./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bbcd29b379466a58e055ac550736cd77ce56d9c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bbcd29b379466a58e055ac550736cd77ce56d9c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 01:54:46,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:54:46,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:54:46,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:54:46,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:54:46,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:54:46,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:54:46,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:54:46,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:54:46,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:54:46,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:54:46,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:54:46,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:54:46,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:54:46,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:54:46,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:54:46,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:54:46,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:54:46,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:54:46,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:54:46,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:54:46,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:54:46,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:54:46,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:54:46,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:54:46,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:54:46,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:54:46,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:54:46,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:54:46,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:54:46,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:54:46,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:54:46,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:54:46,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:54:46,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:54:46,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:54:46,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:54:46,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:54:46,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:54:46,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:54:46,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:54:46,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 01:54:46,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:54:46,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:54:46,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:54:46,766 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:54:46,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:54:46,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:54:46,767 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 01:54:46,767 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:54:46,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:54:46,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 01:54:46,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 01:54:46,769 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:54:46,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 01:54:46,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 01:54:46,769 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 01:54:46,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:54:46,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:54:46,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 01:54:46,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:54:46,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:54:46,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:54:46,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:54:46,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:54:46,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:54:46,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:54:46,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:54:46,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:54:46,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:54:46,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:54:46,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:54:46,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:46,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:54:46,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:54:46,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:54:46,776 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 01:54:46,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 01:54:46,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:54:46,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:54:46,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:54:46,777 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-10-16 01:54:47,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:54:47,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:54:47,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:54:47,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:54:47,132 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:54:47,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-16 01:54:47,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/7b9801010/3e3a3d5c4d934f68a67698f17aaf0ddb/FLAG10e5ce49b [2021-10-16 01:54:47,687 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:54:47,687 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-16 01:54:47,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/7b9801010/3e3a3d5c4d934f68a67698f17aaf0ddb/FLAG10e5ce49b [2021-10-16 01:54:48,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/7b9801010/3e3a3d5c4d934f68a67698f17aaf0ddb [2021-10-16 01:54:48,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:54:48,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:54:48,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:48,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:54:48,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:54:48,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697c5846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48, skipping insertion in model container [2021-10-16 01:54:48,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:54:48,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:54:48,377 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-16 01:54:48,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:48,398 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:54:48,422 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-16 01:54:48,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:48,438 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:54:48,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48 WrapperNode [2021-10-16 01:54:48,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:48,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:48,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:54:48,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:54:48,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:48,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:54:48,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:54:48,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:54:48,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:54:48,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:54:48,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:54:48,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:54:48,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (1/1) ... [2021-10-16 01:54:48,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:48,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:48,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:54:48,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:54:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 01:54:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:54:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 01:54:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:54:48,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:54:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 01:54:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 01:54:49,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:54:49,160 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 01:54:49,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:49 BoogieIcfgContainer [2021-10-16 01:54:49,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:54:49,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:54:49,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:54:49,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:54:49,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:54:48" (1/3) ... [2021-10-16 01:54:49,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cec602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:49, skipping insertion in model container [2021-10-16 01:54:49,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:48" (2/3) ... [2021-10-16 01:54:49,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cec602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:49, skipping insertion in model container [2021-10-16 01:54:49,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:49" (3/3) ... [2021-10-16 01:54:49,180 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-10-16 01:54:49,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:54:49,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 01:54:49,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:54:49,274 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 01:54:49,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 01:54:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 01:54:49,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:49,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:49,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:49,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1624531970, now