./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn2f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:45:23,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:45:23,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:45:23,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:45:23,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:45:23,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:45:23,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:45:23,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:45:23,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:45:23,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:45:23,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:45:23,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:45:23,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:45:23,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:45:23,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:45:23,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:45:23,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:45:23,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:45:23,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:45:23,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:45:23,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:45:23,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:45:23,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:45:23,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:45:23,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:45:23,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:45:23,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:45:23,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:45:23,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:45:23,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:45:23,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:45:23,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:45:23,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:45:23,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:45:23,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:45:23,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:45:23,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:45:23,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:45:23,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:45:23,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:45:23,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:45:23,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:45:23,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:45:23,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:45:23,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:45:23,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:45:23,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:45:23,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:45:23,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:45:23,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:45:23,833 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:45:23,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:45:23,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:45:23,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:45:23,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:45:23,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:45:23,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:45:23,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:45:23,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:45:23,836 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:45:23,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:45:23,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:45:23,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:45:23,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:45:23,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:45:23,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:45:23,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:45:23,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:45:23,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:45:23,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:45:23,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:45:23,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:45:23,840 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:45:23,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:45:23,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:45:23,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:45:23,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 [2021-11-13 17:45:24,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:45:24,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:45:24,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:45:24,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:45:24,192 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:45:24,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/eqn2f.c [2021-11-13 17:45:24,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/535a810d7/18c82e29cd0f43708295680183e88587/FLAG168a07972 [2021-11-13 17:45:24,985 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:45:24,986 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/sv-benchmarks/c/array-fpi/eqn2f.c [2021-11-13 17:45:25,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/535a810d7/18c82e29cd0f43708295680183e88587/FLAG168a07972 [2021-11-13 17:45:25,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/535a810d7/18c82e29cd0f43708295680183e88587 [2021-11-13 17:45:25,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:45:25,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:45:25,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:45:25,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:45:25,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:45:25,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0cf355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25, skipping insertion in model container [2021-11-13 17:45:25,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:45:25,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:45:25,605 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_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-11-13 17:45:25,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:45:25,654 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:45:25,670 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_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-11-13 17:45:25,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:45:25,706 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:45:25,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25 WrapperNode [2021-11-13 17:45:25,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:45:25,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:45:25,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:45:25,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:45:25,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:45:25,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:45:25,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:45:25,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:45:25,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:45:25,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:45:25,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:45:25,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:45:25,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (1/1) ... [2021-11-13 17:45:25,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:45:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:25,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:45:25,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:45:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:45:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:45:25,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:45:25,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:45:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:45:25,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:45:25,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:45:26,194 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:45:26,195 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:45:26,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:45:26 BoogieIcfgContainer [2021-11-13 17:45:26,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:45:26,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:45:26,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:45:26,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:45:26,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:45:25" (1/3) ... [2021-11-13 17:45:26,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeddbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:45:26, skipping insertion in model container [2021-11-13 17:45:26,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:25" (2/3) ... [2021-11-13 17:45:26,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeddbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:45:26, skipping insertion in model container [2021-11-13 17:45:26,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:45:26" (3/3) ... [2021-11-13 17:45:26,228 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2021-11-13 17:45:26,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:45:26,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:45:26,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:45:26,358 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:45:26,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:45:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:45:26,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:26,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:26,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-13 17:45:26,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:26,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665772513] [2021-11-13 17:45:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:26,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:26,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:26,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665772513] [2021-11-13 