./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2o.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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:54:28,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:54:28,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:54:28,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:54:28,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:54:28,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:54:28,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:54:28,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:54:28,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:54:28,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:54:28,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:54:28,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:54:28,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:54:28,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:54:28,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:54:28,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:54:28,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:54:28,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:54:28,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:54:28,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:54:28,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:54:28,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:54:28,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:54:28,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:54:28,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:54:28,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:54:28,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:54:28,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:54:28,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:54:28,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:54:28,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:54:28,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:54:28,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:54:28,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:54:28,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:54:28,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:54:28,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:54:28,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:54:28,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:54:28,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:54:28,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:54:28,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:54:28,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:54:28,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:54:28,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:54:28,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:54:28,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:54:28,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:54:28,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:54:28,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:54:28,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:54:28,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:54:28,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:54:28,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:54:28,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:54:28,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:54:28,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:54:28,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:54:28,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:54:28,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:54:28,755 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:54:28,755 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:54:28,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:54:28,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:54:28,755 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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2021-12-06 17:54:28,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:54:28,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:54:28,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:54:28,982 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:54:28,983 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:54:28,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/res2o.c [2021-12-06 17:54:29,025 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/3037a50ff/ba4e8144f7674493aa03224b552833d8/FLAG8cfe4b5bf [2021-12-06 17:54:29,406 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:54:29,407 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/sv-benchmarks/c/array-fpi/res2o.c [2021-12-06 17:54:29,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/3037a50ff/ba4e8144f7674493aa03224b552833d8/FLAG8cfe4b5bf [2021-12-06 17:54:29,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/3037a50ff/ba4e8144f7674493aa03224b552833d8 [2021-12-06 17:54:29,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:54:29,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:54:29,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:54:29,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:54:29,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:54:29,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190ebd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29, skipping insertion in model container [2021-12-06 17:54:29,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:54:29,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:54:29,575 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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2021-12-06 17:54:29,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:54:29,600 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:54:29,611 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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2021-12-06 17:54:29,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:54:29,632 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:54:29,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29 WrapperNode [2021-12-06 17:54:29,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:54:29,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:54:29,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:54:29,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:54:29,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,663 INFO L137 Inliner]: procedures = 17, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2021-12-06 17:54:29,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:54:29,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:54:29,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:54:29,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:54:29,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:54:29,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:54:29,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:54:29,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:54:29,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (1/1) ... [2021-12-06 17:54:29,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:54:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:29,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:54:29,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:54:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:54:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:54:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:54:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:54:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:54:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:54:29,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:54:29,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:54:29,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:54:29,814 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:54:29,815 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:54:29,955 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:54:29,961 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:54:29,962 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 17:54:29,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:54:29 BoogieIcfgContainer [2021-12-06 17:54:29,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:54:29,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:54:29,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:54:29,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:54:29,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:54:29" (1/3) ... [2021-12-06 17:54:29,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6469e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:54:29, skipping insertion in model container [2021-12-06 17:54:29,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:54:29" (2/3) ... [2021-12-06 17:54:29,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6469e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:54:29, skipping insertion in model container [2021-12-06 17:54:29,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:54:29" (3/3) ... [2021-12-06 17:54:29,973 INFO L111 eAbstractionObserver]: Analyzing ICFG res2o.c [2021-12-06 17:54:29,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:54:29,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:54:30,016 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:54:30,021 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 [2021-12-06 17:54:30,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:54:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:54:30,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:30,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:30,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2021-12-06 17:54:30,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407732480] [2021-12-06 