seen corresponding path program 1 times [2021-10-16 01:54:49,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:49,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231001423] [2021-10-16 01:54:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:49,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:49,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 01:54:49,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445701069] [2021-10-16 01:54:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:49,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:49,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:49,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 01:54:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:54:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:49,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:49,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:49,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231001423] [2021-10-16 01:54:49,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 01:54:49,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445701069] [2021-10-16 01:54:49,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445701069] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:49,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:49,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 01:54:49,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499678742] [2021-10-16 01:54:49,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:49,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:49,722 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:49,746 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2021-10-16 01:54:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:49,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 8 [2021-10-16 01:54:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:49,756 INFO L225 Difference]: With dead ends: 22 [2021-10-16 01:54:49,756 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 01:54:49,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 01:54:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 01:54:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-16 01:54:49,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-10-16 01:54:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:49,790 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-16 01:54:49,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-16 01:54:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 01:54:49,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:49,791 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:49,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:50,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 01:54:50,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash -132988094, now seen corresponding path program 1 times [2021-10-16 01:54:50,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:50,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277103227] [2021-10-16 01:54:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:50,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:50,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 01:54:50,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546170554] [2021-10-16 01:54:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:50,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:50,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:50,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:50,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 01:54:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:54:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 01:54:50,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 01:54:50,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:50,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277103227] [2021-10-16 01:54:50,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 01:54:50,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546170554] [2021-10-16 01:54:50,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546170554] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:50,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:50,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 01:54:50,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030356940] [2021-10-16 01:54:50,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:50,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:50,239 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:50,287 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-10-16 01:54:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 01:54:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:50,295 INFO L225 Difference]: With dead ends: 23 [2021-10-16 01:54:50,296 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 01:54:50,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 01:54:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-16 01:54:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-16 01:54:50,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-10-16 01:54:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:50,307 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-16 01:54:50,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-16 01:54:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 01:54:50,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:50,310 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:50,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:50,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:50,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1151414046, now seen corresponding path program 1 times [2021-10-16 01:54:50,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:50,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936824300] [2021-10-16 01:54:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:50,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:50,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 01:54:50,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531797951] [2021-10-16 01:54:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:50,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:50,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:50,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 01:54:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:54:50,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 01:54:50,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 01:54:50,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:50,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936824300] [2021-10-16 01:54:50,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 01:54:50,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531797951] [2021-10-16 01:54:50,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531797951] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:50,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:50,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 01:54:50,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950787702] [2021-10-16 01:54:50,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:50,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:50,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:50,770 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:50,788 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-16 01:54:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16 [2021-10-16 01:54:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:50,789 INFO L225 Difference]: With dead ends: 25 [2021-10-16 01:54:50,790 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 01:54:50,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 01:54:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-16 01:54:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-16 01:54:50,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2021-10-16 01:54:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:50,803 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-16 01:54:50,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-16 01:54:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 01:54:50,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:50,805 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:50,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:51,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:51,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2095232066, now seen corresponding path program 1 times [2021-10-16 01:54:51,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:51,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667356320] [2021-10-16 01:54:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:51,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:51,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 01:54:51,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236479487] [2021-10-16 01:54:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:51,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:51,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:51,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 01:54:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:54:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 01:54:51,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 01:54:51,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:51,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667356320] [2021-10-16 01:54:51,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 01:54:51,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236479487] [2021-10-16 01:54:51,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236479487] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:54:51,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242469889] [2021-10-16 01:54:51,320 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 01:54:51,321 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 01:54:51,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 01:54:51,333 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 01:54:51,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 01:54:51,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,391 