./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/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_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/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_02f37b76-0061-4641-b431-5d9e9f1d9e34/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 6c00c1225dae238bedea18c737f72ae44fea020a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/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_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/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_02f37b76-0061-4641-b431-5d9e9f1d9e34/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 6c00c1225dae238bedea18c737f72ae44fea020a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:25:15,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:25:15,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:25:15,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:25:15,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:25:15,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:25:15,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:25:15,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:25:15,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:25:15,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:25:15,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:25:15,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:25:15,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:25:15,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:25:15,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:25:15,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:25:15,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:25:15,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:25:15,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:25:15,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:25:15,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:25:15,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:25:15,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:25:15,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:25:15,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:25:15,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:25:15,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:25:15,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:25:15,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:25:15,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:25:15,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:25:15,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:25:15,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:25:15,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:25:15,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:25:15,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:25:15,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:25:15,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:25:15,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:25:15,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:25:15,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:25:15,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:25:15,729 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:25:15,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:25:15,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:25:15,731 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:25:15,731 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:25:15,731 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:25:15,731 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:25:15,732 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:25:15,732 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:25:15,732 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:25:15,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:25:15,732 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:25:15,733 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:25:15,733 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:25:15,733 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:25:15,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:25:15,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:25:15,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:25:15,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:25:15,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:25:15,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:25:15,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:25:15,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:25:15,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:25:15,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:25:15,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:25:15,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:25:15,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:25:15,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:25:15,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:25:15,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:25:15,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:25:15,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:25:15,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:25:15,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:25:15,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:25:15,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:25:15,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:25:15,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:25:15,739 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2021-10-16 02:25:16,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:25:16,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:25:16,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:25:16,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:25:16,108 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:25:16,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-16 02:25:16,173 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/98aff0437/e54cd98809e54f6394e7b422a10240b3/FLAG365dad431 [2021-10-16 02:25:16,622 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:25:16,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-16 02:25:16,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/98aff0437/e54cd98809e54f6394e7b422a10240b3/FLAG365dad431 [2021-10-16 02:25:17,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/98aff0437/e54cd98809e54f6394e7b422a10240b3 [2021-10-16 02:25:17,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:25:17,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:25:17,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:25:17,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:25:17,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:25:17,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d641c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17, skipping insertion in model container [2021-10-16 02:25:17,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:25:17,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:25:17,244 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-16 02:25:17,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:25:17,267 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:25:17,292 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-16 02:25:17,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:25:17,307 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:25:17,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17 WrapperNode [2021-10-16 02:25:17,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:25:17,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:25:17,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:25:17,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:25:17,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:25:17,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:25:17,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:25:17,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:25:17,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:25:17,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:25:17,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:25:17,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:25:17,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (1/1) ... [2021-10-16 02:25:17,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:25:17,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:17,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:25:17,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:25:17,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:25:17,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:25:17,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:25:17,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:25:17,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:25:17,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:25:17,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:25:18,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:25:18,060 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 02:25:18,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:25:18 BoogieIcfgContainer [2021-10-16 02:25:18,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:25:18,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:25:18,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:25:18,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:25:18,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:25:17" (1/3) ... [2021-10-16 02:25:18,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1060cc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:25:18, skipping insertion in model container [2021-10-16 02:25:18,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:17" (2/3) ... [2021-10-16 02:25:18,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1060cc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:25:18, skipping insertion in model container [2021-10-16 02:25:18,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:25:18" (3/3) ... [2021-10-16 02:25:18,080 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-10-16 02:25:18,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:25:18,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:25:18,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:25:18,134 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 02:25:18,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:25:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:25:18,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:18,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:18,155 