./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4.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_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/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_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/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_fafba41c-3551-402f-a567-53940df2ce77/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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:47:49,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:47:49,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:47:49,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:47:49,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:47:49,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:47:49,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:47:49,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:47:49,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:47:49,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:47:49,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:47:49,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:47:49,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:47:49,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:47:49,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:47:49,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:47:49,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:47:49,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:47:49,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:47:49,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:47:49,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:47:49,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:47:49,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:47:49,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:47:49,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:47:49,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:47:49,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:47:49,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:47:49,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:47:49,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:47:49,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:47:49,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:47:49,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:47:49,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:47:49,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:47:49,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:47:49,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:47:49,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:47:49,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:47:49,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:47:49,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:47:49,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:47:49,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:47:49,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:47:49,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:47:49,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:47:49,935 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:47:49,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:47:49,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:47:49,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:47:49,936 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:47:49,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:47:49,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:47:49,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:47:49,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:47:49,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:47:49,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:47:49,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:47:49,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:47:49,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:47:49,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:47:49,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:47:49,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:47:49,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:47:49,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:47:49,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:47:49,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:49,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:47:49,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:47:49,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:47:49,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:47:49,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:47:49,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:47:49,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:47:49,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:47:49,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:47:49,944 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_fafba41c-3551-402f-a567-53940df2ce77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2021-11-13 17:47:50,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:47:50,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:47:50,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:47:50,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:47:50,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:47:50,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-13 17:47:50,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/379faaa10/c5c9ef9ebb5944eab0809c3ebad19417/FLAGedc579a27 [2021-11-13 17:47:50,780 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:47:50,780 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-13 17:47:50,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/379faaa10/c5c9ef9ebb5944eab0809c3ebad19417/FLAGedc579a27 [2021-11-13 17:47:51,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/379faaa10/c5c9ef9ebb5944eab0809c3ebad19417 [2021-11-13 17:47:51,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:47:51,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:47:51,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:51,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:47:51,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:47:51,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b35237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51, skipping insertion in model container [2021-11-13 17:47:51,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:47:51,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:47:51,364 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_fafba41c-3551-402f-a567-53940df2ce77/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-13 17:47:51,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:51,394 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:47:51,413 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_fafba41c-3551-402f-a567-53940df2ce77/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-13 17:47:51,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:47:51,466 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:47:51,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51 WrapperNode [2021-11-13 17:47:51,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:47:51,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:51,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:47:51,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:47:51,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:47:51,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:47:51,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:47:51,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:47:51,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:47:51,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:47:51,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:47:51,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:47:51,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (1/1) ... [2021-11-13 17:47:51,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:47:51,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:51,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:47:51,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:47:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:47:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:47:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:47:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:47:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:47:51,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:47:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:47:51,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:47:51,897 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:47:51,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:51 BoogieIcfgContainer [2021-11-13 17:47:51,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:47:51,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:47:51,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:47:51,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:47:51,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:47:51" (1/3) ... [2021-11-13 17:47:51,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffaca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:51, skipping insertion in model container [2021-11-13 17:47:51,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:47:51" (2/3) ... [2021-11-13 17:47:51,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffaca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:51, skipping insertion in model container [2021-11-13 17:47:51,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:51" (3/3) ... [2021-11-13 17:47:51,921 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2021-11-13 17:47:51,927 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:47:51,927 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:47:51,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:47:51,983 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 17:47:51,984 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:47:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:47:52,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:52,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:52,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-11-13 17:47:52,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:52,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284266572] [2021-11-13 17:47:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:52,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:52,274 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 17:47:52,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:52,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284266572] [2021-11-13 