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:54:51,392 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,393 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 01:54:51,395 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 01:54:51,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 01:54:51,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-16 01:54:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:54:51,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:54:51,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 01:54:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 01:54:51,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 01:54:51,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 01:54:51,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 01:54:51,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 01:54:51,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 01:54:51,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-16 01:54:51,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 01:54:51,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:131, output treesize:134 [2021-10-16 01:54:51,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-16 01:54:51,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:51,749 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_23| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-16 01:54:51,752 INFO L168 Benchmark]: Toolchain (without parser) took 3691.71 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 58.6 MB in the beginning and 102.9 MB in the end (delta: -44.4 MB). Peak memory consumption was 45.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:51,753 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 74.8 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:54:51,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.90 ms. Allocated memory is still 100.7 MB. Free memory was 58.3 MB in the beginning and 74.7 MB in the end (delta: -16.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:51,754 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.38 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 72.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:51,754 INFO L168 Benchmark]: Boogie Preprocessor took 30.58 ms. Allocated memory is still 100.7 MB. Free memory was 72.7 MB in the beginning and 71.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:51,755 INFO L168 Benchmark]: RCFGBuilder took 648.71 ms. Allocated memory is still 100.7 MB. Free memory was 71.2 MB in the beginning and 49.9 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:51,755 INFO L168 Benchmark]: TraceAbstraction took 2587.07 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 49.3 MB in the beginning and 102.9 MB in the end (delta: -53.6 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:54:51,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory was 74.8 MB in the beginning and 74.8 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 376.90 ms. Allocated memory is still 100.7 MB. Free memory was 58.3 MB in the beginning and 74.7 MB in the end (delta: -16.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.38 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 72.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.58 ms. Allocated memory is still 100.7 MB. Free memory was 72.7 MB in the beginning and 71.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 648.71 ms. Allocated memory is still 100.7 MB. Free memory was 71.2 MB in the beginning and 49.9 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2587.07 ms. Allocated memory was 100.7 MB in the beginning and 130.0 MB in the end (delta: 29.4 MB). Free memory was 49.3 MB in the beginning and 102.9 MB in the end (delta: -53.6 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_23| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_23|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 01:54:51,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 01:54:54,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:54:54,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:54:54,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:54:54,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:54:54,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:54:54,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:54:54,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:54:54,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:54:54,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:54:54,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:54:54,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:54:54,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:54:54,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:54:54,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:54:54,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:54:54,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:54:54,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:54:54,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:54:54,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:54:54,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:54:54,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:54:54,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:54:54,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:54:54,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:54:54,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:54:54,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:54:54,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:54:54,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:54:54,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:54:54,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:54:54,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:54:54,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:54:54,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:54:54,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:54:54,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:54:54,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:54:54,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:54:54,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:54:54,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:54:54,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:54:54,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 01:54:54,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:54:54,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:54:54,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:54:54,395 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:54:54,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:54:54,396 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:54:54,396 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:54:54,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:54:54,396 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:54:54,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:54:54,399 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:54:54,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:54:54,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:54:54,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:54:54,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:54:54,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:54:54,400 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:54:54,400 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 01:54:54,400 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 01:54:54,401 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:54:54,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:54:54,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:54:54,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:54:54,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:54:54,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 01:54:54,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:54:54,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:54,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:54:54,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:54:54,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:54:54,403 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 01:54:54,403 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 01:54:54,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:54:54,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:54:54,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:54:54,405 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_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-10-16 01:54:54,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:54:54,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:54:54,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:54:54,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:54:54,821 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:54:54,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-16 01:54:54,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/8ef6b123c/b5b89745a9344789a0362e4be5c60c3d/FLAG9edca5110 [2021-10-16 01:54:55,510 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:54:55,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-16 01:54:55,518 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/8ef6b123c/b5b89745a9344789a0362e4be5c60c3d/FLAG9edca5110 [2021-10-16 01:54:55,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/data/8ef6b123c/b5b89745a9344789a0362e4be5c60c3d [2021-10-16 01:54:55,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:54:55,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:54:55,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:55,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:54:55,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:54:55,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:55" (1/1) ... [2021-10-16 01:54:55,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27bec691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:55, skipping insertion in model container [2021-10-16 01:54:55,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:55" (1/1) ... [2021-10-16 