./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_3.c --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_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/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_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/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_ab70c2fe-e391-479b-9456-d501851b318d/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 e63f4150318242871d0ac34a0d1b61fbf23907ae ........................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/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_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/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_ab70c2fe-e391-479b-9456-d501851b318d/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 e63f4150318242871d0ac34a0d1b61fbf23907ae .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:14:25,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:14:25,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:14:25,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:14:25,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:14:25,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:14:25,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:14:25,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:14:25,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:14:25,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:14:25,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:14:25,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:14:25,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:14:25,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:14:25,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:14:25,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:14:25,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:14:25,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:14:25,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:14:25,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:14:25,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:14:25,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:14:25,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:14:25,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:14:25,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:14:25,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:14:25,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:14:25,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:14:25,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:14:25,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:14:25,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:14:25,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:14:25,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:14:25,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:14:25,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:14:25,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:14:25,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:14:25,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:14:25,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:14:25,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:14:25,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:14:25,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:14:25,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:14:25,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:14:25,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:14:25,709 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:14:25,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:14:25,709 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:14:25,709 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:14:25,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:14:25,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:14:25,710 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:14:25,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:14:25,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:14:25,711 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:14:25,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:14:25,711 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:14:25,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:14:25,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:14:25,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:14:25,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:14:25,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:14:25,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:14:25,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:14:25,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:14:25,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:14:25,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:14:25,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:14:25,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:14:25,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:14:25,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:14:25,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:14:25,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:25,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:14:25,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:14:25,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:14:25,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:14:25,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:14:25,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:14:25,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:14:25,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:14:25,717 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_ab70c2fe-e391-479b-9456-d501851b318d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e63f4150318242871d0ac34a0d1b61fbf23907ae [2021-10-16 02:14:25,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:14:25,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:14:25,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:14:25,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:14:25,980 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:14:25,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-simple/nested_3.c [2021-10-16 02:14:26,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/2ee521c2f/ccaf7ec3e041494faff26e042a810425/FLAG63e02ef68 [2021-10-16 02:14:26,459 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:14:26,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/sv-benchmarks/c/loop-simple/nested_3.c [2021-10-16 02:14:26,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/2ee521c2f/ccaf7ec3e041494faff26e042a810425/FLAG63e02ef68 [2021-10-16 02:14:26,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/2ee521c2f/ccaf7ec3e041494faff26e042a810425 [2021-10-16 02:14:26,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:14:26,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:14:26,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:26,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:14:26,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:14:26,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:26" (1/1) ... [2021-10-16 02:14:26,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3fd260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:26, skipping insertion in model container [2021-10-16 02:14:26,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:26" (1/1) ... [2021-10-16 02:14:26,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:14:26,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:14:27,017 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_ab70c2fe-e391-479b-9456-d501851b318d/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-10-16 02:14:27,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:27,047 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:14:27,076 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_ab70c2fe-e391-479b-9456-d501851b318d/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-10-16 02:14:27,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:27,089 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:14:27,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27 WrapperNode [2021-10-16 02:14:27,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:27,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:27,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:14:27,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:14:27,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:27,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:14:27,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:14:27,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:14:27,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:14:27,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:14:27,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:14:27,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:14:27,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (1/1) ... [2021-10-16 02:14:27,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:27,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:27,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:14:27,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:14:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:14:27,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:14:27,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:14:27,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:14:27,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:14:27,417 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:14:27,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:27 BoogieIcfgContainer [2021-10-16 02:14:27,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:14:27,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:14:27,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:14:27,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:14:27,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:14:26" (1/3) ... [2021-10-16 02:14:27,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634f18b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:27, skipping insertion in model container [2021-10-16 02:14:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:27" (2/3) ... [2021-10-16 02:14:27,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634f18b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:27, skipping insertion in model container [2021-10-16 02:14:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:27" (3/3) ... [2021-10-16 02:14:27,427 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2021-10-16 02:14:27,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:14:27,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:14:27,479 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:14:27,486 