./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/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_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/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 64bit --witnessprinter.graph.data.programhash 5c13092b5fe0ffbf7fbf1fe31d493be6a68ca2455b811b10fd7983ff470e432f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:09:21,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:09:21,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:09:21,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:09:21,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:09:21,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:09:21,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:09:21,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:09:21,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:09:21,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:09:21,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:09:21,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:09:21,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:09:21,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:09:21,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:09:21,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:09:21,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:09:21,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:09:21,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:09:21,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:09:21,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:09:21,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:09:21,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:09:21,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:09:21,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:09:21,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:09:21,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:09:21,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:09:21,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:09:21,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:09:21,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:09:21,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:09:21,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:09:21,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:09:21,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:09:21,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:09:21,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:09:21,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:09:21,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:09:21,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:09:21,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:09:21,159 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:09:21,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:09:21,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:09:21,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:09:21,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:09:21,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:09:21,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:09:21,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:09:21,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:09:21,187 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:09:21,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:09:21,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:09:21,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:09:21,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:09:21,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:09:21,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:09:21,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:09:21,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:09:21,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:09:21,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:09:21,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:09:21,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:09:21,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:09:21,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:09:21,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:09:21,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:09:21,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:09:21,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:09:21,194 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:09:21,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:09:21,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:09:21,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:09:21,196 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_0b872665-d730-4cfa-a1e5-a1eb89b38114/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c13092b5fe0ffbf7fbf1fe31d493be6a68ca2455b811b10fd7983ff470e432f [2021-11-13 18:09:21,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:09:21,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:09:21,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:09:21,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:09:21,474 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:09:21,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-13 18:09:21,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/data/8e6202ee4/811199e4a5af4170902e11b2aaabc814/FLAGb31e5fba3 [2021-11-13 18:09:22,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:09:22,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-13 18:09:22,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/data/8e6202ee4/811199e4a5af4170902e11b2aaabc814/FLAGb31e5fba3 [2021-11-13 18:09:22,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/data/8e6202ee4/811199e4a5af4170902e11b2aaabc814 [2021-11-13 18:09:22,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:09:22,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:09:22,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:09:22,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:09:22,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:09:22,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:09:22" (1/1) ... [2021-11-13 18:09:22,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4063a6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:22, skipping insertion in model container [2021-11-13 18:09:22,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:09:22" (1/1) ... [2021-11-13 18:09:22,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:09:23,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:09:23,952 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_0b872665-d730-4cfa-a1e5-a1eb89b38114/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i[108030,108043] [2021-11-13 18:09:24,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:09:24,654 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:09:24,792 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_0b872665-d730-4cfa-a1e5-a1eb89b38114/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i[108030,108043] [2021-11-13 18:09:25,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:09:25,211 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:09:25,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25 WrapperNode [2021-11-13 18:09:25,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:09:25,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:09:25,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:09:25,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:09:25,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:09:25,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:09:25,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:09:25,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:09:25,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:09:25,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:09:25,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:09:25,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:09:25,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (1/1) ... [2021-11-13 18:09:25,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:09:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:25,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:09:25,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:09:25,809 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:09:25,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:09:25,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 18:09:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2021-11-13 18:09:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2021-11-13 18:09:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_8 [2021-11-13 18:09:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_8 [2021-11-13 18:09:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_5 [2021-11-13 18:09:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_5 [2021-11-13 18:09:25,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2021-11-13 18:09:25,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2021-11-13 18:09:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:09:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:09:25,812 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-13 18:09:25,812 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-13 18:09:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:09:25,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:09:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:09:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_20 [2021-11-13 18:09:25,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_20 [2021-11-13 18:09:25,813 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-13 18:09:25,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-13 18:09:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:09:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:09:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:09:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:09:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:09:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:09:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-13 18:09:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-13 18:09:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:09:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:09:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2021-11-13 18:09:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2021-11-13 18:09:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:09:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:09:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_resume [2021-11-13 18:09:25,815 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_resume [2021-11-13 18:09:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure kstrdup [2021-11-13 18:09:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrdup [2021-11-13 18:09:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-13 18:09:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-13 18:09:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_reset_resume [2021-11-13 18:09:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_reset_resume [2021-11-13 18:09:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:09:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:09:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:09:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:09:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:09:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-13 18:09:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-13 18:09:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:09:25,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:09:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:09:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:09:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:09:25,819 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:09:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:09:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 18:09:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 18:09:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_free_buffers [2021-11-13 18:09:25,821 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_free_buffers [2021-11-13 18:09:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_disconnect [2021-11-13 18:09:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_disconnect [2021-11-13 18:09:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_22 [2021-11-13 18:09:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_22 [2021-11-13 18:09:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 18:09:25,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 18:09:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:09:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:09:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2021-11-13 18:09:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2021-11-13 18:09:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-13 18:09:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-13 18:09:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 18:09:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 18:09:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-13 18:09:25,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-13 18:09:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:09:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 18:09:25,824 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 18:09:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_14 [2021-11-13 18:09:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_14 [2021-11-13 18:09:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_16 [2021-11-13 