17:54:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:30,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:30,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:30,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407732480] [2021-12-06 17:54:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407732480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:54:30,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:54:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:54:30,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695830084] [2021-12-06 17:54:30,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:54:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:54:30,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:54:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:54:30,193 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-06 17:54:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:30,205 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2021-12-06 17:54:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:54:30,207 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 17:54:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:30,215 INFO L225 Difference]: With dead ends: 56 [2021-12-06 17:54:30,216 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:54:30,218 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 [2021-12-06 17:54:30,223 INFO L933 BasicCegarLoop]: 36 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, 36 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 [2021-12-06 17:54:30,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:54:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:54:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 17:54:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-12-06 17:54:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-06 17:54:30,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2021-12-06 17:54:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:30,261 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-06 17:54:30,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-06 17:54:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-06 17:54:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:54:30,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:30,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:30,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:54:30,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2021-12-06 17:54:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715259913] [2021-12-06 17:54:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:30,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:30,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:30,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715259913] [2021-12-06 17:54:30,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715259913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:54:30,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:54:30,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:54:30,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042535600] [2021-12-06 17:54:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:54:30,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:54:30,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:30,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:54:30,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:54:30,360 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:30,435 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-06 17:54:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:54:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 17:54:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:30,437 INFO L225 Difference]: With dead ends: 57 [2021-12-06 17:54:30,437 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 17:54:30,438 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 [2021-12-06 17:54:30,439 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:30,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 17:54:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-06 17:54:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-06 17:54:30,448 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2021-12-06 17:54:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:30,448 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-06 17:54:30,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-06 17:54:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 17:54:30,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:30,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:30,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:54:30,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2021-12-06 17:54:30,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:30,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002889581] [2021-12-06 17:54:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:30,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:31,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002889581] [2021-12-06 17:54:31,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002889581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:31,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747415845] [2021-12-06 17:54:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:31,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:31,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:31,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:54:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:31,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 17:54:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:31,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:54:31,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:31,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 23 [2021-12-06 17:54:31,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 17:54:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:31,955 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 17:54:31,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-12-06 17:54:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:32,143 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:32,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-12-06 17:54:32,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:32,373 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:32,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 46 [2021-12-06 17:54:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:32,596 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:32,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2021-12-06 17:54:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:32,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:32,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 48 [2021-12-06 17:54:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:33,147 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:33,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 19 [2021-12-06 17:54:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:33,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:41,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:41,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:41,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:41,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:41,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:41,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747415845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:41,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:41,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2021-12-06 17:54:41,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472853250] [2021-12-06 17:54:41,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:41,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 17:54:41,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 17:54:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1373, Unknown=2, NotChecked=0, Total=1640 [2021-12-06 17:54:41,310 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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) [2021-12-06 17:54:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:42,705 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-12-06 17:54:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:54:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 17:54:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:42,708 INFO L225 Difference]: With dead ends: 71 [2021-12-06 17:54:42,708 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 17:54:42,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=597, Invalid=2593, Unknown=2, NotChecked=0, Total=3192 [2021-12-06 17:54:42,710 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:42,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 122 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 168 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2021-12-06 17:54:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 17:54:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2021-12-06 17:54:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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) [2021-12-06 17:54:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-12-06 17:54:42,717 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2021-12-06 17:54:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:42,717 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-12-06 17:54:42,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 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) [2021-12-06 17:54:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-12-06 17:54:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:54:42,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:42,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:42,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:54:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 17:54:42,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2021-12-06 