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 02:14:27,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:14:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 02:14:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:14:27,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:27,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:14:27,506 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:27,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2587396, now seen corresponding path program 1 times [2021-10-16 02:14:27,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:27,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118387051] [2021-10-16 02:14:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:27,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:27,709 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 02:14:27,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:27,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118387051] [2021-10-16 02:14:27,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118387051] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:27,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:27,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:14:27,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262608074] [2021-10-16 02:14:27,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:27,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:27,747 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 02:14:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:27,778 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-10-16 02:14:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-16 02:14:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:27,787 INFO L225 Difference]: With dead ends: 17 [2021-10-16 02:14:27,787 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 02:14:27,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 02:14:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2021-10-16 02:14:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 02:14:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-10-16 02:14:27,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2021-10-16 02:14:27,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:27,846 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-10-16 02:14:27,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 02:14:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-10-16 02:14:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:14:27,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:27,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:14:27,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:14:27,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1850411630, now seen corresponding path program 1 times [2021-10-16 02:14:27,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:27,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463216220] [2021-10-16 02:14:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:27,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:27,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:27,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463216220] [2021-10-16 02:14:27,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463216220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:27,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:27,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:14:27,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738382412] [2021-10-16 02:14:27,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:27,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:27,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:27,907 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 02:14:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:27,934 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2021-10-16 02:14:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-10-16 02:14:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:27,936 INFO L225 Difference]: With dead ends: 16 [2021-10-16 02:14:27,936 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 02:14:27,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 02:14:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-10-16 02:14:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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 02:14:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-10-16 02:14:27,940 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2021-10-16 02:14:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:27,941 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-16 02:14:27,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 02:14:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-10-16 02:14:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:14:27,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:27,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:27,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:14:27,943 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1329143110, now seen corresponding path program 1 times [2021-10-16 02:14:27,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:27,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591712283] [2021-10-16 02:14:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:27,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:27,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:27,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591712283] [2021-10-16 02:14:27,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591712283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:27,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:27,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:14:27,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655804276] [2021-10-16 02:14:27,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:27,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:27,998 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 02:14:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:28,014 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2021-10-16 02:14:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 02:14:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:28,017 INFO L225 Difference]: With dead ends: 17 [2021-10-16 02:14:28,018 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 02:14:28,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 02:14:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-16 02:14:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 02:14:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-16 02:14:28,023 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2021-10-16 02:14:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:28,024 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-16 02:14:28,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 02:14:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-16 02:14:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:14:28,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:28,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:28,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:14:28,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:28,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1572747232, now seen corresponding path program 1 times [2021-10-16 02:14:28,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:28,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650993784] [2021-10-16 02:14:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:28,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:28,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:28,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650993784] [2021-10-16 02:14:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650993784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:14:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48902346] [2021-10-16 02:14:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:28,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:28,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:14:28,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:14:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:14:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:28,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48902346] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:28,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694019213] [2021-10-16 02:14:28,348 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 02:14:28,348 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:14:28,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:14:28,367 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:14:28,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:14:28,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,425 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:14:28,425 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,426 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:14:28,434 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:14:28,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:14:28,445 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-10-16 02:14:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:28,555 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:14:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:14:28,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:14:28,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:14:28,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:14:28,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:14:28,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:28,661 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-10-16 02:14:28,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:14:28,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:125, output treesize:109 [2021-10-16 02:14:28,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-16 02:14:28,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:28,864 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| 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 02:14:28,869 INFO L168 Benchmark]: Toolchain (without parser) took 1999.09 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 61.7 MB in the beginning and 92.7 MB in the end (delta: -31.1 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:28,869 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 92.3 MB. Free memory is still 46.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:14:28,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.35 ms. Allocated memory is still 92.3 MB. Free memory was 61.5 MB in the beginning and 69.7 MB in the end (delta: -8.