01:54:55,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:54:55,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:54:56,063 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-16 01:54:56,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:56,076 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:54:56,107 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-16 01:54:56,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:56,135 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:54:56,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56 WrapperNode [2021-10-16 01:54:56,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:56,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:56,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:54:56,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:54:56,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:56,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:54:56,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:54:56,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:54:56,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:54:56,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:54:56,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:54:56,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:54:56,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (1/1) ... [2021-10-16 01:54:56,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:56,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:56,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:54:56,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:54:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 01:54:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:54:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 01:54:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:54:56,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:54:56,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 01:54:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 01:54:57,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:54:57,382 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 01:54:57,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:57 BoogieIcfgContainer [2021-10-16 01:54:57,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:54:57,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:54:57,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:54:57,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:54:57,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:54:55" (1/3) ... [2021-10-16 01:54:57,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157ed7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:57, skipping insertion in model container [2021-10-16 01:54:57,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:56" (2/3) ... [2021-10-16 01:54:57,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157ed7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:57, skipping insertion in model container [2021-10-16 01:54:57,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:57" (3/3) ... [2021-10-16 01:54:57,393 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-10-16 01:54:57,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:54:57,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 01:54:57,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:54:57,511 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 01:54:57,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 01:54:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 01:54:57,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:57,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:57,559 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-16 01:54:57,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:54:57,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662213552] [2021-10-16 01:54:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:57,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:54:57,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:54:57,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:54:57,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 01:54:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 01:54:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:58,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:58,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:54:58,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662213552] [2021-10-16 01:54:58,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662213552] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:58,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:58,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 01:54:58,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590638385] [2021-10-16 01:54:58,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 01:54:58,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:54:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 01:54:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 01:54:58,162 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:58,192 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-10-16 01:54:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 01:54:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 01:54:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:58,203 INFO L225 Difference]: With dead ends: 56 [2021-10-16 01:54:58,204 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 01:54:58,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 01:54:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 01:54:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 01:54:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-10-16 01:54:58,246 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-10-16 01:54:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-10-16 01:54:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-16 01:54:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 01:54:58,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:58,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:58,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:54:58,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:54:58,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-10-16 01:54:58,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:54:58,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971926573] [2021-10-16 01:54:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:58,464 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:54:58,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:54:58,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:54:58,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 01:54:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:54:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:59,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:54:59,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971926573] [2021-10-16 01:54:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971926573] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:59,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:59,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 01:54:59,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960111339] [2021-10-16 01:54:59,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:59,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:54:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:59,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:59,012 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:59,050 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-10-16 01:54:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:59,051 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 17 [2021-10-16 01:54:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:59,053 INFO L225 Difference]: With dead ends: 51 [2021-10-16 01:54:59,054 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 01:54:59,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 01:54:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-16 01:54:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-16 01:54:59,065 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2021-10-16 01:54:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:59,065 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-16 01:54:59,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-16 01:54:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 01:54:59,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:59,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:59,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 01:54:59,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:54:59,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -790773651, now seen corresponding path program 1 times [2021-10-16 01:54:59,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:54:59,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031407460] [2021-10-16 01:54:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:59,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:54:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:54:59,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:54:59,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 01:54:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:59,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:54:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:59,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:54:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031407460] [2021-10-16 01:54:59,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031407460] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:54:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1882045810] [2021-10-16 01:54:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:59,903 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:54:59,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:54:59,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:54:59,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 