17:45:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665772513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:26,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:26,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:45:26,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269107919] [2021-11-13 17:45:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:26,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:45:26,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:45:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:45:26,770 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:26,791 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-13 17:45:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:45:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 17:45:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:26,804 INFO L225 Difference]: With dead ends: 38 [2021-11-13 17:45:26,805 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 17:45:26,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:45:26,814 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:26,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:45:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 17:45:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-13 17:45:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-11-13 17:45:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-13 17:45:26,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-13 17:45:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:26,860 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-13 17:45:26,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-13 17:45:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:45:26,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:26,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:26,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:45:26,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-13 17:45:26,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:26,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704248430] [2021-11-13 17:45:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:26,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:26,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:45:26,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253019510] [2021-11-13 17:45:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:26,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:26,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:45:26,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:45:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 17:45:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:27,236 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-13 17:45:27,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-13 17:45:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:27,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:45:27,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:27,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704248430] [2021-11-13 17:45:27,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:45:27,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253019510] [2021-11-13 17:45:27,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253019510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:27,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:27,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:45:27,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203265272] [2021-11-13 17:45:27,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:27,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:45:27,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:45:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:45:27,512 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:27,673 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-13 17:45:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:45:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 17:45:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:27,680 INFO L225 Difference]: With dead ends: 34 [2021-11-13 17:45:27,680 INFO L226 Difference]: Without dead ends: 32 [2021-11-13 17:45:27,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:45:27,683 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.03ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:27,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 104.03ms Time] [2021-11-13 17:45:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-13 17:45:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-13 17:45:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-13 17:45:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 17:45:27,699 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-13 17:45:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:27,700 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 17:45:27,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 17:45:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:45:27,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:27,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:27,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:27,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:27,940 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-13 17:45:27,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:27,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972290912] [2021-11-13 17:45:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:27,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:27,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:45:27,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677841804] [2021-11-13 17:45:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:27,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:28,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:45:28,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:45:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:45:28,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:28,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:45:28,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:28,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972290912] [2021-11-13 17:45:28,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:45:28,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677841804] [2021-11-13 17:45:28,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677841804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:28,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:28,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:45:28,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274074438] [2021-11-13 17:45:28,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:28,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:45:28,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:45:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:45:28,202 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-11-13 17:45:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:28,329 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-13 17:45:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:45:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 14 [2021-11-13 17:45:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:28,335 INFO L225 Difference]: With dead ends: 49 [2021-11-13 17:45:28,335 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 17:45:28,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:45:28,341 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.32ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:28,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 75.32ms Time] [2021-11-13 17:45:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 17:45:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-13 17:45:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-11-13 17:45:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-13 17:45:28,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-13 17:45:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:28,363 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-13 17:45:28,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-11-13 17:45:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-13 17:45:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:45:28,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:28,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:28,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:28,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:28,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-13 17:45:28,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:28,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260810519] [2021-11-13 17:45:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:28,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:28,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:45:28,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811608847] [2021-11-13 17:45:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:28,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:28,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:28,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:45:28,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:45:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:45:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:28,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:28,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260810519] [2021-11-13 17:45:28,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:45:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811608847] [2021-11-13 17:45:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811608847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:45:28,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:45:28,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-13 17:45:28,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447821969] [2021-11-13 17:45:28,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:45:28,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:45:28,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:45:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:45:28,888 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-13 17:45:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:29,062 