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:18,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1624531970, now seen corresponding path program 1 times [2021-10-16 02:25:18,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:25:18,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066312656] [2021-10-16 02:25:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:18,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:25:18,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:25:18,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848841042] [2021-10-16 02:25:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:18,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:18,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:18,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:25:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:18,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:18,435 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 02:25:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:18,466 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 02:25:18,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:25:18,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066312656] [2021-10-16 02:25:18,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:25:18,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848841042] [2021-10-16 02:25:18,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848841042] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:18,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:25:18,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:25:18,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236556280] [2021-10-16 02:25:18,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:25:18,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:25:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:25:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:18,490 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:18,514 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2021-10-16 02:25:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:25:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:25:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:18,535 INFO L225 Difference]: With dead ends: 22 [2021-10-16 02:25:18,535 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:25:18,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:25:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:25:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-16 02:25:18,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-10-16 02:25:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:18,575 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-16 02:25:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-16 02:25:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:25:18,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:18,579 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:18,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:18,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 02:25:18,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -132988094, now seen corresponding path program 1 times [2021-10-16 02:25:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:25:18,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081957894] [2021-10-16 02:25:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:18,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:25:18,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:25:18,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134702298] [2021-10-16 02:25:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:18,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:18,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:25:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:18,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:25:18,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:25:19,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:25:19,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081957894] [2021-10-16 02:25:19,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:25:19,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134702298] [2021-10-16 02:25:19,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134702298] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:19,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:25:19,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:25:19,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931887923] [2021-10-16 02:25:19,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:25:19,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:25:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:25:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:19,076 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:19,133 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-10-16 02:25:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:25:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:25:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:19,135 INFO L225 Difference]: With dead ends: 23 [2021-10-16 02:25:19,135 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:25:19,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 02:25:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:25:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-16 02:25:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-16 02:25:19,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-10-16 02:25:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:19,141 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-16 02:25:19,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-16 02:25:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:25:19,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:19,142 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:19,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:19,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:19,354 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1151414046, now seen corresponding path program 1 times [2021-10-16 02:25:19,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:25:19,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586951804] [2021-10-16 02:25:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:19,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:25:19,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:25:19,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509280525] [2021-10-16 02:25:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:19,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:19,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:19,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:19,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:25:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:25:19,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:25:19,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:25:19,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586951804] [2021-10-16 02:25:19,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:25:19,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509280525] [2021-10-16 02:25:19,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509280525] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:19,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:25:19,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:25:19,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433741017] [2021-10-16 02:25:19,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:25:19,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:25:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:25:19,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:19,596 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:19,623 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-16 02:25:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:25:19,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:25:19,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:19,624 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:25:19,625 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 02:25:19,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 02:25:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-16 02:25:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-16 02:25:19,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2021-10-16 02:25:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:19,661 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-16 02:25:19,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-16 02:25:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:25:19,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:19,662 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:19,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:19,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:19,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2095232066, now seen corresponding path program 1 times [2021-10-16 02:25:19,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:25:19,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809014581] [2021-10-16 02:25:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:19,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:25:19,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:25:19,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055500528] [2021-10-16 02:25:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:19,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:19,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:19,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:25:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:20,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:20,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:25:20,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-16 02:25:20,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:25:20,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809014581] [2021-10-16 02:25:20,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:25:20,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055500528] [2021-10-16 02:25:20,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055500528] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:20,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281011115] [2021-10-16 