17:54:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156002713] [2021-12-06 17:54:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:42,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:54:43,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156002713] [2021-12-06 17:54:43,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156002713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087719626] [2021-12-06 17:54:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:54:43,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:43,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:43,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:54:43,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:54:43,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:54:43,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:54:43,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:54:43,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087719626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:43,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:43,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 17:54:43,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769413745] [2021-12-06 17:54:43,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:43,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:54:43,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:54:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:54:43,154 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:43,273 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-12-06 17:54:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:54:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 17:54:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:43,274 INFO L225 Difference]: With dead ends: 116 [2021-12-06 17:54:43,274 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 17:54:43,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:54:43,276 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:43,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 33 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 17:54:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-12-06 17:54:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 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) [2021-12-06 17:54:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-06 17:54:43,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 33 [2021-12-06 17:54:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:43,282 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-06 17:54:43,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-06 17:54:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 17:54:43,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:43,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:43,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:54:43,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:43,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash -284383476, now seen corresponding path program 3 times [2021-12-06 17:54:43,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:43,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254308716] [2021-12-06 17:54:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:43,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:54:43,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:43,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254308716] [2021-12-06 17:54:43,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254308716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:43,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221853833] [2021-12-06 17:54:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:54:43,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:43,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:43,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:54:43,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:54:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:54:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:54:43,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:54:43,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221853833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:43,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 17:54:43,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259276094] [2021-12-06 17:54:43,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:43,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:54:43,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:54:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:54:43,710 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2021-12-06 17:54:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:43,829 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-06 17:54:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:54:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 17:54:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:43,830 INFO L225 Difference]: With dead ends: 57 [2021-12-06 17:54:43,836 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 17:54:43,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:54:43,837 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:43,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 17:54:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-12-06 17:54:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-12-06 17:54:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-12-06 17:54:43,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2021-12-06 17:54:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:43,843 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-12-06 17:54:43,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2021-12-06 17:54:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-12-06 17:54:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:54:43,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:43,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:43,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:54:44,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:44,046 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2021-12-06 17:54:44,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134724040] [2021-12-06 17:54:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:44,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:46,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:46,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134724040] [2021-12-06 17:54:46,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134724040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:46,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143888432] [2021-12-06 17:54:46,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:54:46,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:46,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:46,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:46,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:54:46,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:54:46,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:54:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 17:54:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:46,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:46,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 17:54:46,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 28 [2021-12-06 17:54:46,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:54:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-12-06 17:54:46,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:46,934 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 28 treesize of output 30 [2021-12-06 17:54:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-06 17:54:47,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2021-12-06 17:54:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-12-06 17:54:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:47,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 74 [2021-12-06 17:54:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:48,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 86 [2021-12-06 17:54:48,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2021-12-06 17:54:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:48,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 86 [2021-12-06 17:54:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2021-12-06 17:54:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:54:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:49,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 86 [2021-12-06 17:54:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:50,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2021-12-06 17:54:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:51,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:51,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:54:51,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2021-12-06 17:54:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:51,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:55:02,024 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_344 Int) (v_ArrVal_342 Int) (v_ArrVal_340 Int) (v_ArrVal_339 Int) (v_ArrVal_337 Int) (v_ArrVal_347 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_337)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (< (+ v_ArrVal_342 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_342)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 4))) v_ArrVal_344) (< 1 v_ArrVal_337) (< (+ (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) v_ArrVal_339) (<= (+ v_ArrVal_347 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_347)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))) (* 3 c_~N~0)) (< (+ v_ArrVal_340 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_340)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) v_ArrVal_342) (< (+ v_ArrVal_339 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_339)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) v_ArrVal_340) (< (+ v_ArrVal_344 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_344)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)) v_ArrVal_347))))) is different from false [2021-12-06 17:57:50,086 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_ArrVal_335 Int) (v_ArrVal_344 Int) (v_ArrVal_332 Int) (v_ArrVal_342 Int) (v_ArrVal_330 Int) (v_ArrVal_340 Int) (v_ArrVal_328 Int) (v_ArrVal_339 Int) (v_ArrVal_337 Int) (v_ArrVal_347 Int)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4)) (.cse3 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 4))) (let ((.cse0 (let ((.cse4 (let ((.cse5 (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)) v_ArrVal_328)))) (store .cse5 |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| v_ArrVal_330) .cse3 v_ArrVal_332))))) (store .cse4 |c_ULTIMATE.start_main_~c~0#1.base| (store (store (select .cse4 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| v_ArrVal_335) .cse2 v_ArrVal_337))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (+ v_ArrVal_347 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_347)) |c_ULTIMATE.start_main_~c~0#1.base|) .cse2)) (* 3 ~N~0)) (< 1 v_ArrVal_335) (< (+ v_ArrVal_344 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_344)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)) v_ArrVal_347) (< 1 v_ArrVal_337) (< (+ v_ArrVal_339 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_339)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) v_ArrVal_340) (< (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_340)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_340) v_ArrVal_342) (< 1 v_ArrVal_328) (< (+ (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) v_ArrVal_339) (< (+ v_ArrVal_342 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_342)) |c_ULTIMATE.start_main_~b~0#1.base|) .cse3)) v_ArrVal_344) (< 1 v_ArrVal_330) (< 1 v_ArrVal_332)))))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-12-06 17:59:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 5 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 17:59:03,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143888432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:59:03,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:59:03,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 27] total 82 [2021-12-06 17:59:03,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283892612] [2021-12-06 17:59:03,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:59:03,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:59:03,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:59:03,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:59:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=5715, Unknown=81, NotChecked=314, Total=6642 [2021-12-06 17:59:03,115 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 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) [2021-12-06 18:00:42,493 WARN L227 SmtUtils]: Spent 30.67s on a formula simplification. DAG size of input: 136 DAG size of output: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:37,349 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:46,827 WARN L227 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:03:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:51,237 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2021-12-06 18:03:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:03:51,238 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 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 43 [2021-12-06 18:03:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:51,239 INFO L225 Difference]: With dead ends: 113 [2021-12-06 18:03:51,239 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 18:03:51,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 520.0s TimeCoverageRelationStatistics Valid=1254, Invalid=11486, Unknown=150, NotChecked=450, Total=13340 [2021-12-06 18:03:51,244 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:51,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 218 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 444 Invalid, 0 Unknown, 1113 Unchecked, 0.6s Time] [2021-12-06 18:03:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 18:03:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 87. [2021-12-06 18:03:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-12-06 18:03:51,256 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 43 [2021-12-06 18:03:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:51,256 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-12-06 18:03:51,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 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) [2021-12-06 18:03:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-12-06 18:03:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:03:51,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:51,257 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:51,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:03:51,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:51,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:03:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash -313453870, now seen corresponding path program 5 times [2021-12-06 18:03:51,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:03:51,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175522295] [2021-12-06 18:03:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:03:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:03:51,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:03:51,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175522295] [2021-12-06 18:03:51,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175522295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:51,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512229935] [2021-12-06 18:03:51,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:03:51,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:03:51,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:03:51,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:03:51,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:03:51,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:03:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:03:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:03:51,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:03:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:03:51,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512229935] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:03:51,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:03:51,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 18:03:51,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551575505] [2021-12-06 18:03:51,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:03:51,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:03:51,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:03:51,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:03:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:03:51,879 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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) [2021-12-06 18:03:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:52,271 INFO L93 Difference]: Finished difference Result 156 states and 181 transitions. [2021-12-06 18:03:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:03:52,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 18:03:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:52,272 INFO L225 Difference]: With dead ends: 156 [2021-12-06 18:03:52,272 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 18:03:52,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:03:52,273 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 172 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:52,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 52 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:03:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 18:03:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2021-12-06 18:03:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 states have internal predecessors, (61), 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) [2021-12-06 18:03:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-12-06 18:03:52,280 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 45 [2021-12-06 18:03:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:52,280 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-12-06 18:03:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 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) [2021-12-06 18:03:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-12-06 18:03:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:03:52,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:52,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:52,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:03:52,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:52,483 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:03:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1101638372, now seen corresponding path program 6 times [2021-12-06 18:03:52,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:03:52,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848381822] [2021-12-06 18:03:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:52,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:03:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:56,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:03:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848381822] [2021-12-06 18:03:56,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848381822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414675193] [2021-12-06 18:03:56,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:03:56,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:03:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:03:56,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:03:56,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:03:57,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 