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:28,870 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.78 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 68.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:14:28,871 INFO L168 Benchmark]: Boogie Preprocessor took 19.19 ms. Allocated memory is still 92.3 MB. Free memory was 68.3 MB in the beginning and 67.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:28,871 INFO L168 Benchmark]: RCFGBuilder took 277.80 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 56.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:28,872 INFO L168 Benchmark]: TraceAbstraction took 1446.20 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 56.2 MB in the beginning and 92.7 MB in the end (delta: -36.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:28,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 92.3 MB. Free memory is still 46.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 220.35 ms. Allocated memory is still 92.3 MB. Free memory was 61.5 MB in the beginning and 69.7 MB in the end (delta: -8.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.78 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 68.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.19 ms. Allocated memory is still 92.3 MB. Free memory was 68.3 MB in the beginning and 67.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 277.80 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 56.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1446.20 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 56.2 MB in the beginning and 92.7 MB in the end (delta: -36.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: 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 02:14:28,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/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 02:14:31,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:14:31,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:14:31,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:14:31,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:14:31,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:14:31,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:14:31,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:14:31,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:14:31,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:14:31,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:14:31,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:14:31,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:14:31,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:14:31,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:14:31,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:14:31,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:14:31,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:14:31,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:14:31,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:14:31,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:14:31,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:14:31,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:14:31,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:14:31,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:14:31,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:14:31,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:14:31,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:14:31,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:14:31,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:14:31,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:14:31,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:14:31,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:14:31,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:14:31,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:14:31,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:14:31,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:14:31,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:14:31,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:14:31,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:14:31,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:14:31,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:14:31,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:14:31,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:14:31,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:14:31,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:14:31,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:14:31,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:14:31,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:14:31,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:14:31,398 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:14:31,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:14:31,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:14:31,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:14:31,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:14:31,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:14:31,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:14:31,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:14:31,402 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:14:31,402 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:14:31,402 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:14:31,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:14:31,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:14:31,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:14:31,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:14:31,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:14:31,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:14:31,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:14:31,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:31,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:14:31,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:14:31,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:14:31,405 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:14:31,405 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:31,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:14:31,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:14:31,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:14:31,407 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_ab70c2fe-e391-479b-9456-d501851b318d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e63f4150318242871d0ac34a0d1b61fbf23907ae [2021-10-16 02:14:31,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:14:31,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:14:31,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:14:31,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:14:31,833 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:14:31,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-simple/nested_3.c [2021-10-16 02:14:31,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/e6ea36934/ede8ee5da2e049e0a4cee0442b2a27f1/FLAG7c4b99d6e [2021-10-16 02:14:32,392 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:14:32,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/sv-benchmarks/c/loop-simple/nested_3.c [2021-10-16 02:14:32,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/e6ea36934/ede8ee5da2e049e0a4cee0442b2a27f1/FLAG7c4b99d6e [2021-10-16 02:14:32,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/data/e6ea36934/ede8ee5da2e049e0a4cee0442b2a27f1 [2021-10-16 02:14:32,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:14:32,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:14:32,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:32,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:14:32,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:14:32,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:32,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d340074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32, skipping insertion in model container [2021-10-16 02:14:32,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:32,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:14:32,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:14:32,929 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_ab70c2fe-e391-479b-9456-d501851b318d/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-10-16 02:14:32,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:32,945 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:14:32,960 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_ab70c2fe-e391-479b-9456-d501851b318d/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-10-16 02:14:32,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:32,974 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:14:32,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32 WrapperNode [2021-10-16 02:14:32,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:32,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:32,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:14:32,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:14:32,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:32,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:33,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:14:33,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:14:33,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:14:33,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:14:33,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:14:33,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:14:33,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:14:33,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (1/1) ... [2021-10-16 02:14:33,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:33,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:14:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:14:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:14:33,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:14:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:14:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:14:33,412 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:14:33,421 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:14:33,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:33 BoogieIcfgContainer [2021-10-16 02:14:33,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:14:33,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:14:33,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:14:33,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:14:33,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:14:32" (1/3) ... [2021-10-16 02:14:33,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2feb6c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:33, skipping insertion in model container [2021-10-16 