17:47:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284266572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:52,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:52,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:47:52,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059177307] [2021-11-13 17:47:52,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:52,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:47:52,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:47:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:47:52,316 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 17:47:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:52,332 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-13 17:47:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:47:52,334 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 17:47:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:52,342 INFO L225 Difference]: With dead ends: 42 [2021-11-13 17:47:52,343 INFO L226 Difference]: Without dead ends: 19 [2021-11-13 17:47:52,349 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 17:47:52,358 INFO L933 BasicCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:52,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:47:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-13 17:47:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-13 17:47:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-13 17:47:52,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-13 17:47:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:52,400 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-13 17:47:52,400 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 17:47:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-13 17:47:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:47:52,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:52,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:52,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:47:52,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-11-13 17:47:52,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:52,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112996245] [2021-11-13 17:47:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:52,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:52,503 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 17:47:52,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:52,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112996245] [2021-11-13 17:47:52,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112996245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:52,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:52,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:47:52,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562598105] [2021-11-13 17:47:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:52,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:52,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:52,509 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:52,583 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-13 17:47:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 17:47:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:52,587 INFO L225 Difference]: With dead ends: 45 [2021-11-13 17:47:52,587 INFO L226 Difference]: Without dead ends: 31 [2021-11-13 17:47:52,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:52,590 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:52,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 60.88ms Time] [2021-11-13 17:47:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-13 17:47:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-13 17:47:52,596 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 17:47:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 17:47:52,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-13 17:47:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:52,603 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 17:47:52,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 17:47:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 17:47:52,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:52,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:52,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:47:52,609 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-11-13 17:47:52,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:52,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587294653] [2021-11-13 17:47:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:52,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:52,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:47:52,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252657564] [2021-11-13 17:47:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:52,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:52,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:52,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:52,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:47:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:52,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:47:52,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:47:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:47:53,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:53,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:53,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587294653] [2021-11-13 17:47:53,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:47:53,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252657564] [2021-11-13 17:47:53,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252657564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:53,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:53,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:47:53,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503401497] [2021-11-13 17:47:53,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:53,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:47:53,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:47:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:53,033 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 17:47:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:53,124 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-13 17:47:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:47:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-13 17:47:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:53,128 INFO L225 Difference]: With dead ends: 40 [2021-11-13 17:47:53,129 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 17:47:53,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:47:53,131 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.14ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:53,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 51.14ms Time] [2021-11-13 17:47:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 17:47:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-13 17:47:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-13 17:47:53,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-11-13 17:47:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:53,151 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-13 17:47:53,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 17:47:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-13 17:47:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 17:47:53,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:53,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:53,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:53,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:53,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-11-13 17:47:53,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:53,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534915449] [2021-11-13 17:47:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:53,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:53,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:47:53,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8836219] [2021-11-13 17:47:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:53,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:53,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:53,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:47:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:47:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:53,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:53,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:53,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534915449] [2021-11-13 17:47:53,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:47:53,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8836219] [2021-11-13 17:47:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8836219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:47:53,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:47:53,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-13 17:47:53,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447163613] [2021-11-13 17:47:53,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:47:53,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:47:53,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:47:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:47:53,730 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 17:47:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:53,925 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-13 17:47:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:47:53,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 21 [2021-11-13 17:47:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:53,931 INFO L225 Difference]: With dead ends: 70 [2021-11-13 17:47:53,931 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 17:47:53,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:47:53,941 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.51ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:53,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 5.51ms Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 124.27ms Time] [2021-11-13 17:47:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 17:47:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-11-13 17:47:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:47:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-13 17:47:53,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-11-13 17:47:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:53,957 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-13 17:47:53,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 