./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/brs5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa --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 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:53:24,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:53:24,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:53:24,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:53:24,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:53:24,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:53:24,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:53:24,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:53:24,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:53:24,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:53:24,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:53:24,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:53:24,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:53:24,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:53:24,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:53:24,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:53:24,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:53:24,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:53:24,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:53:24,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:53:24,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:53:24,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:53:24,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:53:24,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:53:24,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:53:24,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:53:24,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:53:24,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:53:24,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:53:24,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:53:24,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:53:24,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:53:24,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:53:24,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:53:24,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:53:24,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:53:24,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:53:24,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:53:24,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:53:24,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:53:24,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:53:24,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:53:24,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:53:24,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:53:24,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:53:24,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:53:24,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:53:24,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:53:24,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:53:24,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:53:24,547 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:53:24,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:53:24,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:53:24,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:53:24,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:53:24,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:53:24,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:53:24,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:53:24,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:53:24,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:53:24,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:53:24,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:53:24,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:53:24,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:53:24,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:53:24,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:53:24,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:53:24,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:53:24,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:53:24,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:53:24,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:53:24,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:53:24,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:53:24,557 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:53:24,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:53:24,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:53:24,557 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_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2021-12-07 00:53:24,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:53:24,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:53:24,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:53:24,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:53:24,759 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:53:24,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/brs5.c [2021-12-07 00:53:24,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/data/f6e7b9ca1/d94eddbe0aa14716924ae868578a460a/FLAG8b7d63771 [2021-12-07 00:53:25,172 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:53:25,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/sv-benchmarks/c/array-fpi/brs5.c [2021-12-07 00:53:25,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/data/f6e7b9ca1/d94eddbe0aa14716924ae868578a460a/FLAG8b7d63771 [2021-12-07 00:53:25,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/data/f6e7b9ca1/d94eddbe0aa14716924ae868578a460a [2021-12-07 00:53:25,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:53:25,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:53:25,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:53:25,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:53:25,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:53:25,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d55577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25, skipping insertion in model container [2021-12-07 00:53:25,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:53:25,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:53:25,329 WARN L230 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_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2021-12-07 00:53:25,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:53:25,348 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:53:25,357 WARN L230 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_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2021-12-07 00:53:25,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:53:25,372 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:53:25,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25 WrapperNode [2021-12-07 00:53:25,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:53:25,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:53:25,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:53:25,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:53:25,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,399 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-07 00:53:25,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:53:25,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:53:25,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:53:25,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:53:25,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:53:25,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:53:25,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:53:25,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:53:25,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (1/1) ... [2021-12-07 00:53:25,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:53:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:25,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:53:25,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:53:25,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:53:25,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:53:25,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:53:25,530 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:53:25,531 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:53:25,646 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:53:25,652 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:53:25,652 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:53:25,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:53:25 BoogieIcfgContainer [2021-12-07 00:53:25,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:53:25,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:53:25,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:53:25,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:53:25,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:53:25" (1/3) ... [2021-12-07 00:53:25,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c53b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:53:25, skipping insertion in model container [2021-12-07 00:53:25,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:53:25" (2/3) ... [2021-12-07 00:53:25,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c53b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:53:25, skipping insertion in model container [2021-12-07 00:53:25,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:53:25" (3/3) ... [2021-12-07 00:53:25,662 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2021-12-07 00:53:25,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:53:25,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:53:25,716 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:53:25,722 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:53:25,722 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:53:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:53:25,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:25,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:25,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-07 00:53:25,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:25,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967990612] [2021-12-07 00:53:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:25,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:25,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967990612] [2021-12-07 00:53:25,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967990612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:53:25,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:53:25,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:53:25,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086206417] [2021-12-07 00:53:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:53:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:53:25,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:25,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:53:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:53:25,897 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:25,909 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-07 00:53:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:53:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-07 00:53:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:25,916 INFO L225 Difference]: With dead ends: 36 [2021-12-07 00:53:25,917 INFO L226 Difference]: Without dead ends: 16 [2021-12-07 00:53:25,919 INFO L932 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 [2021-12-07 00:53:25,923 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:25,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:53:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-07 00:53:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-07 00:53:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-07 00:53:25,950 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-07 00:53:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:25,950 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-07 00:53:25,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-07 00:53:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:53:25,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:25,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:25,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:53:25,952 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-07 00:53:25,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:25,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339577693] [2021-12-07 00:53:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:25,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:26,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:26,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339577693] [2021-12-07 