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-13 17:45:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:45:29,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-13 17:45:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:29,065 INFO L225 Difference]: With dead ends: 44 [2021-11-13 17:45:29,066 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 17:45:29,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:45:29,075 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:29,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 78.21ms Time] [2021-11-13 17:45:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 17:45:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-11-13 17:45:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2021-11-13 17:45:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-13 17:45:29,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-13 17:45:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:29,097 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-13 17:45:29,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-13 17:45:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-13 17:45:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:45:29,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:29,100 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:29,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:29,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:29,316 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-13 17:45:29,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:29,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360104155] [2021-11-13 17:45:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:29,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:29,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:45:29,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31805504] [2021-11-13 17:45:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:29,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:29,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:45:29,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:45:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 17:45:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:29,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:45:29,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:29,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360104155] [2021-11-13 17:45:29,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:45:29,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31805504] [2021-11-13 17:45:29,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31805504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:29,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:29,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:45:29,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110256794] [2021-11-13 17:45:29,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:29,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:45:29,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:45:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:45:29,564 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-13 17:45:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:29,669 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-13 17:45:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:45:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-13 17:45:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:29,670 INFO L225 Difference]: With dead ends: 41 [2021-11-13 17:45:29,671 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 17:45:29,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:45:29,672 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:29,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 69.64ms Time] [2021-11-13 17:45:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 17:45:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-13 17:45:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-11-13 17:45:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-13 17:45:29,678 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-13 17:45:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:29,679 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-13 17:45:29,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-13 17:45:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-13 17:45:29,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:45:29,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:29,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:29,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:29,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:29,904 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-13 17:45:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:29,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554381501] [2021-11-13 17:45:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:29,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:29,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:45:29,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933962983] [2021-11-13 17:45:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:29,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:29,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:45:29,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:45:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 17:45:30,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:30,103 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-13 17:45:30,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-13 17:45:30,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 17:45:30,237 INFO L354 Elim1Store]: treesize reduction 74, result has 26.0 percent of original size [2021-11-13 17:45:30,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-11-13 17:45:30,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:30,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554381501] [2021-11-13 17:45:30,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:45:30,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933962983] [2021-11-13 17:45:30,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 17:45:30,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:30,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-13 17:45:30,495 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-13 17:45:30,496 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-13 17:45:30,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 17:45:30,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 17:45:30,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:30,737 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-13 17:45:30,740 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 17:45:30,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 05:45:30 BoogieIcfgContainer [2021-11-13 17:45:30,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 17:45:30,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 17:45:30,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 17:45:30,760 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 17:45:30,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:45:26" (3/4) ... [2021-11-13 17:45:30,764 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 17:45:30,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 17:45:30,765 INFO L158 Benchmark]: Toolchain (without parser) took 5426.39ms. Allocated memory is still 127.9MB. Free memory was 98.0MB in the beginning and 59.0MB in the end (delta: 39.1MB). Peak memory consumption was 39.6MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,766 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 83.9MB. Free memory was 44.7MB in the beginning and 44.6MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:45:30,767 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.74ms. Allocated memory is still 127.9MB. Free memory was 98.0MB in the beginning and 104.8MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,767 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.50ms. Allocated memory is still 127.9MB. Free memory was 104.8MB in the beginning and 103.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,768 INFO L158 Benchmark]: Boogie Preprocessor took 34.90ms. Allocated memory is still 127.9MB. Free memory was 103.4MB in the beginning and 102.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,768 INFO L158 Benchmark]: RCFGBuilder took 407.44ms. Allocated memory is still 127.9MB. Free memory was 102.0MB in the beginning and 91.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,769 INFO L158 Benchmark]: TraceAbstraction took 4558.35ms. Allocated memory is still 127.9MB. Free memory was 90.8MB in the beginning and 59.9MB in the end (delta: 30.9MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,769 INFO L158 Benchmark]: Witness Printer took 5.67ms. Allocated memory is still 127.9MB. Free memory was 59.9MB in the beginning and 59.0MB in the end (delta: 940.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:45:30,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 83.9MB. Free memory was 44.7MB in the beginning and 44.6MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.74ms. Allocated memory is still 127.9MB. Free memory was 98.0MB in the beginning and 104.8MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.50ms. Allocated memory is still 127.9MB. Free memory was 104.8MB in the beginning and 103.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.90ms. Allocated memory is still 127.9MB. Free memory was 103.4MB in the beginning and 102.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 407.44ms. Allocated memory is still 127.9MB. Free memory was 102.0MB in the beginning and 91.