02:25:20,252 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 02:25:20,253 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:25:20,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:25:20,270 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:25:20,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:25:20,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,315 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:25:20,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:25:20,318 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:25:20,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:25:20,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-16 02:25:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:25:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:25:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:25:20,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:25:20,370 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:25:20,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:25:20,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:25:20,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:25:20,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:25:20,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-16 02:25:20,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:25:20,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:131, output treesize:134 [2021-10-16 02:25:20,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:20,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:20,623 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_23| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:25:20,628 INFO L168 Benchmark]: Toolchain (without parser) took 3604.74 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 61.6 MB in the beginning and 67.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:20,628 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 98.6 MB. Free memory is still 78.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:25:20,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.98 ms. Allocated memory is still 98.6 MB. Free memory was 61.5 MB in the beginning and 75.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:20,630 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.30 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 73.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:20,630 INFO L168 Benchmark]: Boogie Preprocessor took 57.87 ms. Allocated memory is still 98.6 MB. Free memory was 73.2 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:20,631 INFO L168 Benchmark]: RCFGBuilder took 617.04 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 50.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:20,632 INFO L168 Benchmark]: TraceAbstraction took 2561.96 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 50.1 MB in the beginning and 67.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:20,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 98.6 MB. Free memory is still 78.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.98 ms. Allocated memory is still 98.6 MB. Free memory was 61.5 MB in the beginning and 75.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.30 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 73.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.87 ms. Allocated memory is still 98.6 MB. Free memory was 73.2 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 617.04 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 50.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2561.96 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 50.1 MB in the beginning and 67.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_23| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_23|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:25:20,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/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 02:25:23,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:25:23,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:25:23,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:25:23,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:25:23,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:25:23,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:25:23,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:25:23,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:25:23,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:25:23,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:25:23,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:25:23,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:25:23,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:25:23,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:25:23,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:25:23,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:25:23,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:25:23,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:25:23,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:25:23,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:25:23,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:25:23,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:25:23,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:25:23,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:25:23,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:25:23,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:25:23,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:25:23,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:25:23,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:25:23,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:25:23,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:25:23,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:25:23,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:25:23,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:25:23,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:25:23,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:25:23,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:25:23,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:25:23,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:25:23,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:25:23,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:25:23,267 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:25:23,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:25:23,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:25:23,270 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:25:23,270 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:25:23,270 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:25:23,270 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:25:23,271 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:25:23,271 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:25:23,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:25:23,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:25:23,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:25:23,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:25:23,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:25:23,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:25:23,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:25:23,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:25:23,275 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:25:23,275 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:25:23,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:25:23,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:25:23,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:25:23,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:25:23,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:25:23,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:25:23,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:25:23,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:25:23,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:25:23,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:25:23,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:25:23,279 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:25:23,279 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:23,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:25:23,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:25:23,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:25:23,280 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2021-10-16 02:25:23,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:25:23,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:25:23,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:25:23,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:25:23,697 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:25:23,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-16 02:25:23,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/b1e84c13d/e5278961ed49426ab6e1fc97d7c7a6c9/FLAGe7b92628e [2021-10-16 02:25:24,240 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:25:24,241 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-10-16 02:25:24,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/b1e84c13d/e5278961ed49426ab6e1fc97d7c7a6c9/FLAGe7b92628e [2021-10-16 02:25:24,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/data/b1e84c13d/e5278961ed49426ab6e1fc97d7c7a6c9 [2021-10-16 02:25:24,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:25:24,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:25:24,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:25:24,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:25:24,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:25:24,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa1e85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24, skipping insertion in model container [2021-10-16 02:25:24,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:25:24,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:25:24,814 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-16 02:25:24,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:25:24,867 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:25:24,894 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_02f37b76-0061-4641-b431-5d9e9f1d9e34/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-10-16 02:25:24,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:25:24,910 