00:53:26,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339577693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:53:26,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:53:26,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:53:26,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597504010] [2021-12-07 00:53:26,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:53:26,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:53:26,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:53:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:53:26,040 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:26,094 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-07 00:53:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:53:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-07 00:53:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:26,096 INFO L225 Difference]: With dead ends: 33 [2021-12-07 00:53:26,096 INFO L226 Difference]: Without dead ends: 22 [2021-12-07 00:53:26,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:53:26,098 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:26,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:53:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-07 00:53:26,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-07 00:53:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-07 00:53:26,104 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-07 00:53:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:26,105 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-07 00:53:26,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-07 00:53:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 00:53:26,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:26,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:26,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:53:26,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-07 00:53:26,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:26,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136074326] [2021-12-07 00:53:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:26,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:53:26,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136074326] [2021-12-07 00:53:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136074326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:53:26,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:53:26,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:53:26,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264960738] [2021-12-07 00:53:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:53:26,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:53:26,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:53:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:53:26,201 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:26,241 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-07 00:53:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:53:26,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-07 00:53:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:26,243 INFO L225 Difference]: With dead ends: 27 [2021-12-07 00:53:26,243 INFO L226 Difference]: Without dead ends: 23 [2021-12-07 00:53:26,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:53:26,245 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:26,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:53:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-07 00:53:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-07 00:53:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-07 00:53:26,250 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-07 00:53:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:26,251 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-07 00:53:26,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-07 00:53:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:53:26,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:26,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:26,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:53:26,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-07 00:53:26,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:26,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061074410] [2021-12-07 00:53:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:26,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:26,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:26,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061074410] [2021-12-07 00:53:26,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061074410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:26,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535278136] [2021-12-07 00:53:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:26,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:26,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:26,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:53:26,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:53:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:26,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:53:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:53:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:26,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:53:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:26,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535278136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:53:26,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:53:26,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-07 00:53:26,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158548002] [2021-12-07 00:53:26,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:53:26,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:53:26,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:53:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:53:26,500 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:26,570 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-07 00:53:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:53:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-07 00:53:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:26,571 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:53:26,571 INFO L226 Difference]: Without dead ends: 29 [2021-12-07 00:53:26,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:53:26,572 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:26,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:53:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-07 00:53:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-07 00:53:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-07 00:53:26,576 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-07 00:53:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:26,576 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-07 00:53:26,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-07 00:53:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 00:53:26,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:26,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:26,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:53:26,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:26,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:26,780 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-07 00:53:26,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270555318] [2021-12-07 00:53:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:26,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:27,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270555318] [2021-12-07 00:53:27,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270555318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607647929] [2021-12-07 00:53:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:27,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:27,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:53:27,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:53:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 00:53:27,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:53:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:53:27,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:53:27,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 00:53:27,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:53:27,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2021-12-07 00:53:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2021-12-07 00:53:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:53:36,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 210 [2021-12-07 00:53:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:36,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607647929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:53:36,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:53:36,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-12-07 00:53:36,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886239044] [2021-12-07 00:53:36,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:53:36,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:53:36,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:53:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=491, Unknown=6, NotChecked=0, Total=600 [2021-12-07 00:53:36,918 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:37,084 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-12-07 00:53:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:53:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-07 00:53:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:37,085 INFO L225 Difference]: With dead ends: 52 [2021-12-07 00:53:37,085 INFO L226 Difference]: Without dead ends: 32 [2021-12-07 00:53:37,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=142, Invalid=608, Unknown=6, NotChecked=0, Total=756 [2021-12-07 00:53:37,086 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:37,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 61 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-12-07 00:53:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-07 00:53:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-07 00:53:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-07 00:53:37,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2021-12-07 00:53:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:37,090 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-07 00:53:37,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-07 00:53:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:53:37,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:37,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:37,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:53:37,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:37,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-07 00:53:37,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:37,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980419087] [2021-12-07 00:53:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:37,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:37,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980419087] [2021-12-07 00:53:37,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980419087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129787068] [2021-12-07 00:53:37,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:53:37,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:37,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:37,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:53:37,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:53:37,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:53:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:53:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:53:37,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:53:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:37,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:53:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:37,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129787068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:53:37,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:53:37,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-07 00:53:37,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256220436] [2021-12-07 00:53:37,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:53:37,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:53:37,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:53:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:53:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:53:37,525 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:37,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:53:37,624 