01:55:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:55:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:55:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:55:00,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1882045810] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:00,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 01:55:00,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-10-16 01:55:00,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049209054] [2021-10-16 01:55:00,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:00,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:00,183 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:00,616 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-10-16 01:55:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 21 [2021-10-16 01:55:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:00,618 INFO L225 Difference]: With dead ends: 67 [2021-10-16 01:55:00,618 INFO L226 Difference]: Without dead ends: 50 [2021-10-16 01:55:00,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-16 01:55:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-16 01:55:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 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) [2021-10-16 01:55:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-16 01:55:00,626 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 21 [2021-10-16 01:55:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:00,627 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-16 01:55:00,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-10-16 01:55:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 01:55:00,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:00,628 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:00,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-16 01:55:00,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:01,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:55:01,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:01,031 INFO L82 PathProgramCache]: Analyzing trace with hash -532548631, now seen corresponding path program 1 times [2021-10-16 01:55:01,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:01,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647420141] [2021-10-16 01:55:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:01,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:01,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:01,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 01:55:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:01,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:01,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:01,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647420141] [2021-10-16 01:55:01,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647420141] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:01,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [201290835] [2021-10-16 01:55:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:01,378 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:01,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:01,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:01,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 01:55:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:01,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:01,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:01,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [201290835] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:01,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141735079] [2021-10-16 01:55:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:01,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:01,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 01:55:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:01,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 01:55:01,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:55:02,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:55:02,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141735079] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:02,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 01:55:02,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 16 [2021-10-16 01:55:02,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305421115] [2021-10-16 01:55:02,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 01:55:02,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 01:55:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-16 01:55:02,485 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:03,084 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-16 01:55:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 01:55:03,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 01:55:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:03,088 INFO L225 Difference]: With dead ends: 98 [2021-10-16 01:55:03,088 INFO L226 Difference]: Without dead ends: 93 [2021-10-16 01:55:03,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-16 01:55:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-16 01:55:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-10-16 01:55:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2021-10-16 01:55:03,101 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 21 [2021-10-16 01:55:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:03,102 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2021-10-16 01:55:03,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2021-10-16 01:55:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 01:55:03,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:03,103 INFO L512 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] [2021-10-16 01:55:03,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:03,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:03,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:03,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:03,706 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -781348630, now seen corresponding path program 1 times [2021-10-16 01:55:03,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:03,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064328353] [2021-10-16 01:55:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:03,708 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:03,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:03,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:03,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 01:55:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 01:55:04,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 01:55:04,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:04,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064328353] [2021-10-16 01:55:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064328353] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:04,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1924995871] [2021-10-16 01:55:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:04,246 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:04,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:04,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 01:55:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:04,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:04,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 01:55:04,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 01:55:04,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1924995871] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:04,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885767342] [2021-10-16 01:55:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:04,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:04,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:04,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 01:55:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:55:05,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 01:55:05,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 01:55:05,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885767342] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:05,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 01:55:05,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-10-16 01:55:05,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047801706] [2021-10-16 01:55:05,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:55:05,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:55:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 01:55:05,500 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:05,610 INFO L93 Difference]: Finished difference Result 131 states and 191 transitions. [2021-10-16 01:55:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:55:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 01:55:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:05,614 INFO L225 Difference]: With dead ends: 131 [2021-10-16 01:55:05,614 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 01:55:05,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 01:55:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 01:55:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-16 01:55:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-10-16 01:55:05,627 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 24 [2021-10-16 01:55:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:05,627 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-10-16 01:55:05,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-10-16 01:55:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 01:55:05,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:05,630 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:05,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:05,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:06,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:06,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:06,238 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash -358269621, now seen corresponding path program 1 times [2021-10-16 01:55:06,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:06,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975956438] [2021-10-16 01:55:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:06,239 