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4558.35ms. Allocated memory is still 127.9MB. Free memory was 90.8MB in the beginning and 59.9MB in the end (delta: 30.9MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * Witness Printer took 5.67ms. Allocated memory is still 127.9MB. Free memory was 59.9MB in the beginning and 59.0MB in the end (delta: 940.5kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 [L34] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 [2021-11-13 17:45:35,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:45:35,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:45:35,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:45:35,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:45:35,322 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:45:35,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/eqn2f.c [2021-11-13 17:45:35,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/37d6dd63b/4ee2c8264ec64546b850206944f6f7cc/FLAGbf6594ff9 [2021-11-13 17:45:36,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:45:36,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/sv-benchmarks/c/array-fpi/eqn2f.c [2021-11-13 17:45:36,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/37d6dd63b/4ee2c8264ec64546b850206944f6f7cc/FLAGbf6594ff9 [2021-11-13 17:45:36,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/data/37d6dd63b/4ee2c8264ec64546b850206944f6f7cc [2021-11-13 17:45:36,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:45:36,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:45:36,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:45:36,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:45:36,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:45:36,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:36,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75bd0407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36, skipping insertion in model container [2021-11-13 17:45:36,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:36,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:45:36,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:45:36,844 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_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-11-13 17:45:36,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:45:36,911 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:45:36,931 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_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-11-13 17:45:36,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:45:36,990 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:45:36,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36 WrapperNode [2021-11-13 17:45:36,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:45:36,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:45:36,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:45:36,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:45:37,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:45:37,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:45:37,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:45:37,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:45:37,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:45:37,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:45:37,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:45:37,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:45:37,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (1/1) ... [2021-11-13 17:45:37,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:45:37,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:37,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:45:37,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:45:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 17:45:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:45:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 17:45:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:45:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:45:37,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:45:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 17:45:37,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:45:37,986 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:45:37,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:45:37 BoogieIcfgContainer [2021-11-13 17:45:37,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:45:37,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:45:38,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:45:38,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:45:38,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:45:36" (1/3) ... [2021-11-13 17:45:38,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8cb930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:45:38, skipping insertion in model container [2021-11-13 17:45:38,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:45:36" (2/3) ... [2021-11-13 17:45:38,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8cb930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:45:38, skipping insertion in model container [2021-11-13 17:45:38,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:45:37" (3/3) ... [2021-11-13 17:45:38,020 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2021-11-13 17:45:38,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:45:38,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:45:38,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:45:38,268 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:45:38,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:45:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:45:38,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:38,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:38,333 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-13 17:45:38,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:38,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966742069] [2021-11-13 17:45:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:38,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:38,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 17:45:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 17:45:38,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:38,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:38,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:45:38,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966742069] [2021-11-13 17:45:38,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966742069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:38,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:38,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 17:45:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585339894] [2021-11-13 17:45:38,858 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:38,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:45:38,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:45:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:45:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:45:38,924 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:38,954 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-13 17:45:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:45:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 17:45:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:38,974 INFO L225 Difference]: With dead ends: 38 [2021-11-13 17:45:38,975 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 17:45:38,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:45:38,988 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:38,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:45:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 17:45:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-13 17:45:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-11-13 17:45:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-13 17:45:39,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-13 17:45:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:39,046 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-13 17:45:39,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-13 17:45:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:45:39,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:39,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:39,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:39,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:45:39,263 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-13 17:45:39,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:39,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707280719] [2021-11-13 17:45:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:39,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:39,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:39,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:39,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 17:45:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:45:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:39,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:39,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:39,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:39,947 INFO L354 Elim1Store]: treesize reduction 149, result has 22.8 percent of original size [2021-11-13 17:45:39,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 62 [2021-11-13 17:45:40,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:45:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-13 17:45:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:40,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:40,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:45:40,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707280719] [2021-11-13 17:45:40,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707280719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:40,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:40,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 17:45:40,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912753] [2021-11-13 17:45:40,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:40,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:45:40,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:45:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:45:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:45:40,923 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-11-13 17:45:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:41,813 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-13 17:45:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:45:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 12 [2021-11-13 17:45:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:41,820 INFO L225 Difference]: With dead ends: 35 [2021-11-13 17:45:41,820 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 17:45:41,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:45:41,824 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 584.