02:14:33,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:32" (2/3) ... [2021-10-16 02:14:33,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2feb6c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:33, skipping insertion in model container [2021-10-16 02:14:33,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:33" (3/3) ... [2021-10-16 02:14:33,442 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2021-10-16 02:14:33,447 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:14:33,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:14:33,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:14:33,534 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 02:14:33,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:14:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 02:14:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:14:33,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:33,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:14:33,554 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2021-10-16 02:14:33,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:33,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52862645] [2021-10-16 02:14:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:33,579 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:33,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:33,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:14:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:14:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:33,746 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 02:14:33,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:33,770 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 02:14:33,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:33,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52862645] [2021-10-16 02:14:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52862645] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:33,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:33,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:14:33,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526377752] [2021-10-16 02:14:33,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:14:33,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:14:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:14:33,809 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 02:14:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:33,821 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-10-16 02:14:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:14:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-16 02:14:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:33,828 INFO L225 Difference]: With dead ends: 28 [2021-10-16 02:14:33,828 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:14:33,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:14:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:14:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:14:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 02:14:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-16 02:14:33,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2021-10-16 02:14:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:33,859 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-16 02:14:33,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 02:14:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-16 02:14:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:14:33,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:33,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:14:33,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:34,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:34,073 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2021-10-16 02:14:34,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:34,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778793155] [2021-10-16 02:14:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:34,084 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:34,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:34,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:14:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:34,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:14:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:34,191 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 02:14:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:34,240 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 02:14:34,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:34,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778793155] [2021-10-16 02:14:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778793155] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:34,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:34,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:14:34,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107137535] [2021-10-16 02:14:34,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:34,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:34,247 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:14:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:34,280 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-10-16 02:14:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:34,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 5 [2021-10-16 02:14:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:34,282 INFO L225 Difference]: With dead ends: 21 [2021-10-16 02:14:34,282 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 02:14:34,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 02:14:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 02:14:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 02:14:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-10-16 02:14:34,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 5 [2021-10-16 02:14:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:34,289 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-10-16 02:14:34,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:14:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-10-16 02:14:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:14:34,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:34,291 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:14:34,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 02:14:34,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:34,505 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1150914650, now seen corresponding path program 1 times [2021-10-16 02:14:34,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:34,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789665815] [2021-10-16 02:14:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:34,507 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:34,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:34,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:14:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:34,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:14:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:14:34,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:14:34,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:34,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789665815] [2021-10-16 02:14:34,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789665815] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:34,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:34,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:14:34,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618061202] [2021-10-16 02:14:34,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:34,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:34,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:34,697 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 02:14:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:34,735 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-10-16 02:14:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:14:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:34,737 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:14:34,737 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 02:14:34,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 02:14:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-16 02:14:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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 02:14:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-16 02:14:34,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-10-16 02:14:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:34,758 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-16 02:14:34,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 02:14:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-16 02:14:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:14:34,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:34,760 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:14:34,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 02:14:34,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:34,974 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 257922470, now seen corresponding path program 1 times [2021-10-16 02:14:34,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:34,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844153178] [2021-10-16 02:14:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:34,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:34,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:14:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:35,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:14:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:14:35,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:14:35,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:35,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844153178] [2021-10-16 02:14:35,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844153178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:35,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:35,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:14:35,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679022671] [2021-10-16 02:14:35,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:35,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:35,168 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 02:14:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:35,212 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-10-16 02:14:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 23 [2021-10-16 02:14:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:35,213 INFO L225 Difference]: With dead ends: 62 [2021-10-16 02:14:35,214 INFO L226 Difference]: Without dead