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:06,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:06,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 01:55:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 01:55:06,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 01:55:06,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:06,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975956438] [2021-10-16 01:55:06,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975956438] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:06,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087476335] [2021-10-16 01:55:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:06,920 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:06,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:06,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:06,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 01:55:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:55:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 01:55:07,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 01:55:07,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087476335] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:07,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303987740] [2021-10-16 01:55:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:07,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:07,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:07,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 01:55:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:55:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 01:55:08,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 01:55:08,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303987740] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:08,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:55:08,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-10-16 01:55:08,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377919932] [2021-10-16 01:55:08,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 01:55:08,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 01:55:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-16 01:55:08,378 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:09,836 INFO L93 Difference]: Finished difference Result 243 states and 337 transitions. [2021-10-16 01:55:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 01:55:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-16 01:55:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:09,844 INFO L225 Difference]: With dead ends: 243 [2021-10-16 01:55:09,844 INFO L226 Difference]: Without dead ends: 171 [2021-10-16 01:55:09,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-16 01:55:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-16 01:55:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 123. [2021-10-16 01:55:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.4098360655737705) internal successors, (172), 122 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2021-10-16 01:55:09,861 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 39 [2021-10-16 01:55:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2021-10-16 01:55:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2021-10-16 01:55:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-16 01:55:09,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:09,865 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-10-16 01:55:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:10,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:10,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:10,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:10,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1487247229, now seen corresponding path program 1 times [2021-10-16 01:55:10,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:10,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96825009] [2021-10-16 01:55:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:10,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:10,484 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:10,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 01:55:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:10,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:55:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 01:55:11,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 01:55:11,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:11,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96825009] [2021-10-16 01:55:11,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96825009] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:11,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565794598] [2021-10-16 01:55:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:11,300 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:11,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:11,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 01:55:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:55:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 01:55:12,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 01:55:12,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [565794598] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:12,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589397647] [2021-10-16 01:55:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:12,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:12,978 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:12,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 01:55:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 01:55:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 01:55:14,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 01:55:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589397647] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:14,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 01:55:14,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4, 4, 4] total 8 [2021-10-16 01:55:14,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668177431] [2021-10-16 01:55:14,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:55:14,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:55:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:14,147 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:14,178 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2021-10-16 01:55:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:55:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-16 01:55:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:14,181 INFO L225 Difference]: With dead ends: 165 [2021-10-16 01:55:14,181 INFO L226 Difference]: Without dead ends: 129 [2021-10-16 01:55:14,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-16 01:55:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-16 01:55:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.390625) internal successors, (178), 128 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-10-16 01:55:14,195 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 45 [2021-10-16 01:55:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:14,196 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-10-16 01:55:14,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-10-16 01:55:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-16 01:55:14,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:14,199 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-10-16 01:55:14,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:14,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-16 01:55:14,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 01:55:14,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:55:14,826 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:14,827 INFO L82 PathProgramCache]: Analyzing trace with hash -34042881, now seen corresponding path program 1 times [2021-10-16 01:55:14,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:14,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996448217] [2021-10-16 01:55:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:14,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:14,828 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:14,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 01:55:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:55:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 01:55:15,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 01:55:15,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:15,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996448217] [2021-10-16 01:55:15,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996448217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:15,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [470597778] [2021-10-16 01:55:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:15,701 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:15,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:15,727 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:15,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 01:55:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 01:55:17,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 01:55:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 01:55:17,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [470597778] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:17,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447651561] [2021-10-16 01:55:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:17,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:17,505 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:17,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 01:55:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 01:55:18,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 01:55:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447651561] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:18,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:55:18,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 8 [2021-10-16 01:55:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565951292] [2021-10-16 01:55:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 