2021-10-11 00:31:47,995 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 00:31:47,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:31:47,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 00:31:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 00:31:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 00:31:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-10-11 00:31:48,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 17 [2021-10-11 00:31:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:31:48,006 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-10-11 00:31:48,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:31:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-10-11 00:31:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 00:31:48,007 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:31:48,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:31:48,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:48,222 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:31:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:31:48,222 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2021-10-11 00:31:48,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:31:48,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100427443] [2021-10-11 00:31:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:31:48,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:31:48,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928899156] [2021-10-11 00:31:48,232 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_7198c09b-c402-4f5b-a20c-5b4f943ed559/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 00:31:48,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:31:48,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-11 00:31:48,315 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:31:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:31:48,349 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:31:48,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:31:48,402 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:31:48,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:31:48,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:31:48 BoogieIcfgContainer [2021-10-11 00:31:48,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:31:48,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:31:48,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:31:48,634 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:31:48,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:31:43" (3/4) ... [2021-10-11 00:31:48,636 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:31:48,690 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7198c09b-c402-4f5b-a20c-5b4f943ed559/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:31:48,690 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:31:48,692 INFO L168 Benchmark]: Toolchain (without parser) took 5752.26 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 75.9 MB in the beginning and 90.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,692 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 77.6 MB. Free memory is still 34.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:31:48,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.60 ms. Allocated memory is still 109.1 MB. Free memory was 75.7 MB in the beginning and 83.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,693 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.72 ms. Allocated memory is still 109.1 MB. Free memory was 83.2 MB in the beginning and 81.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,694 INFO L168 Benchmark]: Boogie Preprocessor took 22.36 ms. Allocated memory is still 109.1 MB. Free memory was 81.6 MB in the beginning and 80.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,694 INFO L168 Benchmark]: RCFGBuilder took 411.90 ms. Allocated memory is still 109.1 MB. Free memory was 80.3 MB in the beginning and 67.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,695 INFO L168 Benchmark]: TraceAbstraction took 4929.18 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 66.9 MB in the beginning and 93.2 MB in the end (delta: -26.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,695 INFO L168 Benchmark]: Witness Printer took 56.85 ms. Allocated memory is still 140.5 MB. Free memory was 92.2 MB in the beginning and 90.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:31:48,698 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 77.6 MB. Free memory is still 34.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.60 ms. Allocated memory is still 109.1 MB. Free memory was 75.7 MB in the beginning and 83.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.72 ms. Allocated memory is still 109.1 MB. Free memory was 83.2 MB in the beginning and 81.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.36 ms. Allocated memory is still 109.1 MB. Free memory was 81.6 MB in the beginning and 80.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 411.90 ms. Allocated memory is still 109.1 MB. Free memory was 80.3 MB in the beginning and 67.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4929.18 ms. Allocated memory was 109.1 MB in the beginning and 140.5 MB in the end (delta: 31.5 MB). Free memory was 66.9 MB in the beginning and 93.2 MB in the end (delta: -26.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Witness Printer took 56.85 ms. Allocated memory is still 140.5 MB. Free memory was 92.2 MB in the beginning and 90.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND FALSE !(counter++<2) [L10] COND FALSE !(!(cond)) VAL [counter=3] [L10] COND TRUE !(cond) VAL [counter=3] [L12] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 105 SDtfs, 172 SDslu, 183 SDs, 0 SdLazy, 183 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, 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, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 7312 SizeOfPredicates, 32 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 8/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...