18:09:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_16 [2021-11-13 18:09:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2021-11-13 18:09:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2021-11-13 18:09:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_probe [2021-11-13 18:09:25,825 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_probe [2021-11-13 18:09:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:09:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure input_get_drvdata [2021-11-13 18:09:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure input_get_drvdata [2021-11-13 18:09:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:09:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2021-11-13 18:09:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2021-11-13 18:09:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_open [2021-11-13 18:09:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_open [2021-11-13 18:09:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_12 [2021-11-13 18:09:25,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_12 [2021-11-13 18:09:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:09:25,828 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:09:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:09:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:09:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-13 18:09:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-13 18:09:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_irq [2021-11-13 18:09:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_irq [2021-11-13 18:09:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:09:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:09:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_process_pkt [2021-11-13 18:09:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_process_pkt [2021-11-13 18:09:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:09:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:09:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2021-11-13 18:09:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2021-11-13 18:09:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-13 18:09:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-13 18:09:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:09:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure nexio_read_data [2021-11-13 18:09:25,833 INFO L138 BoogieDeclarations]: Found implementation of procedure nexio_read_data [2021-11-13 18:09:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-13 18:09:25,835 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-13 18:09:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 18:09:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:09:25,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:09:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:09:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:09:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2021-11-13 18:09:25,838 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2021-11-13 18:09:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_process_multi [2021-11-13 18:09:25,845 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_process_multi [2021-11-13 18:09:26,880 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:09:29,140 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 18:09:35,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:09:35,560 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:09:35,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:35 BoogieIcfgContainer [2021-11-13 18:09:35,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:09:35,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:09:35,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:09:35,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:09:35,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:09:22" (1/3) ... [2021-11-13 18:09:35,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2debd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:09:35, skipping insertion in model container [2021-11-13 18:09:35,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:09:25" (2/3) ... [2021-11-13 18:09:35,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2debd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:09:35, skipping insertion in model container [2021-11-13 18:09:35,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:09:35" (3/3) ... [2021-11-13 18:09:35,573 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-13 18:09:35,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:09:35,579 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:09:35,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:09:35,672 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 18:09:35,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:09:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 959 states, 694 states have (on average 1.3530259365994237) internal successors, (939), 713 states have internal predecessors, (939), 207 states have call successors, (207), 58 states have call predecessors, (207), 56 states have return successors, (201), 199 states have call predecessors, (201), 201 states have call successors, (201) [2021-11-13 18:09:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:09:35,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:35,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:35,743 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -528872520, now seen corresponding path program 1 times [2021-11-13 18:09:35,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:35,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618860591] [2021-11-13 18:09:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:35,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:09:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:36,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:09:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:36,559 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 18:09:36,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:36,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618860591] [2021-11-13 18:09:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618860591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:36,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:36,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:09:36,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259750129] [2021-11-13 18:09:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:36,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:09:36,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:09:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:09:36,623 INFO L87 Difference]: Start difference. First operand has 959 states, 694 states have (on average 1.3530259365994237) internal successors, (939), 713 states have internal predecessors, (939), 207 states have call successors, (207), 58 states have call predecessors, (207), 56 states have return successors, (201), 199 states have call predecessors, (201), 201 states have call successors, (201) Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:09:38,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:09:40,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:09:42,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:09:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:53,701 INFO L93 Difference]: Finished difference Result 3538 states and 5257 transitions. [2021-11-13 18:09:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:09:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-13 18:09:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:53,744 INFO L225 Difference]: With dead ends: 3538 [2021-11-13 18:09:53,745 INFO L226 Difference]: Without dead ends: 2560 [2021-11-13 18:09:53,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:53,772 INFO L933 BasicCegarLoop]: 1527 mSDtfsCounter, 3078 mSDsluCounter, 2292 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 1570 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14998.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3263 SdHoareTripleChecker+Valid, 3819 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 83.71ms SdHoareTripleChecker+Time, 1570 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16485.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:53,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3263 Valid, 3819 Invalid, 3732 Unknown, 0 Unchecked, 83.71ms Time], IncrementalHoareTripleChecker [1570 Valid, 2159 Invalid, 3 Unknown, 0 Unchecked, 16485.51ms Time] [2021-11-13 18:09:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-11-13 18:09:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1859. [2021-11-13 18:09:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1355 states have (on average 1.3424354243542436) internal successors, (1819), 1372 states have internal predecessors, (1819), 393 states have call successors, (393), 111 states have call predecessors, (393), 110 states have return successors, (387), 383 states have call predecessors, (387), 387 states have call successors, (387) [2021-11-13 18:09:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2599 transitions. [2021-11-13 18:09:54,046 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2599 transitions. Word has length 28 [2021-11-13 18:09:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:54,046 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2599 transitions. [2021-11-13 18:09:54,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:09:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2599 transitions. [2021-11-13 18:09:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:09:54,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:54,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:54,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:09:54,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash -118423946, now seen corresponding path program 1 times [2021-11-13 18:09:54,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:54,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837934795] [2021-11-13 18:09:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:54,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:09:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:54,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:09:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:54,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:09:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:09:54,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:54,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837934795] [2021-11-13 18:09:54,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837934795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:54,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:54,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:09:54,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581404919] [2021-11-13 18:09:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:54,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:09:54,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:54,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:09:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:09:54,353 INFO L87 Difference]: Start difference. First operand 1859 states and 2599 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:09:56,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:09:58,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:01,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:05,613 INFO L93 Difference]: Finished difference Result 2583 states and 3724 transitions. [2021-11-13 18:10:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:10:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-11-13 18:10:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:05,634 INFO L225 Difference]: With dead ends: 2583 [2021-11-13 18:10:05,635 INFO L226 Difference]: Without dead ends: 2570 [2021-11-13 18:10:05,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:05,638 INFO L933 BasicCegarLoop]: 1218 mSDtfsCounter, 2230 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 1015 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10267.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.09ms SdHoareTripleChecker+Time, 1015 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10996.