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:25:24,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24 WrapperNode [2021-10-16 02:25:24,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:25:24,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:25:24,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:25:24,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:25:24,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:25:24,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:25:24,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:25:24,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:25:24,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:25:24,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:25:24,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:25:24,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:25:24,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (1/1) ... [2021-10-16 02:25:24,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:25:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:25,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:25:25,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:25:25,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:25:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:25:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:25:25,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:25:25,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:25:25,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:25:25,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:25:26,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:25:26,212 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 02:25:26,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:25:26 BoogieIcfgContainer [2021-10-16 02:25:26,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:25:26,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:25:26,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:25:26,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:25:26,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:25:24" (1/3) ... [2021-10-16 02:25:26,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cfa0a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:25:26, skipping insertion in model container [2021-10-16 02:25:26,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:25:24" (2/3) ... [2021-10-16 02:25:26,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13cfa0a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:25:26, skipping insertion in model container [2021-10-16 02:25:26,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:25:26" (3/3) ... [2021-10-16 02:25:26,230 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-10-16 02:25:26,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:25:26,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:25:26,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:25:26,316 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 02:25:26,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:25:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:25:26,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:26,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:26,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-16 02:25:26,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:26,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711385648] [2021-10-16 02:25:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:26,374 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:26,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:26,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:25:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:25:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:26,900 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 02:25:26,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:27,001 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 02:25:27,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:27,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711385648] [2021-10-16 02:25:27,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711385648] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:27,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:25:27,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:25:27,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362056362] [2021-10-16 02:25:27,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:25:27,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:25:27,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:25:27,038 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:27,062 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-10-16 02:25:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:25:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:25:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:27,073 INFO L225 Difference]: With dead ends: 56 [2021-10-16 02:25:27,073 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:25:27,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:25:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:25:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 02:25:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-10-16 02:25:27,123 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-10-16 02:25:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:27,123 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-10-16 02:25:27,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-16 02:25:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:25:27,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:27,125 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:27,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:27,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:27,346 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:27,347 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-10-16 02:25:27,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:27,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786959048] [2021-10-16 02:25:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:27,348 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:27,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:27,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:27,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:25:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:27,795 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 02:25:27,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:27,899 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 02:25:27,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:27,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786959048] [2021-10-16 02:25:27,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786959048] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:27,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:25:27,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:25:27,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160768946] [2021-10-16 02:25:27,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:25:27,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:27,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:25:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:27,904 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:27,947 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-10-16 02:25:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:25:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:25:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:27,949 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:25:27,949 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 02:25:27,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:25:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 02:25:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-16 02:25:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-16 02:25:27,964 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2021-10-16 02:25:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:27,964 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-16 02:25:27,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-16 02:25:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:25:27,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:27,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:28,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 02:25:28,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:28,203 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -790773651, now seen corresponding path program 1 times [2021-10-16 02:25:28,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:28,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225107478] [2021-10-16 02:25:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:28,206 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:28,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:28,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:25:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:28,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:28,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:28,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225107478] [2021-10-16 02:25:28,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225107478] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:28,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1087060587] [2021-10-16 02:25:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:28,814 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:28,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:28,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:25:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:25:29,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:25:29,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1087060587] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:29,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:25:29,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-10-16 02:25:29,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476714527] [2021-10-16 02:25:29,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:25:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:25:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:25:29,118 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:29,501 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-10-16 02:25:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:25:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:25:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:29,505 