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.21ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 661.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:41,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 82 Invalid, 51 Unknown, 0 Unchecked, 4.21ms Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 661.77ms Time] [2021-11-13 17:45:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 17:45:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-11-13 17:45:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-13 17:45:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 17:45:41,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-13 17:45:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 17:45:41,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2021-11-13 17:45:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 17:45:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:45:41,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:41,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:41,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:42,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:45:42,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-13 17:45:42,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:42,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816509774] [2021-11-13 17:45:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:42,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:42,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 17:45:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:45:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:42,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:42,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:45:42,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816509774] [2021-11-13 17:45:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816509774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:45:42,665 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:45:42,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-13 17:45:42,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551662280] [2021-11-13 17:45:42,666 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:45:42,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:45:42,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:45:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:45:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:45:42,669 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2021-11-13 17:45:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:43,552 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-13 17:45:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:45:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 14 [2021-11-13 17:45:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:43,558 INFO L225 Difference]: With dead ends: 43 [2021-11-13 17:45:43,558 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 17:45:43,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:45:43,562 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 510.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:43,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 510.83ms Time] [2021-11-13 17:45:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 17:45:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-11-13 17:45:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-11-13 17:45:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-13 17:45:43,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-13 17:45:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:43,588 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-13 17:45:43,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2021-11-13 17:45:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-13 17:45:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-13 17:45:43,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:43,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:43,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:43,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:45:43,808 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-13 17:45:43,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:43,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731695431] [2021-11-13 17:45:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:43,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:43,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:43,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 17:45:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 17:45:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:44,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:44,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:45:44,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731695431] [2021-11-13 17:45:44,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731695431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:45:44,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:45:44,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-13 17:45:44,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390522182] [2021-11-13 17:45:44,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:45:44,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 17:45:44,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:45:44,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 17:45:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:45:44,636 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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) [2021-11-13 17:45:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:46,066 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-11-13 17:45:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 17:45:46,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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 14 [2021-11-13 17:45:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:46,069 INFO L225 Difference]: With dead ends: 58 [2021-11-13 17:45:46,070 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 17:45:46,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-11-13 17:45:46,073 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 587.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 671.81ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:46,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 41 Invalid, 155 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [51 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 671.81ms Time] [2021-11-13 17:45:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 17:45:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-11-13 17:45:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-13 17:45:46,094 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-11-13 17:45:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:46,095 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-13 17:45:46,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 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) [2021-11-13 17:45:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-13 17:45:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:45:46,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:46,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:46,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-13 17:45:46,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:45:46,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-13 17:45:46,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:46,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526948946] [2021-11-13 17:45:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:46,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:46,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:46,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:46,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 17:45:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 17:45:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:46,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:47,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:45:47,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526948946] [2021-11-13 17:45:47,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526948946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:45:47,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:45:47,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-13 17:45:47,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153769927] [2021-11-13 17:45:47,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:45:47,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:45:47,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:45:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:45:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:45:47,125 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:47,879 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-13 17:45:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:45:47,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-13 17:45:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:47,885 INFO L225 Difference]: With dead ends: 41 [2021-11-13 17:45:47,885 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 17:45:47,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:45:47,888 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 400.