17:47:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-13 17:47:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 17:47:53,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:53,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:53,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:54,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 17:47:54,175 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-11-13 17:47:54,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:54,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771443814] [2021-11-13 17:47:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:54,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:54,198 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:47:54,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006901537] [2021-11-13 17:47:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:54,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:54,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:54,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:54,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:47:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 17:47:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:54,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:47:54,529 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-13 17:47:54,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-11-13 17:47:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:47:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:01,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:48:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 115 [2021-11-13 17:48:01,596 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 42 treesize of output 33 [2021-11-13 17:48:01,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:48:01,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 266 [2021-11-13 17:48:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 17:48:01,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:01,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771443814] [2021-11-13 17:48:01,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:01,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006901537] [2021-11-13 17:48:01,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006901537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:48:01,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:01,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-11-13 17:48:01,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504890551] [2021-11-13 17:48:01,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:48:01,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:48:01,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:48:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=76, Unknown=3, NotChecked=0, Total=110 [2021-11-13 17:48:01,776 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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 17:48:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:03,618 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-11-13 17:48:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:48:03,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) Word has length 24 [2021-11-13 17:48:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:03,619 INFO L225 Difference]: With dead ends: 73 [2021-11-13 17:48:03,619 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 17:48:03,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=62, Invalid=144, Unknown=4, NotChecked=0, Total=210 [2021-11-13 17:48:03,620 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 137.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:03,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 77 Invalid, 155 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 58 Unchecked, 137.15ms Time] [2021-11-13 17:48:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 17:48:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-11-13 17:48:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 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 17:48:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-11-13 17:48:03,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2021-11-13 17:48:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:03,629 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-11-13 17:48:03,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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 17:48:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-11-13 17:48:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:48:03,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:03,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:03,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:03,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:03,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:03,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-11-13 17:48:03,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:03,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519692347] [2021-11-13 17:48:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:03,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:03,853 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:03,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479504155] [2021-11-13 17:48:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:03,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:03,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:03,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:03,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:48:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:03,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 17:48:03,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:03,976 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 17:48:04,030 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:48:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:04,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-13 17:48:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:04,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 17:48:04,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:04,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:04,391 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-13 17:48:04,391 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 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-13 17:48:04,688 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-13 17:48:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 38 [2021-11-13 17:48:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:04,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:05,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 131 treesize of output 127 [2021-11-13 17:48:05,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:05,631 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 3 [2021-11-13 17:48:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:05,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:05,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519692347] [2021-11-13 17:48:05,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:05,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479504155] [2021-11-13 17:48:05,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479504155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:48:05,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:05,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-13 17:48:05,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466325166] [2021-11-13 17:48:05,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:48:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 17:48:05,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 17:48:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:48:05,700 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 17:48:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:15,831 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-11-13 17:48:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 17:48:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 28 [2021-11-13 17:48:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:15,833 INFO L225 Difference]: With dead ends: 195 [2021-11-13 17:48:15,833 INFO L226 Difference]: Without dead ends: 164 [2021-11-13 17:48:15,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=421, Invalid=1384, Unknown=1, NotChecked=0, Total=1806 [2021-11-13 17:48:15,836 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 326 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1493.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.76ms SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1633.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:15,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 199 Invalid, 673 Unknown, 0 Unchecked, 6.76ms Time], IncrementalHoareTripleChecker [170 Valid, 409 Invalid, 0 Unknown, 94 Unchecked, 1633.51ms Time] [2021-11-13 17:48:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-13 17:48:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2021-11-13 17:48:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 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 17:48:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-11-13 17:48:15,851 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 28 [2021-11-13 17:48:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:15,852 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-11-13 17:48:15,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 17:48:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-11-13 17:48:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 17:48:15,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:15,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:15,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:16,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:16,079 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1242204926, now seen corresponding path program 2 times [2021-11-13 17:48:16,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:16,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250219244] [2021-11-13 17:48:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:16,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:16,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:16,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573475456] [2021-11-13 17:48:16,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:48:16,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:16,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:16,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:48:16,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:48:16,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:48:16,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:48:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:48:16,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:48:16,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:16,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250219244] [2021-11-13 