18:03:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:03:57,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 18:03:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:57,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:03:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:57,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:57,119 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 18:03:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 41 treesize of output 35 [2021-12-06 18:03:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-12-06 18:03:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:57,428 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 35 treesize of output 37 [2021-12-06 18:03:57,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:57,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:57,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 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 [2021-12-06 18:03:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2021-12-06 18:03:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,459 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-06 18:03:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 72 [2021-12-06 18:03:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:58,832 INFO L354 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2021-12-06 18:03:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 87 [2021-12-06 18:03:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:59,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 95 [2021-12-06 18:04:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 105 [2021-12-06 18:04:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:00,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 115 [2021-12-06 18:04:01,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 123 [2021-12-06 18:04:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:01,718 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-06 18:04:01,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 134 [2021-12-06 18:04:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:02,316 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-12-06 18:04:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 17 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 141 [2021-12-06 18:04:03,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:03,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 15 disjoint index pairs (out of 78 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 132 [2021-12-06 18:04:04,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:04,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 129 [2021-12-06 18:04:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:05,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 127 [2021-12-06 18:04:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 128 [2021-12-06 18:04:07,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:07,878 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-06 18:04:07,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 140 [2021-12-06 18:04:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:09,099 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-12-06 18:04:09,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 17 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 146 [2021-12-06 18:04:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:14,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 43 [2021-12-06 18:04:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:15,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:07:02,185 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-06 18:07:02,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-06 18:07:02,186 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-06 18:07:02,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:07:02,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-12-06 18:07:02,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854173572] [2021-12-06 18:07:02,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 18:07:02,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 18:07:02,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:07:02,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 18:07:02,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=10405, Unknown=55, NotChecked=0, Total=11342 [2021-12-06 18:07:02,190 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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) [2021-12-06 18:07:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:07:02,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4832 ImplicationChecksByTransitivity, 156.4s TimeCoverageRelationStatistics Valid=882, Invalid=10405, Unknown=55, NotChecked=0, Total=11342 [2021-12-06 18:07:02,194 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 [2021-12-06 18:07:02,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:07:02,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 18:07:02,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:07:02,397 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e4ebd0d at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 18:07:02,408 INFO L158 Benchmark]: Toolchain (without parser) took 752979.87ms. Allocated memory was 90.2MB in the beginning and 195.0MB in the end (delta: 104.9MB). Free memory was 53.9MB in the beginning and 111.0MB in the end (delta: -57.1MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2021-12-06 18:07:02,408 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 90.2MB. Free memory is still 70.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:07:02,409 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.53ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 53.7MB in the beginning and 109.0MB in the end (delta: -55.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-12-06 18:07:02,410 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.95ms. Allocated memory is still 134.2MB. Free memory was 109.0MB in the beginning and 107.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:07:02,411 INFO L158 Benchmark]: Boogie Preprocessor took 20.79ms. Allocated memory is still 134.2MB. Free memory was 107.3MB in the beginning and 106.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:07:02,412 INFO L158 Benchmark]: RCFGBuilder took 278.48ms. Allocated memory is still 134.2MB. Free memory was 105.7MB in the beginning and 93.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 18:07:02,413 INFO L158 Benchmark]: TraceAbstraction took 752440.33ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 93.5MB in the beginning and 111.0MB in the end (delta: -17.5MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. [2021-12-06 18:07:02,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 90.2MB. Free memory is still 70.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.53ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 53.7MB in the beginning and 109.0MB in the end (delta: -55.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.95ms. Allocated memory is still 134.2MB. Free memory was 109.0MB in the beginning and 107.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.79ms. Allocated memory is still 134.2MB. Free memory was 107.3MB in the beginning and 106.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 278.48ms. Allocated memory is still 134.2MB. Free memory was 105.7MB in the beginning and 93.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 752440.33ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 93.5MB in the beginning and 111.0MB in the end (delta: -17.5MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e4ebd0d de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e4ebd0d: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:07:03,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:07:03,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:07:03,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:07:03,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:07:03,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:07:03,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:07:03,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:07:03,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:07:03,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:07:03,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:07:03,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:07:03,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:07:03,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:07:03,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:07:03,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:07:03,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:07:03,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:07:03,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:07:03,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:07:03,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:07:03,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:07:03,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:07:03,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:07:03,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:07:03,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:07:03,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:07:03,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:07:03,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:07:03,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:07:03,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:07:03,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:07:03,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:07:03,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:07:03,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:07:03,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:07:03,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:07:03,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:07:03,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:07:03,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:07:03,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:07:03,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 