ends: 40 [2021-10-16 02:14:35,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-16 02:14:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-16 02:14:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 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 02:14:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-10-16 02:14:35,227 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 23 [2021-10-16 02:14:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:35,227 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-10-16 02:14:35,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 02:14:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-10-16 02:14:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 02:14:35,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:35,229 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:14:35,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:35,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:35,441 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1078341030, now seen corresponding path program 1 times [2021-10-16 02:14:35,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:35,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229455268] [2021-10-16 02:14:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:35,442 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:35,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:35,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:14:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:35,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-16 02:14:35,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-16 02:14:35,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:35,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229455268] [2021-10-16 02:14:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229455268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:35,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1876315454] [2021-10-16 02:14:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:35,876 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:35,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:14:35,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:14:35,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:14:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-16 02:14:36,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-16 02:14:36,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1876315454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:36,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240823282] [2021-10-16 02:14:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:36,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:36,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:36,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:14:36,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:14:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:36,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-16 02:14:36,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-16 02:14:36,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240823282] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:36,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:14:36,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-10-16 02:14:36,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409574913] [2021-10-16 02:14:36,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:14:36,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:14:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:14:36,829 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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 02:14:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:38,207 INFO L93 Difference]: Finished difference Result 235 states and 310 transitions. [2021-10-16 02:14:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-16 02:14:38,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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 02:14:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:38,214 INFO L225 Difference]: With dead ends: 235 [2021-10-16 02:14:38,215 INFO L226 Difference]: Without dead ends: 204 [2021-10-16 02:14:38,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1150.9ms TimeCoverageRelationStatistics Valid=689, Invalid=1963, Unknown=0, NotChecked=0, Total=2652 [2021-10-16 02:14:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-16 02:14:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-10-16 02:14:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0935960591133005) internal successors, (222), 203 states have internal predecessors, (222), 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 02:14:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2021-10-16 02:14:38,250 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 39 [2021-10-16 02:14:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:38,250 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2021-10-16 02:14:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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 02:14:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2021-10-16 02:14:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-16 02:14:38,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:38,274 INFO L512 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-16 02:14:38,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:38,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-16 02:14:38,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:38,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:38,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 914362278, now seen corresponding path program 2 times [2021-10-16 02:14:38,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:38,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464510957] [2021-10-16 02:14:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:14:38,887 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:38,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:38,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:38,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:14:39,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:14:39,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:14:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 1771 proven. 89 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-10-16 02:14:39,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 1771 proven. 89 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-10-16 02:14:40,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464510957] [2021-10-16 02:14:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464510957] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:40,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1781546344] [2021-10-16 02:14:40,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:14:40,158 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:40,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:14:40,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:14:40,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:14:40,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:14:40,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:14:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 1771 proven. 89 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-10-16 02:14:41,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 1771 proven. 89 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-10-16 02:14:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1781546344] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:41,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208713383] [2021-10-16 02:14:41,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:14:41,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:41,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:14:41,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:14:42,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:14:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:14:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 1771 proven. 89 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-10-16 02:14:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6297 backedges. 1771 proven. 89 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-10-16 02:14:43,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208713383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:43,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:14:43,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-16 02:14:43,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628244965] [2021-10-16 02:14:43,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:14:43,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:14:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:14:43,035 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:43,151 INFO L93 Difference]: Finished difference Result 734 states and 815 transitions. [2021-10-16 02:14:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:14:43,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-10-16 02:14:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:43,161 INFO L225 Difference]: With dead ends: 734 [2021-10-16 02:14:43,161 INFO L226 Difference]: Without dead ends: 564 [2021-10-16 02:14:43,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1214 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:14:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-10-16 02:14:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-10-16 02:14:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.0763765541740675) internal successors, (606), 563 states have internal predecessors, (606), 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 02:14:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 606 transitions. [2021-10-16 02:14:43,252 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 606 transitions. Word has length 203 [2021-10-16 02:14:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:43,254 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 606 transitions. [2021-10-16 02:14:43,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 606 transitions. [2021-10-16 02:14:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2021-10-16 02:14:43,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:43,284 INFO L512 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-16 02:14:43,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:43,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-16 02:14:43,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:43,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:14:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:43,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1072389210, now seen corresponding path program 3 times [2021-10-16 02:14:43,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:43,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331324009] [2021-10-16 02:14:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:14:43,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:43,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:14:44,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-10-16 02:14:44,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:14:44,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:14:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 16183 proven. 