17:48:16,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:16,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573475456] [2021-11-13 17:48:16,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573475456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:48:16,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:16,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-13 17:48:16,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103146691] [2021-11-13 17:48:16,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:48:16,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:48:16,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:48:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:48:16,431 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:16,624 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2021-11-13 17:48:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:48:16,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-13 17:48:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:16,627 INFO L225 Difference]: With dead ends: 192 [2021-11-13 17:48:16,627 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 17:48:16,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:48:16,629 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:16,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 62 Invalid, 169 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [69 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 140.59ms Time] [2021-11-13 17:48:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 17:48:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 104. [2021-11-13 17:48:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2427184466019416) internal successors, (128), 103 states have internal predecessors, (128), 0 states have call successors, (0), 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 17:48:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2021-11-13 17:48:16,660 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 30 [2021-11-13 17:48:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:16,662 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2021-11-13 17:48:16,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2021-11-13 17:48:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 17:48:16,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:16,667 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:16,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:16,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 17:48:16,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1847758638, now seen corresponding path program 3 times [2021-11-13 17:48:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:16,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025183117] [2021-11-13 17:48:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:16,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:16,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:16,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144876695] [2021-11-13 17:48:16,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:48:16,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:16,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:16,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:16,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:48:17,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 17:48:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:48:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 17:48:17,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:17,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:17,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025183117] [2021-11-13 17:48:17,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:48:17,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144876695] [2021-11-13 17:48:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144876695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:48:17,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:17,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-13 17:48:17,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811885215] [2021-11-13 17:48:17,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:48:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:48:17,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:48:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:48:17,477 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:17,801 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2021-11-13 17:48:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:48:17,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-13 17:48:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:17,804 INFO L225 Difference]: With dead ends: 231 [2021-11-13 17:48:17,804 INFO L226 Difference]: Without dead ends: 188 [2021-11-13 17:48:17,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-11-13 17:48:17,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 168 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.76ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:17,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 101 Invalid, 261 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [76 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 195.76ms Time] [2021-11-13 17:48:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-13 17:48:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 137. [2021-11-13 17:48:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 136 states have internal predecessors, (167), 0 states have call successors, (0), 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 17:48:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2021-11-13 17:48:17,822 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 33 [2021-11-13 17:48:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:17,822 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2021-11-13 17:48:17,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:48:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2021-11-13 17:48:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 17:48:17,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:17,824 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:17,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:18,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:18,050 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 4 times [2021-11-13 17:48:18,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:18,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490801268] [2021-11-13 17:48:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:18,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:18,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 17:48:18,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910635338] [2021-11-13 17:48:18,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 17:48:18,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:18,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:18,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:48:18,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 17:48:18,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:48:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 17:48:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:18,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:48:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:18,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:18,840 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-13 17:48:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 397 [2021-11-13 17:48:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:18,938 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 17:48:18,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 158 treesize of output 93 [2021-11-13 17:48:18,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 17:48:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,042 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 17:48:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 176 treesize of output 111 [2021-11-13 17:48:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,102 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 17:48:19,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 83 [2021-11-13 17:48:19,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,261 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-13 17:48:19,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 248 treesize of output 466 [2021-11-13 17:48:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,379 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:48:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 334 treesize of output 215 [2021-11-13 17:48:19,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 17:48:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,558 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:48:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 155 [2021-11-13 17:48:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,663 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-11-13 17:48:19,664 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 275 treesize of output 142 [2021-11-13 17:48:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:48:19,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:48:19,830 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:48:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 72 [2021-11-13 17:48:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:48:20,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:59,952 WARN L227 SmtUtils]: Spent 1.30m on a formula simplification. DAG size of input: 143 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:50:33,386 WARN L227 SmtUtils]: Spent 15.30s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 17:50:33,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:50:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45749 treesize of output 41955 [2021-11-13 17:50:34,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:34,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:34,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:34,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 4283 treesize of output 3563 [2021-11-13 17:50:35,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:35,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:35,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:35,785 