18:07:03,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:07:03,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:07:03,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:07:03,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:07:03,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:07:03,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:07:03,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:07:03,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:07:03,816 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:07:03,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:07:03,816 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:07:03,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 18:07:03,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:07:03,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:07:03,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:07:03,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:07:03,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:07:03,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:07:03,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:07:03,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:07:03,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:07:03,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:07:03,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 18:07:03,820 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2021-12-06 18:07:04,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:07:04,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:07:04,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:07:04,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:07:04,080 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:07:04,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/res2o.c [2021-12-06 18:07:04,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/d34b158ea/a7a6e3f9889b48a1bd3cad3ebe1c4ffe/FLAG11a20aab0 [2021-12-06 18:07:04,504 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:07:04,504 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/sv-benchmarks/c/array-fpi/res2o.c [2021-12-06 18:07:04,509 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/d34b158ea/a7a6e3f9889b48a1bd3cad3ebe1c4ffe/FLAG11a20aab0 [2021-12-06 18:07:04,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/data/d34b158ea/a7a6e3f9889b48a1bd3cad3ebe1c4ffe [2021-12-06 18:07:04,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:07:04,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:07:04,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:07:04,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:07:04,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:07:04,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbf6600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04, skipping insertion in model container [2021-12-06 18:07:04,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:07:04,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:07:04,640 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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2021-12-06 18:07:04,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:07:04,665 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:07:04,684 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_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2021-12-06 18:07:04,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:07:04,714 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:07:04,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04 WrapperNode [2021-12-06 18:07:04,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:07:04,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:07:04,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:07:04,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:07:04,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,744 INFO L137 Inliner]: procedures = 21, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 112 [2021-12-06 18:07:04,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:07:04,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:07:04,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:07:04,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:07:04,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:07:04,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:07:04,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:07:04,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:07:04,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (1/1) ... [2021-12-06 18:07:04,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:07:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:07:04,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:07:04,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 18:07:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:07:04,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:07:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-12-06 18:07:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:07:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:07:04,891 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:07:04,893 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:07:05,072 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:07:05,078 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:07:05,079 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 18:07:05,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:07:05 BoogieIcfgContainer [2021-12-06 18:07:05,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:07:05,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:07:05,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:07:05,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:07:05,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:07:04" (1/3) ... [2021-12-06 18:07:05,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3167e33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:07:05, skipping insertion in model container [2021-12-06 18:07:05,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:07:04" (2/3) ... [2021-12-06 18:07:05,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3167e33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:07:05, skipping insertion in model container [2021-12-06 18:07:05,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:07:05" (3/3) ... [2021-12-06 18:07:05,089 INFO L111 eAbstractionObserver]: Analyzing ICFG res2o.c [2021-12-06 18:07:05,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:07:05,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:07:05,147 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:07:05,153 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 [2021-12-06 18:07:05,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:07:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:07:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:07:05,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:07:05,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:07:05,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:07:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:07:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2021-12-06 18:07:05,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:07:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434556572] [2021-12-06 18:07:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:07:05,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:07:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:07:05,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:07:05,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:07:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:07:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:07:05,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:07:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:07:05,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:07:05,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:07:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434556572] [2021-12-06 18:07:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434556572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:07:05,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:07:05,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:07:05,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952164770] [2021-12-06 18:07:05,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:07:05,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:07:05,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:07:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:07:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:07:05,356 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-06 18:07:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:07:05,368 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2021-12-06 18:07:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:07:05,370 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:07:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:07:05,375 INFO L225 Difference]: With dead ends: 56 [2021-12-06 18:07:05,375 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 18:07:05,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:07:05,380 INFO L933 BasicCegarLoop]: 36 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, 36 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 [2021-12-06 18:07:05,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:07:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 18:07:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 18:07:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-12-06 18:07:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-06 