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:05,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2355 Valid, 2242 Invalid, 2091 Unknown, 0 Unchecked, 30.09ms Time], IncrementalHoareTripleChecker [1015 Valid, 1074 Invalid, 2 Unknown, 0 Unchecked, 10996.77ms Time] [2021-11-13 18:10:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-11-13 18:10:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1859. [2021-11-13 18:10:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1355 states have (on average 1.3416974169741698) internal successors, (1818), 1372 states have internal predecessors, (1818), 393 states have call successors, (393), 111 states have call predecessors, (393), 110 states have return successors, (387), 383 states have call predecessors, (387), 387 states have call successors, (387) [2021-11-13 18:10:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2598 transitions. [2021-11-13 18:10:05,784 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2598 transitions. Word has length 38 [2021-11-13 18:10:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:05,785 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2598 transitions. [2021-11-13 18:10:05,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2598 transitions. [2021-11-13 18:10:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:10:05,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:05,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:05,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:10:05,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash -61165644, now seen corresponding path program 1 times [2021-11-13 18:10:05,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:05,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527972063] [2021-11-13 18:10:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:05,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:06,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:10:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:10:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:10:06,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527972063] [2021-11-13 18:10:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527972063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:06,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:06,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:10:06,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91592151] [2021-11-13 18:10:06,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:06,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:06,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:06,305 INFO L87 Difference]: Start difference. First operand 1859 states and 2598 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:08,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:10,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:20,695 INFO L93 Difference]: Finished difference Result 6942 states and 10376 transitions. [2021-11-13 18:10:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:10:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-11-13 18:10:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:20,748 INFO L225 Difference]: With dead ends: 6942 [2021-11-13 18:10:20,748 INFO L226 Difference]: Without dead ends: 5097 [2021-11-13 18:10:20,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:20,765 INFO L933 BasicCegarLoop]: 1462 mSDtfsCounter, 3209 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 1626 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12762.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3685 SdHoareTripleChecker+Invalid, 3808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.08ms SdHoareTripleChecker+Time, 1626 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13902.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:20,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3375 Valid, 3685 Invalid, 3808 Unknown, 0 Unchecked, 48.08ms Time], IncrementalHoareTripleChecker [1626 Valid, 2180 Invalid, 2 Unknown, 0 Unchecked, 13902.18ms Time] [2021-11-13 18:10:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-11-13 18:10:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 4246. [2021-11-13 18:10:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 3099 states have (on average 1.3262342691190707) internal successors, (4110), 3132 states have internal predecessors, (4110), 851 states have call successors, (851), 220 states have call predecessors, (851), 295 states have return successors, (1211), 909 states have call predecessors, (1211), 845 states have call successors, (1211) [2021-11-13 18:10:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 6172 transitions. [2021-11-13 18:10:21,110 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 6172 transitions. Word has length 38 [2021-11-13 18:10:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:21,112 INFO L470 AbstractCegarLoop]: Abstraction has 4246 states and 6172 transitions. [2021-11-13 18:10:21,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 6172 transitions. [2021-11-13 18:10:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:10:21,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:21,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:21,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:10:21,117 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1896633318, now seen corresponding path program 1 times [2021-11-13 18:10:21,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:21,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443926231] [2021-11-13 18:10:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:21,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:21,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:21,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:10:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:21,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:10:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:10:21,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:21,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443926231] [2021-11-13 18:10:21,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443926231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:21,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:21,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:10:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486283588] [2021-11-13 18:10:21,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:21,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:21,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:21,531 INFO L87 Difference]: Start difference. First operand 4246 states and 6172 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:23,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:25,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:32,125 INFO L93 Difference]: Finished difference Result 5088 states and 7602 transitions. [2021-11-13 18:10:32,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:10:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-11-13 18:10:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:32,169 INFO L225 Difference]: With dead ends: 5088 [2021-11-13 18:10:32,169 INFO L226 Difference]: Without dead ends: 5085 [2021-11-13 18:10:32,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:10:32,176 INFO L933 BasicCegarLoop]: 1179 mSDtfsCounter, 2230 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 1023 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9629.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.97ms SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10289.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:32,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2352 Valid, 2147 Invalid, 2086 Unknown, 0 Unchecked, 17.97ms Time], IncrementalHoareTripleChecker [1023 Valid, 1061 Invalid, 2 Unknown, 0 Unchecked, 10289.32ms Time] [2021-11-13 18:10:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-11-13 18:10:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 4245. [2021-11-13 18:10:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 3099 states have (on average 1.3259115843820588) internal successors, (4109), 3131 states have internal predecessors, (4109), 850 states have call successors, (850), 220 states have call predecessors, (850), 295 states have return successors, (1211), 909 states have call predecessors, (1211), 845 states have call successors, (1211) [2021-11-13 18:10:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 6170 transitions. [2021-11-13 18:10:32,466 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 6170 transitions. Word has length 39 [2021-11-13 18:10:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:32,468 INFO L470 AbstractCegarLoop]: Abstraction has 4245 states and 6170 transitions. [2021-11-13 18:10:32,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 6170 transitions. [2021-11-13 18:10:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:10:32,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:32,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:32,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:10:32,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1333415799, now seen corresponding path program 1 times [2021-11-13 18:10:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:32,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511606765] [2021-11-13 18:10:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:32,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:32,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:32,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:10:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:32,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:10:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:10:32,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:32,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511606765] [2021-11-13 18:10:32,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511606765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:32,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:32,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:10:32,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812296822] [2021-11-13 18:10:32,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:32,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:32,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:32,829 INFO L87 Difference]: Start difference. First operand 4245 states and 6170 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:34,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:37,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:42,416 INFO L93 Difference]: Finished difference Result 5087 states and 7600 transitions. [2021-11-13 18:10:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:10:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-13 18:10:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:42,458 INFO L225 Difference]: With dead ends: 5087 [2021-11-13 18:10:42,458 INFO L226 Difference]: Without dead ends: 5084 [2021-11-13 18:10:42,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:10:42,463 INFO L933 BasicCegarLoop]: 1184 mSDtfsCounter, 2217 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 1002 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8632.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.22ms SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9334.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:42,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2339 Valid, 2156 Invalid, 2079 Unknown, 0 Unchecked, 16.22ms Time], IncrementalHoareTripleChecker [1002 Valid, 1075 Invalid, 2 Unknown, 0 Unchecked, 9334.51ms Time] [2021-11-13 18:10:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-11-13 18:10:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 4244. [2021-11-13 18:10:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4244 states, 3099 states have (on average 1.325588899645047) internal successors, (4108), 3130 states have internal predecessors, (4108), 849 states have call successors, (849), 220 states have call predecessors, (849), 295 states have return successors, (1211), 909 states have call predecessors, (1211), 845 states have call successors, (1211) [2021-11-13 18:10:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4244 states to 4244 states and 6168 transitions. [2021-11-13 18:10:42,790 INFO L78 Accepts]: Start accepts. Automaton has 4244 states and 6168 transitions. Word has length 40 [2021-11-13 18:10:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:42,790 INFO L470 AbstractCegarLoop]: Abstraction has 4244 states and 6168 transitions. [2021-11-13 18:10:42,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4244 states and 6168 transitions. [2021-11-13 18:10:42,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:10:42,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:42,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:42,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:10:42,793 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1614271811, now seen corresponding path program 1 times [2021-11-13 18:10:42,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:42,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459255947] [2021-11-13 18:10:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:42,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:43,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:43,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:10:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:43,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:10:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:10:43,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:43,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459255947] [2021-11-13 18:10:43,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459255947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:43,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:43,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:10:43,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085654994] [2021-11-13 18:10:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:43,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:43,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:43,121 INFO L87 Difference]: Start difference. First operand 4244 states and 6168 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:45,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:47,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:56,543 INFO L93 Difference]: Finished difference Result 14347 states and 21990 transitions. [2021-11-13 18:10:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:10:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-13 18:10:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:56,625 INFO L225 Difference]: With dead ends: 14347 [2021-11-13 18:10:56,625 INFO L226 Difference]: Without dead ends: 10117 [2021-11-13 18:10:56,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:56,658 INFO L933 BasicCegarLoop]: 1397 mSDtfsCounter, 3132 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 1606 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11884.