01:55:18,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 01:55:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:18,810 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:19,024 INFO L93 Difference]: Finished difference Result 276 states and 385 transitions. [2021-10-16 01:55:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 01:55:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-16 01:55:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:19,025 INFO L225 Difference]: With dead ends: 276 [2021-10-16 01:55:19,025 INFO L226 Difference]: Without dead ends: 168 [2021-10-16 01:55:19,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-16 01:55:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-10-16 01:55:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3333333333333333) internal successors, (200), 150 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2021-10-16 01:55:19,041 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 49 [2021-10-16 01:55:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:19,042 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2021-10-16 01:55:19,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2021-10-16 01:55:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-16 01:55:19,045 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:19,045 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:19,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-16 01:55:19,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:19,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:19,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:19,666 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1982630665, now seen corresponding path program 1 times [2021-10-16 01:55:19,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:19,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870546651] [2021-10-16 01:55:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:19,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:19,669 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:19,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 01:55:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:55:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 01:55:20,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 01:55:20,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:20,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870546651] [2021-10-16 01:55:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870546651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:20,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052493499] [2021-10-16 01:55:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:20,593 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:20,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:20,602 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:20,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 01:55:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 01:55:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 01:55:21,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 01:55:21,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052493499] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:21,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333575643] [2021-10-16 01:55:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:21,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:21,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:21,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 01:55:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 01:55:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 01:55:22,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-16 01:55:22,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333575643] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:22,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-16 01:55:22,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6, 6] total 10 [2021-10-16 01:55:22,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063132974] [2021-10-16 01:55:22,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:55:22,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:55:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-16 01:55:22,893 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:23,060 INFO L93 Difference]: Finished difference Result 295 states and 399 transitions. [2021-10-16 01:55:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:55:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-16 01:55:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:23,062 INFO L225 Difference]: With dead ends: 295 [2021-10-16 01:55:23,062 INFO L226 Difference]: Without dead ends: 181 [2021-10-16 01:55:23,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 01:55:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-16 01:55:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 166. [2021-10-16 01:55:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2484848484848485) internal successors, (206), 165 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-10-16 01:55:23,077 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 61 [2021-10-16 01:55:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:23,078 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-10-16 01:55:23,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-10-16 01:55:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-16 01:55:23,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:23,082 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:23,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:23,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-16 01:55:23,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:23,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:23,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1179928735, now seen corresponding path program 2 times [2021-10-16 01:55:23,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:23,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282599671] [2021-10-16 01:55:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:55:23,699 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:23,700 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:23,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 01:55:24,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:55:24,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:55:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 01:55:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 01:55:24,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 01:55:25,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:25,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282599671] [2021-10-16 01:55:25,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282599671] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:25,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477014586] [2021-10-16 01:55:25,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:55:25,264 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:25,265 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:25,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-16 01:55:27,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:55:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:55:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 01:55:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 01:55:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 01:55:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1477014586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724949519] [2021-10-16 01:55:28,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 01:55:28,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:28,355 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-16 01:55:30,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 01:55:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:55:30,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 01:55:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 01:55:30,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 01:55:31,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724949519] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:31,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:55:31,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-10-16 01:55:31,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116173682] [2021-10-16 01:55:31,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 01:55:31,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 01:55:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-10-16 01:55:31,030 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:31,881 INFO L93 Difference]: Finished difference Result 383 states and 500 transitions. [2021-10-16 01:55:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 01:55:31,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 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 67 [2021-10-16 01:55:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:31,883 INFO L225 Difference]: With dead ends: 383 [2021-10-16 01:55:31,883 INFO L226 Difference]: Without dead ends: 239 [2021-10-16 01:55:31,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-10-16 01:55:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-16 01:55:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-10-16 01:55:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1105263157894736) internal successors, (211), 190 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-10-16 01:55:31,901 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 67 [2021-10-16 01:55:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:31,902 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-10-16 01:55:31,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-10-16 01:55:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-16 01:55:31,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:31,905 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:31,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-16 01:55:32,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:32,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-16 