INFO L225 Difference]: With dead ends: 67 [2021-10-16 02:25:29,505 INFO L226 Difference]: Without dead ends: 50 [2021-10-16 02:25:29,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:25:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-16 02:25:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-16 02:25:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-16 02:25:29,513 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 21 [2021-10-16 02:25:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:29,514 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-16 02:25:29,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-10-16 02:25:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:25:29,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:29,515 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:29,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:29,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:29,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:29,916 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -532548631, now seen corresponding path program 1 times [2021-10-16 02:25:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:29,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836463272] [2021-10-16 02:25:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:29,918 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:29,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:29,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:25:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:30,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:30,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836463272] [2021-10-16 02:25:30,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836463272] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:30,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569887401] [2021-10-16 02:25:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:30,294 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:30,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:30,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:30,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:25:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:30,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:30,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:30,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [569887401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:30,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904235130] [2021-10-16 02:25:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:30,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:30,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:30,671 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:30,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:25:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:25:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:25:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:25:31,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904235130] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:31,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:25:31,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 16 [2021-10-16 02:25:31,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987087624] [2021-10-16 02:25:31,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:25:31,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:25:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:25:31,437 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:32,225 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-16 02:25:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:25:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:25:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:32,229 INFO L225 Difference]: With dead ends: 98 [2021-10-16 02:25:32,229 INFO L226 Difference]: Without dead ends: 93 [2021-10-16 02:25:32,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:25:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-16 02:25:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-10-16 02:25:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2021-10-16 02:25:32,242 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 21 [2021-10-16 02:25:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:32,243 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2021-10-16 02:25:32,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2021-10-16 02:25:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:25:32,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:32,245 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:32,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:32,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:32,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:32,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:32,851 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash -781348630, now seen corresponding path program 1 times [2021-10-16 02:25:32,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:32,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468752665] [2021-10-16 02:25:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:32,853 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:32,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:32,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:32,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:25:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:33,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:33,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:33,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468752665] [2021-10-16 02:25:33,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468752665] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:33,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1216440720] [2021-10-16 02:25:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:33,329 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:33,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:33,343 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:33,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:25:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:33,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:25:34,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1216440720] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:34,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011661902] [2021-10-16 02:25:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:34,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:34,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:34,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:25:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:25:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:25:34,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011661902] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:34,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:25:34,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-10-16 02:25:34,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673595052] [2021-10-16 02:25:34,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:25:34,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:25:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:25:34,631 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:34,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:34,770 INFO L93 Difference]: Finished difference Result 131 states and 191 transitions. [2021-10-16 02:25:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:25:34,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 02:25:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:34,773 INFO L225 Difference]: With dead ends: 131 [2021-10-16 02:25:34,773 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 02:25:34,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:25:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 02:25:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-16 02:25:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-10-16 02:25:34,785 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 24 [2021-10-16 02:25:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:34,786 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-10-16 02:25:34,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-10-16 02:25:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 02:25:34,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:34,788 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:34,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:35,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:35,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:35,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:35,399 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:35,400 INFO L82 PathProgramCache]: Analyzing trace with hash -358269621, now seen corresponding path program 1 times [2021-10-16 02:25:35,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:35,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048853632] [2021-10-16 02:25:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:35,401 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:35,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:35,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:25:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:25:35,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:25:36,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:36,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048853632] [2021-10-16 02:25:36,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048853632] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:36,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1943169023] [2021-10-16 02:25:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:36,105 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:36,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:36,106 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:36,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:25:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:25:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:25:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:25:36,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1943169023] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:36,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517626366] [2021-10-16 