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3295 SdHoareTripleChecker+Valid, 3667 SdHoareTripleChecker+Invalid, 3678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.71ms SdHoareTripleChecker+Time, 1606 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12917.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:56,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3295 Valid, 3667 Invalid, 3678 Unknown, 0 Unchecked, 31.71ms Time], IncrementalHoareTripleChecker [1606 Valid, 2070 Invalid, 2 Unknown, 0 Unchecked, 12917.77ms Time] [2021-11-13 18:10:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10117 states. [2021-11-13 18:10:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10117 to 8695. [2021-11-13 18:10:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8695 states, 6351 states have (on average 1.3254605573925367) internal successors, (8418), 6411 states have internal predecessors, (8418), 1726 states have call successors, (1726), 435 states have call predecessors, (1726), 617 states have return successors, (2913), 1880 states have call predecessors, (2913), 1719 states have call successors, (2913) [2021-11-13 18:10:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8695 states to 8695 states and 13057 transitions. [2021-11-13 18:10:57,372 INFO L78 Accepts]: Start accepts. Automaton has 8695 states and 13057 transitions. Word has length 41 [2021-11-13 18:10:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:57,373 INFO L470 AbstractCegarLoop]: Abstraction has 8695 states and 13057 transitions. [2021-11-13 18:10:57,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 8695 states and 13057 transitions. [2021-11-13 18:10:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 18:10:57,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:57,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:57,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:10:57,375 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:57,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1496697658, now seen corresponding path program 1 times [2021-11-13 18:10:57,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:57,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489369634] [2021-11-13 18:10:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:57,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:57,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:10:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:57,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:10:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:10:57,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:57,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489369634] [2021-11-13 18:10:57,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489369634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:57,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:57,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:10:57,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318035198] [2021-11-13 18:10:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:57,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:57,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:57,638 INFO L87 Difference]: Start difference. First operand 8695 states and 13057 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:59,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:01,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:07,768 INFO L93 Difference]: Finished difference Result 10085 states and 15441 transitions. [2021-11-13 18:11:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:11:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2021-11-13 18:11:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:07,832 INFO L225 Difference]: With dead ends: 10085 [2021-11-13 18:11:07,832 INFO L226 Difference]: Without dead ends: 10073 [2021-11-13 18:11:07,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:07,840 INFO L933 BasicCegarLoop]: 1168 mSDtfsCounter, 2200 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 1008 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8994.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.73ms SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9677.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:07,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2328 Valid, 2153 Invalid, 2078 Unknown, 0 Unchecked, 16.73ms Time], IncrementalHoareTripleChecker [1008 Valid, 1068 Invalid, 2 Unknown, 0 Unchecked, 9677.96ms Time] [2021-11-13 18:11:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10073 states. [2021-11-13 18:11:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10073 to 8685. [2021-11-13 18:11:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 6342 states have (on average 1.325291706086408) internal successors, (8405), 6401 states have internal predecessors, (8405), 1725 states have call successors, (1725), 435 states have call predecessors, (1725), 617 states have return successors, (2913), 1880 states have call predecessors, (2913), 1719 states have call successors, (2913) [2021-11-13 18:11:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 13043 transitions. [2021-11-13 18:11:08,581 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 13043 transitions. Word has length 42 [2021-11-13 18:11:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:08,581 INFO L470 AbstractCegarLoop]: Abstraction has 8685 states and 13043 transitions. [2021-11-13 18:11:08,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:11:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 13043 transitions. [2021-11-13 18:11:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 18:11:08,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:08,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:08,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:11:08,598 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1218058086, now seen corresponding path program 1 times [2021-11-13 18:11:08,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:08,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776740691] [2021-11-13 18:11:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:08,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:11:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:11:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:11:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 18:11:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:11:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:11:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:11:08,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:08,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776740691] [2021-11-13 18:11:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776740691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:08,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:08,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:11:08,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200764554] [2021-11-13 18:11:08,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:08,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:11:08,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:11:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:08,962 INFO L87 Difference]: Start difference. First operand 8685 states and 13043 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:11:11,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:13,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:15,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:23,136 INFO L93 Difference]: Finished difference Result 21527 states and 33496 transitions. [2021-11-13 18:11:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:11:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-13 18:11:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:23,268 INFO L225 Difference]: With dead ends: 21527 [2021-11-13 18:11:23,268 INFO L226 Difference]: Without dead ends: 12856 [2021-11-13 18:11:23,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:11:23,318 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 2699 mSDsluCounter, 2902 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 1842 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12307.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2821 SdHoareTripleChecker+Valid, 4164 SdHoareTripleChecker+Invalid, 4227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.43ms SdHoareTripleChecker+Time, 1842 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13336.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2821 Valid, 4164 Invalid, 4227 Unknown, 0 Unchecked, 32.43ms Time], IncrementalHoareTripleChecker [1842 Valid, 2382 Invalid, 3 Unknown, 0 Unchecked, 13336.13ms Time] [2021-11-13 18:11:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12856 states. [2021-11-13 18:11:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12856 to 10655. [2021-11-13 18:11:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 7772 states have (on average 1.3117601646937724) internal successors, (10195), 7825 states have internal predecessors, (10195), 2063 states have call successors, (2063), 437 states have call predecessors, (2063), 819 states have return successors, (4329), 2428 states have call predecessors, (4329), 2057 states have call successors, (4329) [2021-11-13 18:11:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 16587 transitions. [2021-11-13 18:11:24,240 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 16587 transitions. Word has length 87 [2021-11-13 18:11:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:24,241 INFO L470 AbstractCegarLoop]: Abstraction has 10655 states and 16587 transitions. [2021-11-13 18:11:24,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:11:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 16587 transitions. [2021-11-13 18:11:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 18:11:24,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:24,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:24,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:11:24,252 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash 284695211, now seen corresponding path program 1 times [2021-11-13 18:11:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:24,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952658707] [2021-11-13 18:11:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:24,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:11:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:11:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:11:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:11:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 18:11:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:11:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:11:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 18:11:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:11:24,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:24,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952658707] [2021-11-13 18:11:24,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952658707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:24,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:24,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:11:24,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909851757] [2021-11-13 18:11:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:24,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:11:24,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:11:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:11:24,717 INFO L87 Difference]: Start difference. First operand 10655 states and 16587 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (19), 7 states have call predecessors, (19), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:11:26,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:28,906 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:47,483 INFO L93 Difference]: Finished difference Result 37680 states and 59681 transitions. [2021-11-13 18:11:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:11:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (19), 7 states have call predecessors, (19), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2021-11-13 18:11:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:47,633 INFO L225 Difference]: With dead ends: 37680 [2021-11-13 18:11:47,633 INFO L226 Difference]: Without dead ends: 27047 [2021-11-13 18:11:47,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:11:47,685 INFO L933 BasicCegarLoop]: 2111 mSDtfsCounter, 3745 mSDsluCounter, 5136 mSDsCounter, 0 mSdLazyCounter, 5257 mSolverCounterSat, 2815 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19310.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3958 SdHoareTripleChecker+Valid, 7247 SdHoareTripleChecker+Invalid, 8074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 65.41ms SdHoareTripleChecker+Time, 2815 IncrementalHoareTripleChecker+Valid, 5257 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20955.