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 4366 treesize of output 3862 [2021-11-13 17:50:35,913 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 3014 treesize of output 2798 [2021-11-13 17:50:35,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:35,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490801268] [2021-11-13 17:50:35,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 17:50:35,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910635338] [2021-11-13 17:50:35,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 17:50:35,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:35,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-13 17:50:35,927 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-13 17:50:35,927 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-13 17:50:35,933 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 17:50:35,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:36,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:36,154 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2021-11-13 17:50:36,160 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 17:50:36,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 05:50:36 BoogieIcfgContainer [2021-11-13 17:50:36,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 17:50:36,192 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 17:50:36,192 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 17:50:36,192 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 17:50:36,193 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:51" (3/4) ... [2021-11-13 17:50:36,196 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 17:50:36,196 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 17:50:36,197 INFO L158 Benchmark]: Toolchain (without parser) took 165052.89ms. Allocated memory was 98.6MB in the beginning and 134.2MB in the end (delta: 35.7MB). Free memory was 64.0MB in the beginning and 59.2MB in the end (delta: 4.8MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. [2021-11-13 17:50:36,198 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 98.6MB. Free memory was 51.3MB in the beginning and 51.2MB in the end (delta: 42.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:50:36,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.91ms. Allocated memory is still 98.6MB. Free memory was 63.6MB in the beginning and 72.1MB in the end (delta: -8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 17:50:36,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.43ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 70.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:50:36,199 INFO L158 Benchmark]: Boogie Preprocessor took 27.27ms. Allocated memory is still 98.6MB. Free memory was 70.5MB in the beginning and 69.1MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 17:50:36,200 INFO L158 Benchmark]: RCFGBuilder took 331.84ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 58.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 17:50:36,200 INFO L158 Benchmark]: TraceAbstraction took 164288.18ms. Allocated memory was 98.6MB in the beginning and 134.2MB in the end (delta: 35.7MB). Free memory was 57.8MB in the beginning and 60.1MB in the end (delta: -2.3MB). Peak memory consumption was 70.0MB. Max. memory is 16.1GB. [2021-11-13 17:50:36,201 INFO L158 Benchmark]: Witness Printer took 4.49ms. Allocated memory is still 134.2MB. Free memory was 60.1MB in the beginning and 59.2MB in the end (delta: 917.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 17:50:36,203 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 98.6MB. Free memory was 51.3MB in the beginning and 51.2MB in the end (delta: 42.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.91ms. Allocated memory is still 98.6MB. Free memory was 63.6MB in the beginning and 72.1MB in the end (delta: -8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.43ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 70.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.27ms. Allocated memory is still 98.6MB. Free memory was 70.5MB in the beginning and 69.1MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 331.84ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 58.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 164288.18ms. Allocated memory was 98.6MB in the beginning and 134.2MB in the end (delta: 35.7MB). Free memory was 57.8MB in the beginning and 60.1MB in the end (delta: -2.3MB). Peak memory consumption was 70.0MB. Max. memory is 16.1GB. * Witness Printer took 4.49ms. Allocated memory is still 134.2MB. Free memory was 60.1MB in the beginning and 59.2MB in the end (delta: 917.6kB). There was no memory consumed. 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] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] 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_fafba41c-3551-402f-a567-53940df2ce77/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 -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2021-11-13 17:50:39,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:50:39,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:50:39,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:50:39,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:50:39,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:50:39,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-13 17:50:39,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/ec5716bef/19e780834667444ba1f23d26a653ea9c/FLAGdaa57f9b0 [2021-11-13 17:50:39,899 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:50:39,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-13 17:50:39,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/ec5716bef/19e780834667444ba1f23d26a653ea9c/FLAGdaa57f9b0 [2021-11-13 17:50:40,261 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/data/ec5716bef/19e780834667444ba1f23d26a653ea9c [2021-11-13 17:50:40,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:50:40,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:50:40,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:50:40,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:50:40,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:50:40,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639ebc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40, skipping insertion in model container [2021-11-13 17:50:40,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:50:40,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:50:40,430 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_fafba41c-3551-402f-a567-53940df2ce77/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-13 17:50:40,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:50:40,478 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:50:40,498 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_fafba41c-3551-402f-a567-53940df2ce77/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-13 17:50:40,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:50:40,523 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:50:40,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40 WrapperNode [2021-11-13 17:50:40,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:50:40,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:50:40,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:50:40,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:50:40,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:50:40,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:50:40,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:50:40,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:50:40,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:50:40,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:50:40,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:50:40,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:50:40,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (1/1) ... [2021-11-13 17:50:40,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:50:40,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:40,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:50:40,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:50:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 17:50:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:50:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 17:50:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:50:40,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:50:40,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:50:40,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 17:50:41,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:50:41,213 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:50:41,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:50:41 BoogieIcfgContainer [2021-11-13 17:50:41,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:50:41,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:50:41,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:50:41,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:50:41,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:50:40" (1/3) ... [2021-11-13 17:50:41,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a89eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:50:41, skipping insertion in model container [2021-11-13 17:50:41,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:50:40" (2/3) ... [2021-11-13 17:50:41,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a89eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:50:41, skipping insertion in model container [2021-11-13 17:50:41,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:50:41" (3/3) ... [2021-11-13 17:50:41,223 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2021-11-13 17:50:41,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:50:41,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:50:41,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:50:41,319 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 17:50:41,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:50:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:50:41,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:41,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:41,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:41,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-11-13 17:50:41,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:50:41,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651557131] [2021-11-13 17:50:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:41,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:50:41,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:50:41,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:50:41,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 17:50:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 