02:25:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:36,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:36,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:36,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:36,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:25:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:25:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:25:37,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:25:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517626366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:37,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:25:37,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-10-16 02:25:37,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250111896] [2021-10-16 02:25:37,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:25:37,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:25:37,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:25:37,573 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:39,011 INFO L93 Difference]: Finished difference Result 245 states and 340 transitions. [2021-10-16 02:25:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:25:39,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-16 02:25:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:39,013 INFO L225 Difference]: With dead ends: 245 [2021-10-16 02:25:39,013 INFO L226 Difference]: Without dead ends: 173 [2021-10-16 02:25:39,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:25:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-16 02:25:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2021-10-16 02:25:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.403225806451613) internal successors, (174), 124 states have internal predecessors, (174), 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 02:25:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2021-10-16 02:25:39,031 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 39 [2021-10-16 02:25:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:39,032 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2021-10-16 02:25:39,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2021-10-16 02:25:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-16 02:25:39,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:39,035 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:39,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-16 02:25:39,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:39,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:39,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:39,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1109413569, now seen corresponding path program 1 times [2021-10-16 02:25:39,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:39,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317205424] [2021-10-16 02:25:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:39,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:39,640 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:39,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:25:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:25:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:25:40,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:25:40,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:40,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317205424] [2021-10-16 02:25:40,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317205424] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:40,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933987464] [2021-10-16 02:25:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:40,849 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:40,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:40,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:40,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:25:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:25:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:25:42,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:25:42,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933987464] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:42,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681578171] [2021-10-16 02:25:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:42,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:42,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:42,803 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:42,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:25:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:25:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-16 02:25:43,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-16 02:25:44,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681578171] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:25:44,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:25:44,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9, 9, 9] total 18 [2021-10-16 02:25:44,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617603973] [2021-10-16 02:25:44,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:25:44,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:25:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:25:44,184 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:44,224 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2021-10-16 02:25:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:25:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-16 02:25:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:44,227 INFO L225 Difference]: With dead ends: 167 [2021-10-16 02:25:44,227 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 02:25:44,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:25:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 02:25:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-10-16 02:25:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3846153846153846) internal successors, (180), 130 states have internal predecessors, (180), 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 02:25:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2021-10-16 02:25:44,243 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 47 [2021-10-16 02:25:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:44,243 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2021-10-16 02:25:44,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2021-10-16 02:25:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-16 02:25:44,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:44,247 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:44,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:44,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-16 02:25:44,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:44,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:44,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1522869053, now seen corresponding path program 1 times [2021-10-16 02:25:44,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:44,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976027328] [2021-10-16 02:25:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:44,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:44,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:44,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:25:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:25:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-16 02:25:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-16 02:25:46,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:46,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976027328] [2021-10-16 02:25:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976027328] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:46,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1253319533] [2021-10-16 02:25:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:46,249 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:46,250 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:46,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:25:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:25:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-16 02:25:48,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-16 02:25:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1253319533] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:48,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083870395] [2021-10-16 02:25:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:48,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:48,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:48,271 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:48,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:25:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-16 02:25:49,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-16 02:25:49,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083870395] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:49,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:25:49,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 4, 5] total 21 [2021-10-16 02:25:49,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642943987] [2021-10-16 02:25:49,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-16 02:25:49,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-16 02:25:49,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:25:49,969 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 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 02:25:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:51,034 INFO L93 Difference]: Finished difference Result 309 states and 433 transitions. [2021-10-16 02:25:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 02:25:51,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 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 51 [2021-10-16 02:25:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:51,037 INFO L225 Difference]: With dead ends: 309 [2021-10-16 02:25:51,037 INFO L226 Difference]: Without dead ends: 193 [2021-10-16 02:25:51,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-10-16 02:25:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-16 02:25:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-10-16 02:25:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.2857142857142858) internal successors, (225), 175 states have internal predecessors, (225), 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 