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:47,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3958 Valid, 7247 Invalid, 8074 Unknown, 0 Unchecked, 65.41ms Time], IncrementalHoareTripleChecker [2815 Valid, 5257 Invalid, 2 Unknown, 0 Unchecked, 20955.94ms Time] [2021-11-13 18:11:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27047 states. [2021-11-13 18:11:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27047 to 21017. [2021-11-13 18:11:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 15308 states have (on average 1.3080742095636269) internal successors, (20024), 15419 states have internal predecessors, (20024), 4061 states have call successors, (4061), 865 states have call predecessors, (4061), 1647 states have return successors, (8447), 4804 states have call predecessors, (8447), 4055 states have call successors, (8447) [2021-11-13 18:11:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 32532 transitions. [2021-11-13 18:11:49,718 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 32532 transitions. Word has length 127 [2021-11-13 18:11:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:49,719 INFO L470 AbstractCegarLoop]: Abstraction has 21017 states and 32532 transitions. [2021-11-13 18:11:49,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (19), 7 states have call predecessors, (19), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:11:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 32532 transitions. [2021-11-13 18:11:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 18:11:49,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:49,730 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:49,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:11:49,730 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1479920862, now seen corresponding path program 1 times [2021-11-13 18:11:49,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:49,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031583808] [2021-11-13 18:11:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:49,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:49,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:49,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:11:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:11:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:11:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:11:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:11:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:11:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:11:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:11:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:11:50,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:50,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031583808] [2021-11-13 18:11:50,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031583808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:50,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:50,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:11:50,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349515982] [2021-11-13 18:11:50,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:50,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:11:50,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:11:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:11:50,249 INFO L87 Difference]: Start difference. First operand 21017 states and 32532 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (20), 7 states have call predecessors, (20), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:11:52,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:54,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:56,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:58,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:00,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:19,999 INFO L93 Difference]: Finished difference Result 61339 states and 96725 transitions. [2021-11-13 18:12:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:12:20,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (20), 7 states have call predecessors, (20), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2021-11-13 18:12:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:20,418 INFO L225 Difference]: With dead ends: 61339 [2021-11-13 18:12:20,418 INFO L226 Difference]: Without dead ends: 40344 [2021-11-13 18:12:20,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:12:20,527 INFO L933 BasicCegarLoop]: 2156 mSDtfsCounter, 4717 mSDsluCounter, 4900 mSDsCounter, 0 mSdLazyCounter, 5097 mSolverCounterSat, 3656 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24978.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4932 SdHoareTripleChecker+Valid, 7056 SdHoareTripleChecker+Invalid, 8758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 62.42ms SdHoareTripleChecker+Time, 3656 IncrementalHoareTripleChecker+Valid, 5097 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26979.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:20,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4932 Valid, 7056 Invalid, 8758 Unknown, 0 Unchecked, 62.42ms Time], IncrementalHoareTripleChecker [3656 Valid, 5097 Invalid, 5 Unknown, 0 Unchecked, 26979.58ms Time] [2021-11-13 18:12:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40344 states. [2021-11-13 18:12:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40344 to 31339. [2021-11-13 18:12:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31339 states, 22816 states have (on average 1.3071967040673211) internal successors, (29825), 22981 states have internal predecessors, (29825), 6055 states have call successors, (6055), 1293 states have call predecessors, (6055), 2467 states have return successors, (12553), 7172 states have call predecessors, (12553), 6049 states have call successors, (12553) [2021-11-13 18:12:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31339 states to 31339 states and 48433 transitions. [2021-11-13 18:12:23,072 INFO L78 Accepts]: Start accepts. Automaton has 31339 states and 48433 transitions. Word has length 139 [2021-11-13 18:12:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:23,074 INFO L470 AbstractCegarLoop]: Abstraction has 31339 states and 48433 transitions. [2021-11-13 18:12:23,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (20), 7 states have call predecessors, (20), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:12:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31339 states and 48433 transitions. [2021-11-13 18:12:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 18:12:23,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:23,091 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:12:23,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:12:23,092 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash 2003937451, now seen corresponding path program 1 times [2021-11-13 18:12:23,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:12:23,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985134690] [2021-11-13 18:12:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:23,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:12:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:12:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:12:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:12:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:12:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:12:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:12:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:12:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:12:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 18:12:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:12:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:12:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:12:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:12:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-13 18:12:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:12:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:12:23,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:12:23,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985134690] [2021-11-13 18:12:23,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985134690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:23,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:23,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 18:12:23,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57206748] [2021-11-13 18:12:23,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:23,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:12:23,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:12:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:12:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:12:23,771 INFO L87 Difference]: Start difference. First operand 31339 states and 48433 transitions. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 9 states have call predecessors, (20), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:12:25,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:27,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:30,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:32,230 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:34,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:36,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:38,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:18,461 INFO L93 Difference]: Finished difference Result 114846 states and 200732 transitions. [2021-11-13 18:13:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:13:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 9 states have call predecessors, (20), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-11-13 18:13:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:19,156 INFO L225 Difference]: With dead ends: 114846 [2021-11-13 18:13:19,156 INFO L226 Difference]: Without dead ends: 83529 [2021-11-13 18:13:19,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=1537, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:13:19,322 INFO L933 BasicCegarLoop]: 2408 mSDtfsCounter, 8055 mSDsluCounter, 11668 mSDsCounter, 0 mSdLazyCounter, 14792 mSolverCounterSat, 8691 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44398.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8271 SdHoareTripleChecker+Valid, 14076 SdHoareTripleChecker+Invalid, 23490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 175.41ms SdHoareTripleChecker+Time, 8691 IncrementalHoareTripleChecker+Valid, 14792 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48261.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:19,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8271 Valid, 14076 Invalid, 23490 Unknown, 0 Unchecked, 175.41ms Time], IncrementalHoareTripleChecker [8691 Valid, 14792 Invalid, 7 Unknown, 0 Unchecked, 48261.01ms Time] [2021-11-13 18:13:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83529 states. [2021-11-13 18:13:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83529 to 34197. [2021-11-13 18:13:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34197 states, 24724 states have (on average 1.3036320983659602) internal successors, (32231), 24799 states have internal predecessors, (32231), 6865 states have call successors, (6865), 1293 states have call predecessors, (6865), 2607 states have return successors, (14493), 8224 states have call predecessors, (14493), 6859 states have call successors, (14493) [2021-11-13 18:13:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34197 states to 34197 states and 53589 transitions. [2021-11-13 18:13:23,856 INFO L78 Accepts]: Start accepts. Automaton has 34197 states and 53589 transitions. Word has length 145 [2021-11-13 18:13:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:23,857 INFO L470 AbstractCegarLoop]: Abstraction has 34197 states and 53589 transitions. [2021-11-13 18:13:23,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 9 states have call predecessors, (20), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:13:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 34197 states and 53589 transitions. [2021-11-13 18:13:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 18:13:23,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:23,868 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:23,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:13:23,869 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:23,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2075886927, now seen corresponding path program 1 times [2021-11-13 18:13:23,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:23,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31604074] [2021-11-13 18:13:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:23,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:13:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:13:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:13:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:13:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:13:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:13:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-13 18:13:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:13:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:13:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-13 18:13:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:13:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-13 18:13:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:13:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-13 18:13:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:13:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:13:24,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:24,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31604074] [2021-11-13 18:13:24,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31604074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:24,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:24,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 18:13:24,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131819090] [2021-11-13 18:13:24,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:24,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:13:24,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:13:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:13:24,477 INFO L87 Difference]: Start difference. First operand 34197 states and 53589 transitions. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (19), 9 states have call predecessors, (19), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:13:26,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:28,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:31,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:33,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:14:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:14,962 INFO L93 Difference]: Finished difference Result 117760 states and 205960 transitions. [2021-11-13 18:14:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:14:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (19), 9 states have call predecessors, (19), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 143 [2021-11-13 18:14:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:15,657 INFO L225 Difference]: With dead ends: 117760 [2021-11-13 18:14:15,657 INFO L226 Difference]: Without dead ends: 83585 [2021-11-13 18:14:15,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=1537, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:14:15,763 INFO L933 BasicCegarLoop]: 2463 mSDtfsCounter, 7745 mSDsluCounter, 12121 mSDsCounter, 0 mSdLazyCounter, 14615 mSolverCounterSat, 8332 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39376.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7947 SdHoareTripleChecker+Valid, 14584 SdHoareTripleChecker+Invalid, 22951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 148.55ms SdHoareTripleChecker+Time, 8332 IncrementalHoareTripleChecker+Valid, 14615 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42932.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:15,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7947 Valid, 14584 Invalid, 22951 Unknown, 0 Unchecked, 148.55ms Time], IncrementalHoareTripleChecker [8332 Valid, 14615 Invalid, 4 Unknown, 0 Unchecked, 42932.41ms Time] [2021-11-13 18:14:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83585 states. [2021-11-13 18:14:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83585 to 34197. [2021-11-13 18:14:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34197 states, 24724 states have (on average 1.3036320983659602) internal successors, (32231), 24799 states have internal predecessors, (32231), 6865 states have call successors, (6865), 1293 states have call predecessors, (6865), 2607 states have return successors, (14493), 8224 states have call predecessors, (14493), 6859 states have call successors, (14493) [2021-11-13 18:14:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34197 states to 34197 states and 53589 transitions. [2021-11-13 18:14:19,783 INFO L78 Accepts]: Start accepts. Automaton has 34197 states and 53589 transitions. Word has length 143 [2021-11-13 18:14:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:19,784 INFO L470 AbstractCegarLoop]: Abstraction has 34197 states and 53589 transitions. [2021-11-13 18:14:19,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (19), 9 states have call predecessors, (19), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:14:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34197 states and 53589 transitions. [2021-11-13 18:14:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-13 18:14:19,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:19,793 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:14:19,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:14:19,793 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1955873626, now seen corresponding path program 1 times [2021-11-13 18:14:19,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:14:19,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33303196] [2021-11-13 18:14:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:19,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:14:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:14:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:14:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:14:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:14:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:14:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:14:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:14:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:14:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:14:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:14:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 18:14:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 18:14:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:14:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:14:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 18:14:20,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:14:20,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33303196] [2021-11-13 18:14:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33303196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:14:20,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591834606] [2021-11-13 18:14:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:20,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:14:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:14:20,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:14:20,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:14:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 3594 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-13 18:14:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:14:39,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:14:40,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591834606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:14:40,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:14:40,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2021-11-13 18:14:40,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404771513] [2021-11-13 18:14:40,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:14:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:14:40,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:14:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:14:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:14:40,363 INFO L87 Difference]: Start difference. First operand 34197 states and 53589 transitions. Second operand has 27 states, 27 states have (on average 6.222222222222222) internal successors, (168), 14 states have internal predecessors, (168), 4 states have call successors, (44), 8 states have call predecessors, (44), 9 states have return successors, (36), 11 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-13 18:14:42,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:14:44,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:14:56,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:15:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:14,557 INFO L93 Difference]: Finished difference Result 82336 states and 141569 transitions. [2021-11-13 18:15:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:15:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.222222222222222) internal successors, (168), 14 states have internal predecessors, (168), 4 states have call successors, (44), 8 states have call predecessors, (44), 9 states have return successors, (36), 11 states have call predecessors, (36), 4 states have call successors, (36) Word has length 169 [2021-11-13 18:15:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:15,087 INFO L225 Difference]: With dead ends: 82336 [2021-11-13 18:15:15,088 INFO L226 Difference]: Without dead ends: 48113 [2021-11-13 18:15:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:15:15,322 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 2409 mSDsluCounter, 16037 mSDsCounter, 0 mSdLazyCounter, 8278 mSolverCounterSat, 1805 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27149.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 17180 SdHoareTripleChecker+Invalid, 10085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 100.26ms SdHoareTripleChecker+Time, 1805 IncrementalHoareTripleChecker+Valid, 8278 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29529.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2520 Valid, 17180 Invalid, 10085 Unknown, 0 Unchecked, 100.26ms Time], IncrementalHoareTripleChecker [1805 Valid, 8278 Invalid, 2 Unknown, 0 Unchecked, 29529.20ms Time] [2021-11-13 18:15:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48113 states. [2021-11-13 18:15:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48113 to 34533. [2021-11-13 18:15:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34533 states, 24964 states have (on average 1.3007130267585323) internal successors, (32471), 25039 states have internal predecessors, (32471), 6889 states have call successors, (6889), 1293 states have call predecessors, (6889), 2679 states have return successors, (14877), 8320 states have call predecessors, (14877), 6883 states have call successors, (14877) [2021-11-13 18:15:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34533 states to 34533 states and 54237 transitions. [2021-11-13 18:15:18,275 INFO L78 Accepts]: Start accepts. Automaton has 34533 states and 54237 transitions. Word has length 169 [2021-11-13 18:15:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:18,275 INFO L470 AbstractCegarLoop]: Abstraction has 34533 states and 54237 transitions. [2021-11-13 18:15:18,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.222222222222222) internal successors, (168), 14 states have internal predecessors, (168), 4 states have call successors, (44), 8 states have call predecessors, (44), 9 states have return successors, (36), 11 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-13 18:15:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 34533 states and 54237 transitions. [2021-11-13 18:15:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-13 18:15:18,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:18,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:18,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:18,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:15:18,512 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -687258362, now seen corresponding path program 1 times [2021-11-13 18:15:18,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:15:18,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045522940] [2021-11-13 18:15:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:18,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:15:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:15:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:18,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:15:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:15:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:15:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-13 18:15:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:15:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 18:15:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:15:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:15:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:15:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 18:15:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:19,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:15:19,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045522940] [2021-11-13 18:15:19,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045522940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:19,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:19,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 18:15:19,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190984650] [2021-11-13 18:15:19,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:15:19,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:15:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:15:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:15:19,257 INFO L87 Difference]: Start difference. First operand 34533 states and 54237 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:15:21,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:15:23,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:15:36,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:36,182 INFO L93 Difference]: Finished difference Result 82576 states and 141485 transitions. [2021-11-13 18:15:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:15:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 181 [2021-11-13 18:15:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:36,618 INFO L225 Difference]: With dead ends: 82576 [2021-11-13 18:15:36,618 INFO L226 Difference]: Without dead ends: 48065 [2021-11-13 18:15:36,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:15:36,826 INFO L933 BasicCegarLoop]: 1155 mSDtfsCounter, 2885 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 2172 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11792.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2993 SdHoareTripleChecker+Valid, 4430 SdHoareTripleChecker+Invalid, 4387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.26ms SdHoareTripleChecker+Time, 2172 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12838.