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:47,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 27 Invalid, 110 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [27 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 400.26ms Time] [2021-11-13 17:45:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 17:45:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-13 17:45:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-13 17:45:47,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-13 17:45:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:47,899 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-13 17:45:47,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-13 17:45:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:45:47,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:47,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:47,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:48,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:45:48,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-13 17:45:48,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:48,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555998792] [2021-11-13 17:45:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:48,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:48,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:48,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:48,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 17:45:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 17:45:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:48,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:48,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:48,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:48,421 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-13 17:45:48,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 39 [2021-11-13 17:45:48,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 17:45:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:48,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:49,116 INFO L354 Elim1Store]: treesize reduction 729, result has 10.9 percent of original size [2021-11-13 17:45:49,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 102 treesize of output 118 [2021-11-13 17:45:50,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:45:50,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555998792] [2021-11-13 17:45:50,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 17:45:50,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1932595833] [2021-11-13 17:45:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:50,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 17:45:50,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/cvc4 [2021-11-13 17:45:50,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 17:45:50,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 17:45:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 17:45:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:50,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-13 17:45:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:50,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2021-11-13 17:45:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:50,900 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 17:45:50,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 73 [2021-11-13 17:45:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:51,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:45:51,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:45:51,577 INFO L354 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2021-11-13 17:45:51,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 139 treesize of output 105 [2021-11-13 17:45:52,234 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-13 17:45:52,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 143 treesize of output 75 [2021-11-13 17:45:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:52,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:53,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1932595833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:45:53,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:45:53,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-13 17:45:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037554710] [2021-11-13 17:45:53,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:45:53,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:45:53,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:45:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:45:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:45:53,805 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2021-11-13 17:45:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:59,049 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-11-13 17:45:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 17:45:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 [2021-11-13 17:45:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:59,051 INFO L225 Difference]: With dead ends: 43 [2021-11-13 17:45:59,051 INFO L226 Difference]: Without dead ends: 41 [2021-11-13 17:45:59,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:45:59,054 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2706.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2804.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:59,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 92 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 16 Unchecked, 2804.73ms Time] [2021-11-13 17:45:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-13 17:45:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-11-13 17:45:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:45:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-13 17:45:59,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 16 [2021-11-13 17:45:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:59,070 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-13 17:45:59,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2021-11-13 17:45:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-13 17:45:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 17:45:59,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:59,073 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:45:59,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:59,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:59,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:45:59,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-11-13 17:45:59,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:45:59,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917004803] [2021-11-13 17:45:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:59,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:45:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:45:59,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:45:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 17:45:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 17:45:59,668 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 17:45:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 17:45:59,881 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 17:45:59,882 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 17:45:59,884 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 17:45:59,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:46:00,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:46:00,108 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:00,115 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 17:46:00,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 05:46:00 BoogieIcfgContainer [2021-11-13 17:46:00,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 17:46:00,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 17:46:00,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 17:46:00,201 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 17:46:00,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:45:37" (3/4) ... [2021-11-13 17:46:00,205 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-13 17:46:00,292 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1aa3c2a-1ccb-407a-9b51-8e0fc0c3edeb/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 17:46:00,292 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 17:46:00,293 INFO L158 Benchmark]: Toolchain (without parser) took 23742.72ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 40.1MB in the beginning and 25.3MB in the end (delta: 14.8MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2021-11-13 17:46:00,294 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 60.8MB. Free memory is still 40.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:46:00,294 INFO L158 Benchmark]: CACSL2BoogieTranslator took 439.20ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 43.9MB in the end (delta: -3.9MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-11-13 17:46:00,295 INFO L158 Benchmark]: Boogie Procedure Inliner took 100.29ms. Allocated memory is still 60.8MB. Free memory was 43.9MB in the beginning and 42.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:46:00,296 INFO L158 Benchmark]: Boogie Preprocessor took 48.10ms. Allocated memory is still 60.8MB. Free memory was 42.2MB in the beginning and 40.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:46:00,297 INFO L158 Benchmark]: RCFGBuilder took 846.53ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 29.1MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 17:46:00,297 INFO L158 Benchmark]: TraceAbstraction took 22205.81ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 28.7MB in the beginning and 28.2MB in the end (delta: 460.2kB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2021-11-13 17:46:00,298 INFO L158 Benchmark]: Witness Printer took 92.32ms. Allocated memory is still 81.8MB. Free memory was 28.2MB in the beginning and 25.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 17:46:00,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 60.8MB. Free memory is still 40.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 439.20ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 43.9MB in the end (delta: -3.9MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 100.29ms. Allocated memory is still 60.8MB. Free memory was 43.9MB in the beginning and 42.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.10ms. Allocated memory is still 60.8MB. Free memory was 42.2MB in the beginning and 40.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 846.53ms. Allocated memory is still 60.8MB. Free memory was 40.9MB in the beginning and 29.1MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 22205.81ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 28.7MB in the beginning and 28.2MB in the end (delta: 460.2kB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * Witness Printer took 92.32ms. Allocated memory is still 81.8MB. Free memory was 28.2MB in the beginning and 25.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [a={1:0}, b={3:0}, i=1, N=2] [L34] COND TRUE i