17:50:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:41,615 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 17:50:41,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:41,664 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 17:50:41,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:50:41,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651557131] [2021-11-13 17:50:41,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651557131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:41,666 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:41,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 17:50:41,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231066036] [2021-11-13 17:50:41,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:41,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:50:41,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:50:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:50:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:50:41,711 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 17:50:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:41,730 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-13 17:50:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:50:41,732 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 17:50:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:41,740 INFO L225 Difference]: With dead ends: 42 [2021-11-13 17:50:41,741 INFO L226 Difference]: Without dead ends: 19 [2021-11-13 17:50:41,744 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 17:50:41,748 INFO L933 BasicCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:41,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:50:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-13 17:50:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-13 17:50:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-13 17:50:41,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-13 17:50:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:41,790 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-13 17:50:41,791 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 17:50:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-13 17:50:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:50:41,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:41,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:41,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:42,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:50:42,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-11-13 17:50:42,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:50:42,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999216635] [2021-11-13 17:50:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:42,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:50:42,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:50:42,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:50:42,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 17:50:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:50:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:42,306 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 17:50:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:42,423 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 17:50:42,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:50:42,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999216635] [2021-11-13 17:50:42,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999216635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:42,424 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:42,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 17:50:42,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814208345] [2021-11-13 17:50:42,425 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:42,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:50:42,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:50:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:50:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:50:42,428 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 17:50:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:42,813 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-13 17:50:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:50:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 12 [2021-11-13 17:50:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:42,815 INFO L225 Difference]: With dead ends: 45 [2021-11-13 17:50:42,815 INFO L226 Difference]: Without dead ends: 31 [2021-11-13 17:50:42,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:50:42,817 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 248.50ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:42,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 13 Invalid, 60 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [25 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 248.50ms Time] [2021-11-13 17:50:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-13 17:50:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-13 17:50:42,831 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 17:50:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 17:50:42,832 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-13 17:50:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:42,833 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 17:50:42,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 17:50:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 17:50:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 17:50:42,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:42,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:42,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:43,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:50:43,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-11-13 17:50:43,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:50:43,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305228472] [2021-11-13 17:50:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:43,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:50:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:50:43,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:50:43,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 17:50:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:50:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:43,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:43,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:43,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:50:43,424 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 53 treesize of output 29 [2021-11-13 17:50:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:50:43,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:44,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2021-11-13 17:50:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:50:44,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:50:44,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305228472] [2021-11-13 17:50:44,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305228472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:44,202 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:44,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-11-13 17:50:44,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089193147] [2021-11-13 17:50:44,202 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:44,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:50:44,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:50:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:50:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:50:44,205 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:45,861 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-13 17:50:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:50:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-13 17:50:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:45,870 INFO L225 Difference]: With dead ends: 41 [2021-11-13 17:50:45,870 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 17:50:45,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:50:45,872 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1147.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1296.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:45,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 86 Invalid, 66 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 1296.48ms Time] [2021-11-13 17:50:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 17:50:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-11-13 17:50:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-13 17:50:45,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-11-13 17:50:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:45,881 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-13 17:50:45,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-13 17:50:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 17:50:45,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:45,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:45,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 17:50:46,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:50:46,098 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:46,099 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-11-13 17:50:46,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:50:46,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564253646] [2021-11-13 17:50:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:46,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:50:46,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:50:46,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:50:46,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 17:50:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:46,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 17:50:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:46,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:46,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:50:46,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564253646] [2021-11-13 17:50:46,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564253646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:50:46,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:50:46,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-13 17:50:46,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540488829] [2021-11-13 17:50:46,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:46,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 17:50:46,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:50:46,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 17:50:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:50:46,899 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:47,771 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-11-13 17:50:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:50:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 17:50:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:47,773 INFO L225 Difference]: With dead ends: 75 [2021-11-13 17:50:47,773 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 17:50:47,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-13 17:50:47,776 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 410.