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-12-07 00:53:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:53:37,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-07 00:53:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:53:37,625 INFO L225 Difference]: With dead ends: 69 [2021-12-07 00:53:37,625 INFO L226 Difference]: Without dead ends: 46 [2021-12-07 00:53:37,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:53:37,626 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:53:37,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:53:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-07 00:53:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-12-07 00:53:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-12-07 00:53:37,631 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2021-12-07 00:53:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:53:37,631 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-12-07 00:53:37,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:53:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-12-07 00:53:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 00:53:37,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:53:37,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:53:37,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:53:37,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:53:37,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:53:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:53:37,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 3 times [2021-12-07 00:53:37,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:53:37,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293351287] [2021-12-07 00:53:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:53:37,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:53:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:53:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:53:38,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:53:38,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293351287] [2021-12-07 00:53:38,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293351287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:53:38,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846980864] [2021-12-07 00:53:38,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:53:38,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:53:38,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:53:38,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:53:38,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:53:38,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:53:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:53:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 00:53:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:53:38,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:53:38,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:53:38,518 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-07 00:53:38,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 00:53:39,868 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-07 00:53:39,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-12-07 00:53:39,951 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-12-07 00:53:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-07 00:53:40,104 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-12-07 00:53:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 68 [2021-12-07 00:53:48,658 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-07 00:53:48,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 21 [2021-12-07 00:53:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:53:48,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:53:50,991 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 Int) (|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_145 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (or (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_147)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 4)) v_ArrVal_147) (* 5 c_~N~0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0) (< (+ v_ArrVal_145 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_145)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1))) v_ArrVal_147) (< 0 v_ArrVal_145) (<= c_~N~0 (+ |ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-07 00:54:21,989 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-07 00:54:21,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 756 treesize of output 731 [2021-12-07 00:54:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 5 not checked. [2021-12-07 00:54:27,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846980864] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:27,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:54:27,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 48 [2021-12-07 00:54:27,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367414818] [2021-12-07 00:54:27,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:27,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-07 00:54:27,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-07 00:54:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1796, Unknown=18, NotChecked=90, Total=2256 [2021-12-07 00:54:27,658 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:42,681 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2021-12-07 00:54:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:54:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-07 00:54:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:42,682 INFO L225 Difference]: With dead ends: 91 [2021-12-07 00:54:42,682 INFO L226 Difference]: Without dead ends: 64 [2021-12-07 00:54:42,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=706, Invalid=3435, Unknown=23, NotChecked=126, Total=4290 [2021-12-07 00:54:42,684 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:42,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 78 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 198 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2021-12-07 00:54:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-07 00:54:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-12-07 00:54:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-07 00:54:42,693 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2021-12-07 00:54:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:42,693 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-07 00:54:42,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-07 00:54:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 00:54:42,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:42,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:42,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:54:42,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:42,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:42,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:42,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 4 times [2021-12-07 00:54:42,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:42,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625382079] [2021-12-07 00:54:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:42,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:42,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:42,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625382079] [2021-12-07 00:54:42,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625382079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:42,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212861462] [2021-12-07 00:54:42,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:54:42,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:42,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:43,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:43,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:54:43,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:54:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:54:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:54:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:43,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:43,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212861462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:43,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:54:43,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-07 00:54:43,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75963067] [2021-12-07 00:54:43,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:54:43,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:54:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:54:43,148 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:43,336 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-12-07 00:54:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:54:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-07 00:54:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:43,339 INFO L225 Difference]: With dead ends: 118 [2021-12-07 00:54:43,339 INFO L226 Difference]: Without dead ends: 78 [2021-12-07 00:54:43,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:54:43,341 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:43,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:54:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-07 00:54:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2021-12-07 00:54:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-07 00:54:43,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 32 [2021-12-07 00:54:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:43,350 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-07 00:54:43,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-07 00:54:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 00:54:43,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:43,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:43,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:54:43,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:43,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 5 times [2021-12-07 00:54:43,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:43,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652812721] [2021-12-07 00:54:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:43,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:44,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652812721] [2021-12-07 00:54:44,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652812721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254914352] [2021-12-07 00:54:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:54:44,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:44,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:44,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3bf5ba-e52b-43c7-88d7-e12fe5b5b211/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:54:44,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-07 00:54:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:54:44,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 00:54:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:44,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:54:44,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 00:54:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 00:54:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-12-07 00:54:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-12-07 00:54:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:54:44,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2021-12-07 00:54:44,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:54:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2021-12-07 00:54:44,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 00:54:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:44,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2021-12-07 00:54:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:54:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2021-12-07 00:54:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:45,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:59,435 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_236 Int) (v_ArrVal_243 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) v_ArrVal_236)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (div (+ (* v_ArrVal_243 (- 1)) (* (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_243)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (- 1))) (- 5)) 4) (< 0 v_ArrVal_236) (< (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)))) v_ArrVal_243))))) is different from false [2021-12-07 00:55:23,592 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-07 00:55:23,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58041 treesize of output 55737