0 refuted. 0 times theorem prover too weak. 40190 trivial. 0 not checked. [2021-10-16 02:14:46,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 15736 proven. 447 refuted. 0 times theorem prover too weak. 40190 trivial. 0 not checked. [2021-10-16 02:14:48,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:48,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331324009] [2021-10-16 02:14:48,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331324009] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:14:48,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:14:48,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 19 [2021-10-16 02:14:48,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910606329] [2021-10-16 02:14:48,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 02:14:48,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 02:14:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:14:48,884 INFO L87 Difference]: Start difference. First operand 564 states and 606 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:49,124 INFO L93 Difference]: Finished difference Result 564 states and 606 transitions. [2021-10-16 02:14:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:14:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 563 [2021-10-16 02:14:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:49,127 INFO L225 Difference]: With dead ends: 564 [2021-10-16 02:14:49,128 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:14:49,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 1106 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 872.3ms TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:14:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:14:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:14:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 02:14:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:14:49,131 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 563 [2021-10-16 02:14:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:49,131 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:14:49,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:14:49,132 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:14:49,134 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:14:49,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:49,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:49,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:14:49,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:14:49,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:14:49,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:14:49,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:14:49,756 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:14:49,756 INFO L860 garLoopResultBuilder]: At program point L31(lines 15 32) the Hoare annotation is: true [2021-10-16 02:14:49,757 INFO L857 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-10-16 02:14:49,757 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2021-10-16 02:14:49,757 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~b~0 (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv6 32)) (bvslt ULTIMATE.start_main_~a~0 (_ bv6 32))) [2021-10-16 02:14:49,757 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2021-10-16 02:14:49,757 INFO L853 garLoopResultBuilder]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (not (bvslt ULTIMATE.start_main_~b~0 (_ bv6 32))) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~a~0) (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~b~0) (_ bv6 32)) (not (bvslt ULTIMATE.start_main_~c~0 (_ bv6 32)))) [2021-10-16 02:14:49,757 INFO L857 garLoopResultBuilder]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2021-10-16 02:14:49,757 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:14:49,758 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:14:49,758 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:14:49,758 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2021-10-16 02:14:49,758 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2021-10-16 02:14:49,758 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2021-10-16 02:14:49,758 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 26) the Hoare annotation is: (and (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv6 32)) (bvslt ULTIMATE.start_main_~a~0 (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~b~0) (_ bv6 32)) (not (bvslt ULTIMATE.start_main_~c~0 (_ bv6 32)))) [2021-10-16 02:14:49,762 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:14:49,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:14:49 BoogieIcfgContainer [2021-10-16 02:14:49,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:14:49,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:14:49,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:14:49,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:14:49,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:33" (3/4) ... [2021-10-16 02:14:49,793 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:14:49,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 02:14:49,803 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-16 02:14:49,803 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:14:49,803 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:14:49,841 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:14:49,842 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:14:49,843 INFO L168 Benchmark]: Toolchain (without parser) took 17076.57 ms. Allocated memory was 71.3 MB in the beginning and 125.8 MB in the end (delta: 54.5 MB). Free memory was 51.7 MB in the beginning and 35.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 71.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,844 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 71.3 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:14:49,844 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.61 ms. Allocated memory is still 71.3 MB. Free memory was 51.6 MB in the beginning and 41.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,845 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.06 ms. Allocated memory is still 71.3 MB. Free memory was 41.8 MB in the beginning and 54.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,845 INFO L168 Benchmark]: Boogie Preprocessor took 46.53 ms. Allocated memory is still 71.3 MB. Free memory was 54.2 MB in the beginning and 53.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,846 INFO L168 Benchmark]: RCFGBuilder took 353.21 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 43.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,846 INFO L168 Benchmark]: TraceAbstraction took 16362.52 ms. Allocated memory was 71.3 MB in the beginning and 125.8 MB in the end (delta: 54.5 MB). Free memory was 43.0 MB in the beginning and 37.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,847 INFO L168 Benchmark]: Witness Printer took 54.43 ms. Allocated memory is still 125.8 MB. Free memory was 37.8 MB in the beginning and 35.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:49,849 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 71.3 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 206.61 ms. Allocated memory is still 71.3 MB. Free memory was 51.6 MB in the beginning and 41.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.06 ms. Allocated memory is still 71.3 MB. Free memory was 41.8 MB in the beginning and 54.2 MB in the end (delta: -12.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.53 ms. Allocated memory is still 71.3 MB. Free memory was 54.2 MB in the beginning and 53.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 353.21 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 43.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16362.52 ms. Allocated memory was 71.3 MB in the beginning and 125.8 MB in the end (delta: 54.5 MB). Free memory was 43.0 MB in the beginning and 37.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 68.5 MB. Max. memory is 16.1 GB. * Witness Printer took 54.43 ms. Allocated memory is still 125.8 MB. Free memory was 37.8 MB in the beginning and 35.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16236.6ms, OverallIterations: 7, TraceHistogramMax: 216, EmptinessCheckTime: 57.3ms, AutomataDifference: 1935.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 407.7ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 86 SDtfs, 167 SDslu, 155 SDs, 0 SdLazy, 323 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 394.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2689 GetRequests, 2604 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2113.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred in iteration=6, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 172.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 55 HoareAnnotationTreeSize, 4 FomulaSimplifications, 7088 FormulaSimplificationTreeSizeReduction, 347.4ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 53.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 197.8ms SsaConstructionTime, 929.9ms SatisfiabilityAnalysisTime, 8614.0ms InterpolantComputationTime, 1333 NumberOfCodeBlocks, 909 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2644 ConstructedInterpolants, 0 QuantifiedInterpolants, 4791 SizeOfPredicates, 14 NumberOfNonLiveVariables, 1243 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 22 InterpolantComputations, 9 PerfectInterpolantSequences, 150179/151314 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((!~bvslt32(b, 6bv32) && ~bvslt32(~bvadd64(4294967295bv32, c), 6bv32)) && ~bvslt32(~bvadd64(4294967295bv32, a), 6bv32)) && ~bvslt32(~bvadd64(4294967295bv32, b), 6bv32)) && !~bvslt32(c, 6bv32) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (~bvslt32(b, 6bv32) && ~bvslt32(~bvadd64(4294967295bv32, c), 6bv32)) && ~bvslt32(a, 6bv32) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((~bvslt32(~bvadd64(4294967295bv32, c), 6bv32) && ~bvslt32(a, 6bv32)) && ~bvslt32(~bvadd64(4294967295bv32, b), 6bv32)) && !~bvslt32(c, 6bv32) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:14:49,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab70c2fe-e391-479b-9456-d501851b318d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...