18:07:05,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2021-12-06 18:07:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:07:05,405 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-06 18:07:05,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-06 18:07:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-06 18:07:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:07:05,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:07:05,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:07:05,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:07:05,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:07:05,609 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:07:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:07:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2021-12-06 18:07:05,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:07:05,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703372314] [2021-12-06 18:07:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:07:05,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:07:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:07:05,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:07:05,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:07:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:07:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:07:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:07:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:07:05,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:07:05,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:07:05,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703372314] [2021-12-06 18:07:05,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703372314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:07:05,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:07:05,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:07:05,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544875874] [2021-12-06 18:07:05,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:07:05,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:07:05,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:07:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:07:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:07:05,926 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-12-06 18:07:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:07:06,069 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-06 18:07:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:07:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:07:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:07:06,071 INFO L225 Difference]: With dead ends: 57 [2021-12-06 18:07:06,071 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 18:07:06,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:07:06,073 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:07:06,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:07:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 18:07:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-06 18:07:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:07:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-06 18:07:06,079 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2021-12-06 18:07:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:07:06,080 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-06 18:07:06,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-12-06 18:07:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-06 18:07:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:07:06,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:07:06,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:07:06,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 18:07:06,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:07:06,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:07:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:07:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2021-12-06 18:07:06,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:07:06,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076379080] [2021-12-06 18:07:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:07:06,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:07:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:07:06,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:07:06,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:07:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:07:06,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:07:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:07:06,732 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 18:07:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 623 treesize of output 609 [2021-12-06 18:07:07,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:07:07,032 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-12-06 18:07:07,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:07:07,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:07:07,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 18:07:08,062 INFO L354 Elim1Store]: treesize reduction 46, result has 43.2 percent of original size [2021-12-06 18:07:08,063 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 3 case distinctions, treesize of input 35 treesize of output 58 [2021-12-06 18:07:08,709 INFO L354 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2021-12-06 18:07:08,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 68 [2021-12-06 18:07:09,690 INFO L354 Elim1Store]: treesize reduction 214, result has 17.7 percent of original size [2021-12-06 18:07:09,690 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 5 new quantified variables, introduced 9 case distinctions, treesize of input 94 treesize of output 83 [2021-12-06 18:07:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:10,289 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-12-06 18:07:10,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 77 [2021-12-06 18:07:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:11,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:11,232 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-12-06 18:07:11,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 101 [2021-12-06 18:07:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:12,068 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:07:12,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 126 [2021-12-06 18:07:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:07:12,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:08:03,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,654 INFO L244 Elim1Store]: Index analysis took 282 ms [2021-12-06 18:08:04,791 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 18:08:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 177 treesize of output 169 [2021-12-06 18:08:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,886 INFO L354 Elim1Store]: treesize reduction 24, result has 64.2 percent of original size [2021-12-06 18:08:04,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 6574 treesize of output 1336 [2021-12-06 18:08:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:08:04,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1336 treesize of output 1266 [2021-12-06 18:08:04,948 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:08:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1952 treesize of output 1946 [2021-12-06 18:08:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:08:07,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:08:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076379080] [2021-12-06 18:08:07,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076379080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:08:07,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:08:07,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-12-06 18:08:07,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153985650] [2021-12-06 18:08:07,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:08:07,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:08:07,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:08:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:08:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:08:07,095 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 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) [2021-12-06 18:08:32,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:08:34,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 18:09:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:14,216 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-12-06 18:09:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 18:09:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 18:09:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:14,218 INFO L225 Difference]: With dead ends: 82 [2021-12-06 18:09:14,218 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 18:09:14,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 105.7s TimeCoverageRelationStatistics Valid=275, Invalid=1527, Unknown=4, NotChecked=0, Total=1806 [2021-12-06 18:09:14,220 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:14,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 202 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 121 Unchecked, 14.8s Time] [2021-12-06 18:09:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 18:09:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-12-06 18:09:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 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) [2021-12-06 18:09:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-06 18:09:14,230 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 31 [2021-12-06 18:09:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:14,231 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-06 18:09:14,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 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) [2021-12-06 