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.12ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 507.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:47,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 51 Invalid, 211 Unknown, 0 Unchecked, 4.12ms Time], IncrementalHoareTripleChecker [66 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 507.26ms Time] [2021-11-13 17:50:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 17:50:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-11-13 17:50:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-13 17:50:47,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2021-11-13 17:50:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:47,783 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-13 17:50:47,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-13 17:50:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 17:50:47,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:47,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:47,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:47,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 17:50:47,985 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-11-13 17:50:47,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:50:47,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50151133] [2021-11-13 17:50:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:47,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:50:47,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:50:47,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:50:47,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 17:50:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:48,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 17:50:48,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:48,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:50:48,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:50:48,456 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 17:50:48,457 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 87 treesize of output 71 [2021-11-13 17:50:48,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:50:48,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 69 [2021-11-13 17:50:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 17:50:48,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:56,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:50:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10132 treesize of output 9372 [2021-11-13 17:50:58,572 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-13 17:50:58,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9238283 treesize of output 8346635 [2021-11-13 17:51:15,900 WARN L227 SmtUtils]: Spent 17.30s on a formula simplification that was a NOOP. DAG size: 6469 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 17:51:16,369 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-13 17:51:16,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8346635 treesize of output 7243019 [2021-11-13 17:51:34,932 WARN L227 SmtUtils]: Spent 18.54s on a formula simplification that was a NOOP. DAG size: 6466 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 17:51:35,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 17:51:35,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50151133] [2021-11-13 17:51:35,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 17:51:35,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [995228836] [2021-11-13 17:51:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:35,141 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 17:51:35,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/cvc4 [2021-11-13 17:51:35,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 17:51:35,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-13 17:51:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:51:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:51:35,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:51:35,732 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 17:51:35,733 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 87 treesize of output 71 [2021-11-13 17:51:36,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:51:36,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 69 [2021-11-13 17:51:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:51:36,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:51:39,805 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 17:51:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5814 treesize of output 1 [2021-11-13 17:51:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 17:51:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [995228836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:51:39,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:51:39,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-13 17:51:39,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031526395] [2021-11-13 17:51:39,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:51:39,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 17:51:39,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 17:51:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 17:51:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=185, Unknown=4, NotChecked=0, Total=240 [2021-11-13 17:51:39,841 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 17:51:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:51:53,251 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-11-13 17:51:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:51:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-13 17:51:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:51:53,253 INFO L225 Difference]: With dead ends: 51 [2021-11-13 17:51:53,253 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 17:51:53,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=88, Invalid=324, Unknown=8, NotChecked=0, Total=420 [2021-11-13 17:51:53,255 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2619.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2800.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:51:53,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 140 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 16 Unchecked, 2800.09ms Time] [2021-11-13 17:51:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 17:51:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-13 17:51:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 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 17:51:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-13 17:51:53,266 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2021-11-13 17:51:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:51:53,266 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-13 17:51:53,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 17:51:53,267 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-13 17:51:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:51:53,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:51:53,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:51:53,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-13 17:51:53,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:51:53,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt [2021-11-13 17:51:53,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:51:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:51:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-11-13 17:51:53,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 17:51:53,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536370537] [2021-11-13 17:51:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:51:53,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 17:51:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 17:51:53,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 17:51:53,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fafba41c-3551-402f-a567-53940df2ce77/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 17:51:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:51:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 17:51:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:51:54,023 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 17:51:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 17:51:54,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-11-13 17:51:54,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 79 [2021-11-13 17:51:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:51:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:51:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:51:55,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:51:55,141 INFO L354 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2021-11-13 17:51:55,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 131 treesize of output 105 [2021-11-13 17:51:56,059 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-13 17:51:56,059 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 149 treesize of output 73 [2021-11-13 17:51:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:51:56,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:52:05,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:52:05,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 704229894 treesize of output 179417723 [2021-11-13 17:54:14,440 WARN L227 SmtUtils]: Spent 2.16m on a formula simplification that was a NOOP. DAG size: 1561 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 17:54:14,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:14,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:54:14,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:54:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:55:14,090 WARN L227 SmtUtils]: Spent 59.21s on a formula simplification. DAG size of input: 683 DAG size of output: 273 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 17:55:14,093 INFO L354 Elim1Store]: treesize reduction 7118, result has 12.1 percent of original size [2021-11-13 17:55:14,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 9 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 3671537198 treesize of output 3388419362