02:25:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-10-16 02:25:51,055 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 51 [2021-10-16 02:25:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:51,056 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-10-16 02:25:51,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 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 02:25:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-10-16 02:25:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-16 02:25:51,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:51,060 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:51,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:51,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:51,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:51,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:51,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:51,672 INFO L82 PathProgramCache]: Analyzing trace with hash -598864586, now seen corresponding path program 1 times [2021-10-16 02:25:51,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:51,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171840251] [2021-10-16 02:25:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:51,672 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:51,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:51,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:25:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:52,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:25:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-16 02:25:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-16 02:25:52,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:52,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171840251] [2021-10-16 02:25:52,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171840251] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:52,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1909564606] [2021-10-16 02:25:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:52,835 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:52,836 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:52,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-16 02:25:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:25:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-16 02:25:54,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-10-16 02:25:54,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1909564606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:54,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259744732] [2021-10-16 02:25:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:54,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:54,294 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:54,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-16 02:25:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:25:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-10-16 02:25:55,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-10-16 02:25:55,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259744732] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:55,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:25:55,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 18 [2021-10-16 02:25:55,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95959835] [2021-10-16 02:25:55,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:25:55,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:25:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:25:55,719 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 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 02:25:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:57,290 INFO L93 Difference]: Finished difference Result 481 states and 685 transitions. [2021-10-16 02:25:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-16 02:25:57,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 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 80 [2021-10-16 02:25:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:57,294 INFO L225 Difference]: With dead ends: 481 [2021-10-16 02:25:57,294 INFO L226 Difference]: Without dead ends: 343 [2021-10-16 02:25:57,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:25:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-10-16 02:25:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 220. [2021-10-16 02:25:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.1461187214611872) internal successors, (251), 219 states have internal predecessors, (251), 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 02:25:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 251 transitions. [2021-10-16 02:25:57,314 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 251 transitions. Word has length 80 [2021-10-16 02:25:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:57,314 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 251 transitions. [2021-10-16 02:25:57,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 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 02:25:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 251 transitions. [2021-10-16 02:25:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-16 02:25:57,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:57,321 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:57,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:57,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:57,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:57,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:57,936 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1411129585, now seen corresponding path program 1 times [2021-10-16 02:25:57,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:57,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200225415] [2021-10-16 02:25:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:57,937 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:57,938 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:57,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 02:25:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:25:58,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:25:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-16 02:25:59,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-16 02:25:59,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200225415] [2021-10-16 02:25:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200225415] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871525656] [2021-10-16 02:25:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:25:59,744 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:59,750 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-16 02:26:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:26:00,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-16 02:26:00,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-16 02:26:01,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871525656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:01,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585434022] [2021-10-16 02:26:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:26:01,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:01,342 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:01,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-16 02:26:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:26:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:26:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-16 02:26:02,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-16 02:26:03,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585434022] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:03,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:03,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-16 02:26:03,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883408221] [2021-10-16 02:26:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:26:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:26:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:26:03,345 INFO L87 Difference]: Start difference. First operand 220 states and 251 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:26:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:05,584 INFO L93 Difference]: Finished difference Result 1070 states and 1343 transitions. [2021-10-16 02:26:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:26:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-10-16 02:26:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:05,598 INFO L225 Difference]: With dead ends: 1070 [2021-10-16 02:26:05,598 INFO L226 Difference]: Without dead ends: 939 [2021-10-16 02:26:05,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:26:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-10-16 02:26:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 558. [2021-10-16 02:26:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.272890484739677) internal successors, (709), 557 states have internal predecessors, (709), 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 02:26:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 709 transitions. [2021-10-16 02:26:05,650 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 709 transitions. Word has length 139 [2021-10-16 02:26:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:05,651 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 709 transitions. [2021-10-16 02:26:05,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:26:05,651 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 709 transitions. [2021-10-16 02:26:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-10-16 02:26:05,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:05,654 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:05,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-16 02:26:05,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:06,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:06,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:06,272 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash -855251601, now seen corresponding path program 2 times [2021-10-16 02:26:06,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:06,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919030710] [2021-10-16 02:26:06,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:06,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:06,290 