18:09:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-06 18:09:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 18:09:14,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:14,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:14,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:09:14,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:09:14,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2021-12-06 18:09:14,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:09:14,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713257539] [2021-12-06 18:09:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:09:14,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:09:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:09:14,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:09:14,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:09:14,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:09:14,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:09:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:09:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:09:14,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:09:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:09:14,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:09:14,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713257539] [2021-12-06 18:09:14,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713257539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:09:14,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:09:14,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-06 18:09:14,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493915737] [2021-12-06 18:09:14,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:09:14,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:09:14,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:09:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:09:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:09:14,995 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2021-12-06 18:09:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:15,692 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2021-12-06 18:09:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:09:15,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 33 [2021-12-06 18:09:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:15,694 INFO L225 Difference]: With dead ends: 138 [2021-12-06 18:09:15,694 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 18:09:15,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:09:15,695 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:15,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 30 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:09:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 18:09:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-12-06 18:09:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 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) [2021-12-06 18:09:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-12-06 18:09:15,703 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 33 [2021-12-06 18:09:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-12-06 18:09:15,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2021-12-06 18:09:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-12-06 18:09:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 18:09:15,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:15,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:15,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 18:09:15,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:09:15,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash 447877832, now seen corresponding path program 3 times [2021-12-06 18:09:15,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:09:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776938246] [2021-12-06 18:09:15,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:09:15,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:09:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:09:15,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:09:15,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:09:16,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:09:16,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:09:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:09:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:09:16,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:09:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:09:16,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:09:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776938246] [2021-12-06 18:09:16,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776938246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:09:16,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:09:16,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-12-06 18:09:16,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126600333] [2021-12-06 18:09:16,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:09:16,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:09:16,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:09:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:09:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:09:16,558 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2021-12-06 18:09:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:17,556 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2021-12-06 18:09:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:09:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 35 [2021-12-06 18:09:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:17,558 INFO L225 Difference]: With dead ends: 140 [2021-12-06 18:09:17,558 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 18:09:17,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:09:17,559 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 341 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:17,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 29 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:09:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 18:09:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-12-06 18:09:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 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) [2021-12-06 18:09:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-06 18:09:17,568 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 35 [2021-12-06 18:09:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:17,568 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-06 18:09:17,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2021-12-06 18:09:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-06 18:09:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:09:17,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:17,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:17,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 18:09:17,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:09:17,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2021-12-06 18:09:17,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:09:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287902864] [2021-12-06 18:09:17,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:09:17,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:09:17,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:09:17,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:09:17,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d505e0d-b710-47b1-8dd9-9e7e217e5c99/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:09:18,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:09:18,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:09:18,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 18:09:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:18,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:09:18,190 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-12-06 18:09:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:09:18,226 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 18:09:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 389 treesize of output 379 [2021-12-06 18:09:18,659 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:09:18,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 18:09:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:19,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:09:19,107 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 1 case distinctions, treesize of input 44 treesize of output 49 [2021-12-06 18:09:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,086 INFO L354 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2021-12-06 18:09:20,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 82 [2021-12-06 18:09:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,809 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-12-06 18:09:20,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 74 [2021-12-06 18:09:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:21,809 INFO L354 Elim1Store]: treesize reduction 110, result has 28.1 percent of original size [2021-12-06 18:09:21,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 64 treesize of output 104 [2021-12-06 18:09:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:22,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:22,772 INFO L354 Elim1Store]: treesize reduction 144, result has 15.8 percent of original size [2021-12-06 18:09:22,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 69 treesize of output 96 [2021-12-06 18:09:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:24,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:09:24,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:24,269 INFO L354 Elim1Store]: treesize reduction 442, result has 13.3 percent of original size [2021-12-06 18:09:24,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 127