01:55:32,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:32,516 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2021-10-16 01:55:32,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:32,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588883628] [2021-10-16 01:55:32,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 01:55:32,517 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:32,518 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:32,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 01:55:33,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 01:55:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:55:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-16 01:55:33,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-16 01:55:34,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 01:55:34,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588883628] [2021-10-16 01:55:34,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588883628] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:34,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366130739] [2021-10-16 01:55:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 01:55:34,157 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 01:55:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 01:55:34,158 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 01:55:34,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 01:55:38,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 01:55:38,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:55:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-16 01:55:38,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-16 01:55:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [366130739] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:38,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229606065] [2021-10-16 01:55:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 01:55:38,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:38,532 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:38,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-16 01:55:40,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 01:55:40,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 01:55:40,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 01:55:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-16 01:55:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-16 01:55:41,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229606065] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 01:55:41,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 01:55:41,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 01:55:41,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763491821] [2021-10-16 01:55:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 01:55:41,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 01:55:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 01:55:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:41,206 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:41,299 INFO L93 Difference]: Finished difference Result 264 states and 293 transitions. [2021-10-16 01:55:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 01:55:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-16 01:55:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:41,302 INFO L225 Difference]: With dead ends: 264 [2021-10-16 01:55:41,302 INFO L226 Difference]: Without dead ends: 199 [2021-10-16 01:55:41,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-16 01:55:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-10-16 01:55:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.106060606060606) internal successors, (219), 198 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 219 transitions. [2021-10-16 01:55:41,320 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 219 transitions. Word has length 76 [2021-10-16 01:55:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:41,321 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 219 transitions. [2021-10-16 01:55:41,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 219 transitions. [2021-10-16 01:55:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-16 01:55:41,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:41,322 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:41,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:41,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:41,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-16 01:55:41,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:41,934 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 4 times [2021-10-16 01:55:41,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 01:55:41,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716236537] [2021-10-16 01:55:41,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 01:55:41,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 01:55:41,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 01:55:41,936 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 01:55:41,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 01:55:43,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 01:55:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 01:55:43,442 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 01:55:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 01:55:44,833 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 01:55:44,833 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 01:55:44,834 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 01:55:44,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:45,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 01:55:45,063 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 01:55:45,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:55:45 BoogieIcfgContainer [2021-10-16 01:55:45,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 01:55:45,191 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 01:55:45,191 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 01:55:45,191 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 01:55:45,191 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:57" (3/4) ... [2021-10-16 01:55:45,193 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 01:55:45,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 01:55:45,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 01:55:45,334 INFO L168 Benchmark]: Toolchain (without parser) took 49449.97 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.6 MB in the beginning and 20.1 MB in the end (delta: 17.5 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:45,334 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory is still 39.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:55:45,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.26 ms. Allocated memory is still 58.7 MB. Free memory was 37.4 MB in the beginning and 40.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:45,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.31 ms. Allocated memory is still 58.7 MB. Free memory was 40.4 MB in the beginning and 38.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:55:45,336 INFO L168 Benchmark]: Boogie Preprocessor took 45.71 ms. Allocated memory is still 58.7 MB. Free memory was 38.6 MB in the beginning and 37.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:45,337 INFO L168 Benchmark]: RCFGBuilder took 1160.87 ms. Allocated memory is still 58.7 MB. Free memory was 37.0 MB in the beginning and 24.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:45,337 INFO L168 Benchmark]: TraceAbstraction took 47804.03 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 24.2 MB in the beginning and 21.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:45,337 INFO L168 Benchmark]: Witness Printer took 141.60 ms. Allocated memory is still 73.4 MB. Free memory was 21.2 MB in the beginning and 20.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:45,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 58.7 MB. Free memory is still 39.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.26 ms. Allocated memory is still 58.7 MB. Free memory was 37.4 MB in the beginning and 40.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.31 ms. Allocated memory is still 58.7 MB. Free memory was 40.4 MB in the beginning and 38.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.71 ms. Allocated memory is still 58.7 MB. Free memory was 38.6 MB in the beginning and 37.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1160.87 ms. Allocated memory is still 58.7 MB. Free memory was 37.0 MB in the beginning and 24.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47804.03 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 24.2 MB in the beginning and 21.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. * Witness Printer took 141.60 ms. Allocated memory is still 73.4 MB. Free memory was 21.2 MB in the beginning and 20.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47563.0ms, OverallIterations: 12, TraceHistogramMax: 5, EmptinessCheckTime: 47.6ms, AutomataDifference: 4106.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 350 SDtfs, 604 SDslu, 939 SDs, 0 SdLazy, 667 SolverSat, 265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2770.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2401 GetRequests, 2309 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1755.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=11, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 157.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 171 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 356.1ms SsaConstructionTime, 17595.8ms SatisfiabilityAnalysisTime, 10370.5ms InterpolantComputationTime, 1302 NumberOfCodeBlocks, 1203 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2388 ConstructedInterpolants, 0 QuantifiedInterpolants, 3481 SizeOfPredicates, 28 NumberOfNonLiveVariables, 2821 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 56 InterpolantComputations, 13 PerfectInterpolantSequences, 2216/2512 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 01:55:45,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b897fcec-a0c1-4ab3-951d-6cbe9a00ca18/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...