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:06,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 02:26:07,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:07,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:07,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:26:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-16 02:26:08,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-16 02:26:08,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:26:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919030710] [2021-10-16 02:26:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919030710] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1585625381] [2021-10-16 02:26:08,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:08,897 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:26:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:26:08,903 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:26:08,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-16 02:26:12,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:12,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:26:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-16 02:26:12,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-16 02:26:12,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1585625381] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:12,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285184391] [2021-10-16 02:26:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:26:12,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:26:12,914 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:26:12,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-16 02:26:17,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:26:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:26:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:26:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:26:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-16 02:26:17,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:26:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-10-16 02:26:17,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285184391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:26:17,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:26:17,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-16 02:26:17,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039031603] [2021-10-16 02:26:17,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-16 02:26:17,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:26:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-16 02:26:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:26:17,971 INFO L87 Difference]: Start difference. First operand 558 states and 709 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:26:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:26:18,312 INFO L93 Difference]: Finished difference Result 724 states and 921 transitions. [2021-10-16 02:26:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:26:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-10-16 02:26:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:26:18,318 INFO L225 Difference]: With dead ends: 724 [2021-10-16 02:26:18,318 INFO L226 Difference]: Without dead ends: 570 [2021-10-16 02:26:18,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:26:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-10-16 02:26:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-10-16 02:26:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.2671353251318103) internal successors, (721), 569 states have internal predecessors, (721), 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 02:26:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 721 transitions. [2021-10-16 02:26:18,368 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 721 transitions. Word has length 139 [2021-10-16 02:26:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:26:18,370 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 721 transitions. [2021-10-16 02:26:18,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:26:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 721 transitions. [2021-10-16 02:26:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-16 02:26:18,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:26:18,373 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:26:18,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:18,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-10-16 02:26:18,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:18,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:26:18,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:26:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:26:18,989 INFO L82 PathProgramCache]: Analyzing trace with hash 532363753, now seen corresponding path program 3 times [2021-10-16 02:26:18,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:26:18,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560974539] [2021-10-16 02:26:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:26:18,990 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:26:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:26:18,991 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:26:18,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 02:26:24,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 02:26:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:26:24,141 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:26:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:26:26,027 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:26:26,027 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:26:26,028 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:26:26,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:26:26,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:26:26,241 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:26:26,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:26:26 BoogieIcfgContainer [2021-10-16 02:26:26,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:26:26,383 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:26:26,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:26:26,384 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:26:26,384 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:25:26" (3/4) ... [2021-10-16 02:26:26,386 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:26:26,550 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:26:26,550 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:26:26,552 INFO L168 Benchmark]: Toolchain (without parser) took 61937.81 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.0 MB in the beginning and 18.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:26,553 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 58.7 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:26:26,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.84 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 41.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:26,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.83 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:26,554 INFO L168 Benchmark]: Boogie Preprocessor took 33.89 ms. Allocated memory is still 58.7 MB. Free memory was 39.3 MB in the beginning and 37.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:26:26,555 INFO L168 Benchmark]: RCFGBuilder took 1225.38 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.7 MB in the beginning and 54.9 MB in the end (delta: -17.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:26,555 INFO L168 Benchmark]: TraceAbstraction took 60163.43 ms. Allocated memory is still 73.4 MB. Free memory was 54.4 MB in the beginning and 26.0 MB in the end (delta: 28.4 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:26,556 INFO L168 Benchmark]: Witness Printer took 166.91 ms. Allocated memory is still 73.4 MB. Free memory was 25.9 MB in the beginning and 18.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:26:26,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 58.7 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.84 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 41.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.83 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.89 ms. Allocated memory is still 58.7 MB. Free memory was 39.3 MB in the beginning and 37.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1225.38 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.7 MB in the beginning and 54.9 MB in the end (delta: -17.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 60163.43 ms. Allocated memory is still 73.4 MB. Free memory was 54.4 MB in the beginning and 26.0 MB in the end (delta: 28.4 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. * Witness Printer took 166.91 ms. Allocated memory is still 73.4 MB. Free memory was 25.9 MB in the beginning and 18.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.1 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 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[10]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 10) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<10 -1) [L57] x[10 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 59936.0ms, OverallIterations: 12, TraceHistogramMax: 10, EmptinessCheckTime: 46.9ms, AutomataDifference: 8176.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 400 SDtfs, 1084 SDslu, 1643 SDs, 0 SdLazy, 1479 SolverSat, 438 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5672.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3366 GetRequests, 3230 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3432.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=570occurred in iteration=11, InterpolantAutomatonStates: 95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 241.2ms AutomataMinimizationTime, 11 MinimizatonAttempts, 612 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 484.8ms SsaConstructionTime, 19180.5ms SatisfiabilityAnalysisTime, 15131.0ms InterpolantComputationTime, 1841 NumberOfCodeBlocks, 1841 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 3336 ConstructedInterpolants, 0 QuantifiedInterpolants, 5149 SizeOfPredicates, 25 NumberOfNonLiveVariables, 3586 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 56 InterpolantComputations, 12 PerfectInterpolantSequences, 7578/8770 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 02:26:26,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02f37b76-0061-4641-b431-5d9e9f1d9e34/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...