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:36,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2993 Valid, 4430 Invalid, 4387 Unknown, 0 Unchecked, 34.26ms Time], IncrementalHoareTripleChecker [2172 Valid, 2213 Invalid, 2 Unknown, 0 Unchecked, 12838.03ms Time] [2021-11-13 18:15:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48065 states. [2021-11-13 18:15:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48065 to 34581. [2021-11-13 18:15:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34581 states, 25012 states have (on average 1.3001359347513193) internal successors, (32519), 25087 states have internal predecessors, (32519), 6889 states have call successors, (6889), 1293 states have call predecessors, (6889), 2679 states have return successors, (14877), 8320 states have call predecessors, (14877), 6883 states have call successors, (14877) [2021-11-13 18:15:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34581 states to 34581 states and 54285 transitions. [2021-11-13 18:15:39,945 INFO L78 Accepts]: Start accepts. Automaton has 34581 states and 54285 transitions. Word has length 181 [2021-11-13 18:15:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:39,946 INFO L470 AbstractCegarLoop]: Abstraction has 34581 states and 54285 transitions. [2021-11-13 18:15:39,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 8 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:15:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 34581 states and 54285 transitions. [2021-11-13 18:15:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-13 18:15:39,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:39,955 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:39,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:15:39,955 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1804226098, now seen corresponding path program 1 times [2021-11-13 18:15:39,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:15:39,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143558421] [2021-11-13 18:15:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:39,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:15:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:15:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:15:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:15:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:15:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:15:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:15:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:15:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-13 18:15:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:15:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:15:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:15:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:15:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:15:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-13 18:15:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:15:41,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:15:41,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143558421] [2021-11-13 18:15:41,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143558421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:41,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:41,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-13 18:15:41,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783497841] [2021-11-13 18:15:41,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:41,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:15:41,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:15:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:15:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:15:41,047 INFO L87 Difference]: Start difference. First operand 34581 states and 54285 transitions. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (21), 8 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-13 18:15:43,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:15:45,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:15:47,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:16:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:16:04,248 INFO L93 Difference]: Finished difference Result 82540 states and 138529 transitions. [2021-11-13 18:16:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:16:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (21), 8 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) Word has length 194 [2021-11-13 18:16:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:16:04,559 INFO L225 Difference]: With dead ends: 82540 [2021-11-13 18:16:04,559 INFO L226 Difference]: Without dead ends: 47981 [2021-11-13 18:16:05,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:16:05,008 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 1580 mSDsluCounter, 5356 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 1080 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17700.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 6499 SdHoareTripleChecker+Invalid, 4480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.07ms SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19144.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:16:05,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 6499 Invalid, 4480 Unknown, 0 Unchecked, 43.07ms Time], IncrementalHoareTripleChecker [1080 Valid, 3397 Invalid, 3 Unknown, 0 Unchecked, 19144.17ms Time] [2021-11-13 18:16:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47981 states. [2021-11-13 18:16:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47981 to 34701. [2021-11-13 18:16:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34701 states, 25108 states have (on average 1.299944240879401) internal successors, (32639), 25159 states have internal predecessors, (32639), 6913 states have call successors, (6913), 1293 states have call predecessors, (6913), 2679 states have return successors, (14901), 8368 states have call predecessors, (14901), 6907 states have call successors, (14901) [2021-11-13 18:16:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34701 states to 34701 states and 54453 transitions. [2021-11-13 18:16:07,925 INFO L78 Accepts]: Start accepts. Automaton has 34701 states and 54453 transitions. Word has length 194 [2021-11-13 18:16:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:16:07,926 INFO L470 AbstractCegarLoop]: Abstraction has 34701 states and 54453 transitions. [2021-11-13 18:16:07,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 4 states have internal predecessors, (115), 3 states have call successors, (21), 8 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-13 18:16:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34701 states and 54453 transitions. [2021-11-13 18:16:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-13 18:16:07,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:16:07,935 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:16:07,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:16:07,935 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:16:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:16:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 999633012, now seen corresponding path program 2 times [2021-11-13 18:16:07,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:16:07,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539149698] [2021-11-13 18:16:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:16:07,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:16:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:16:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:16:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:16:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:16:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:16:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:16:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:16:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:16:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:16:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:08,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:16:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:16:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:16:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:16:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:16:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:16:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:16:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:16:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-13 18:16:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:16:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 18:16:09,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:16:09,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539149698] [2021-11-13 18:16:09,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539149698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:16:09,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441061380] [2021-11-13 18:16:09,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:16:09,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:16:09,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:16:09,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:16:09,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:18:57,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:18:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:18:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 3684 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:18:58,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:18:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:18:59,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:18:59,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441061380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:18:59,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:18:59,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 26 [2021-11-13 18:18:59,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389055531] [2021-11-13 18:18:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:18:59,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:18:59,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:18:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:18:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:18:59,313 INFO L87 Difference]: Start difference. First operand 34701 states and 54453 transitions. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 9 states have internal predecessors, (116), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 18:19:01,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:05,570 INFO L93 Difference]: Finished difference Result 71037 states and 118625 transitions. [2021-11-13 18:19:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:19:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 9 states have internal predecessors, (116), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) Word has length 194 [2021-11-13 18:19:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:05,936 INFO L225 Difference]: With dead ends: 71037 [2021-11-13 18:19:05,936 INFO L226 Difference]: Without dead ends: 36358 [2021-11-13 18:19:06,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:19:06,128 INFO L933 BasicCegarLoop]: 2652 mSDtfsCounter, 1494 mSDsluCounter, 22525 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2581.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 25177 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.90ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2782.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:06,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 25177 Invalid, 423 Unknown, 0 Unchecked, 34.90ms Time], IncrementalHoareTripleChecker [63 Valid, 359 Invalid, 1 Unknown, 0 Unchecked, 2782.26ms Time] [2021-11-13 18:19:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36358 states. [2021-11-13 18:19:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36358 to 36220. [2021-11-13 18:19:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36220 states, 26195 states have (on average 1.2993701087993892) internal successors, (34037), 26246 states have internal predecessors, (34037), 7309 states have call successors, (7309), 1293 states have call predecessors, (7309), 2715 states have return successors, (16063), 8800 states have call predecessors, (16063), 7303 states have call successors, (16063) [2021-11-13 18:19:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36220 states to 36220 states and 57409 transitions. [2021-11-13 18:19:09,380 INFO L78 Accepts]: Start accepts. Automaton has 36220 states and 57409 transitions. Word has length 194 [2021-11-13 18:19:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:09,380 INFO L470 AbstractCegarLoop]: Abstraction has 36220 states and 57409 transitions. [2021-11-13 18:19:09,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 9 states have internal predecessors, (116), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 18:19:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 36220 states and 57409 transitions. [2021-11-13 18:19:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 18:19:09,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:09,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:09,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:19:09,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:19:09,620 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1653097299, now seen corresponding path program 1 times [2021-11-13 18:19:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:09,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428658482] [2021-11-13 18:19:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:09,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:09,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:19:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:19:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:19:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:19:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:19:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:19:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:19:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:19:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:19:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 18:19:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:19:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-13 18:19:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-11-13 18:19:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:19:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:19:10,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:10,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428658482] [2021-11-13 18:19:10,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428658482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:10,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:10,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 18:19:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541509468] [2021-11-13 18:19:10,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:10,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:19:10,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:19:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:19:10,518 INFO L87 Difference]: Start difference. First operand 36220 states and 57409 transitions. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (26), 10 states have call predecessors, (26), 2 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-13 18:19:12,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:14,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:16,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:19,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:21,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:23,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:18,738 INFO L93 Difference]: Finished difference Result 122187 states and 216484 transitions. [2021-11-13 18:20:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-13 18:20:18,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (26), 10 states have call predecessors, (26), 2 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 205 [2021-11-13 18:20:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:19,320 INFO L225 Difference]: With dead ends: 122187 [2021-11-13 18:20:19,320 INFO L226 Difference]: Without dead ends: 85989 [2021-11-13 18:20:19,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=768, Invalid=3522, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:20:19,510 INFO L933 BasicCegarLoop]: 2217 mSDtfsCounter, 7782 mSDsluCounter, 12881 mSDsCounter, 0 mSdLazyCounter, 15987 mSolverCounterSat, 8217 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52267.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7984 SdHoareTripleChecker+Valid, 15098 SdHoareTripleChecker+Invalid, 24210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 221.64ms SdHoareTripleChecker+Time, 8217 IncrementalHoareTripleChecker+Valid, 15987 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57195.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:19,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7984 Valid, 15098 Invalid, 24210 Unknown, 0 Unchecked, 221.64ms Time], IncrementalHoareTripleChecker [8217 Valid, 15987 Invalid, 6 Unknown, 0 Unchecked, 57195.44ms Time] [2021-11-13 18:20:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85989 states. [2021-11-13 18:20:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85989 to 36260. [2021-11-13 18:20:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36260 states, 26219 states have (on average 1.2990960753651932) internal successors, (34061), 26270 states have internal predecessors, (34061), 7325 states have call successors, (7325), 1293 states have call predecessors, (7325), 2715 states have return successors, (16079), 8816 states have call predecessors, (16079), 7319 states have call successors, (16079) [2021-11-13 18:20:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36260 states to 36260 states and 57465 transitions. [2021-11-13 18:20:24,642 INFO L78 Accepts]: Start accepts. Automaton has 36260 states and 57465 transitions. Word has length 205 [2021-11-13 18:20:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:24,643 INFO L470 AbstractCegarLoop]: Abstraction has 36260 states and 57465 transitions. [2021-11-13 18:20:24,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (26), 10 states have call predecessors, (26), 2 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-13 18:20:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 36260 states and 57465 transitions. [2021-11-13 18:20:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 18:20:24,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:24,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:24,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:20:24,652 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1836115640, now seen corresponding path program 1 times [2021-11-13 18:20:24,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:24,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972669700] [2021-11-13 18:20:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:24,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:24,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:20:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:20:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:20:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:20:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:20:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:20:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:20:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:20:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:20:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:20:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:20:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:20:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-13 18:20:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-13 18:20:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 18:20:25,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:25,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972669700] [2021-11-13 18:20:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972669700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:25,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:25,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-13 18:20:25,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247580512] [2021-11-13 18:20:25,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:25,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:20:25,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:20:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:20:25,484 INFO L87 Difference]: Start difference. First operand 36260 states and 57465 transitions. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (22), 8 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-13 18:20:27,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:29,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:31,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:02,969 INFO L93 Difference]: Finished difference Result 121229 states and 214298 transitions. [2021-11-13 18:21:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:21:02,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (22), 8 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 225 [2021-11-13 18:21:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:03,817 INFO L225 Difference]: With dead ends: 121229 [2021-11-13 18:21:03,817 INFO L226 Difference]: Without dead ends: 84991 [2021-11-13 18:21:03,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:21:03,979 INFO L933 BasicCegarLoop]: 1182 mSDtfsCounter, 6224 mSDsluCounter, 5112 mSDsCounter, 0 mSdLazyCounter, 5599 mSolverCounterSat, 3980 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24648.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6419 SdHoareTripleChecker+Valid, 6294 SdHoareTripleChecker+Invalid, 9582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 88.03ms SdHoareTripleChecker+Time, 3980 IncrementalHoareTripleChecker+Valid, 5599 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26948.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:03,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6419 Valid, 6294 Invalid, 9582 Unknown, 0 Unchecked, 88.03ms Time], IncrementalHoareTripleChecker [3980 Valid, 5599 Invalid, 3 Unknown, 0 Unchecked, 26948.42ms Time] [2021-11-13 18:21:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84991 states. [2021-11-13 18:21:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84991 to 36348. [2021-11-13 18:21:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36348 states, 26271 states have (on average 1.2985040538997374) internal successors, (34113), 26350 states have internal predecessors, (34113), 7325 states have call successors, (7325), 1293 states have call predecessors, (7325), 2751 states have return successors, (16207), 8824 states have call predecessors, (16207), 7319 states have call successors, (16207) [2021-11-13 18:21:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36348 states to 36348 states and 57645 transitions. [2021-11-13 18:21:09,797 INFO L78 Accepts]: Start accepts. Automaton has 36348 states and 57645 transitions. Word has length 225 [2021-11-13 18:21:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:09,798 INFO L470 AbstractCegarLoop]: Abstraction has 36348 states and 57645 transitions. [2021-11-13 18:21:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 4 states have internal predecessors, (142), 2 states have call successors, (22), 8 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-13 18:21:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 36348 states and 57645 transitions. [2021-11-13 18:21:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 18:21:09,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:09,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:09,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:21:09,808 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -824998390, now seen corresponding path program 1 times [2021-11-13 18:21:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:09,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772010424] [2021-11-13 18:21:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:09,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:21:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:21:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 18:21:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 18:21:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-13 18:21:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:21:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:21:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:21:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:21:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-13 18:21:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-13 18:21:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:21:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-13 18:21:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-13 18:21:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 18:21:10,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:10,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772010424] [2021-11-13 18:21:10,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772010424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:10,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227370147] [2021-11-13 18:21:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:10,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:10,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:10,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:10,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b872665-d730-4cfa-a1e5-a1eb89b38114/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:21:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 3996 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:21:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:21:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:21:12,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:21:12,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227370147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:12,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:21:12,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 11 [2021-11-13 18:21:12,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572924013] [2021-11-13 18:21:12,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:12,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:21:12,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:12,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:21:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:12,809 INFO L87 Difference]: Start difference. First operand 36348 states and 57645 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 18:21:14,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:21,056 INFO L93 Difference]: Finished difference Result 48589 states and 76999 transitions. [2021-11-13 18:21:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:21:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 225 [2021-11-13 18:21:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:21,380 INFO L225 Difference]: With dead ends: 48589 [2021-11-13 18:21:21,380 INFO L226 Difference]: Without dead ends: 48572 [2021-11-13 18:21:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:21,400 INFO L933 BasicCegarLoop]: 2008 mSDtfsCounter, 2902 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 278 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3310.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2902 SdHoareTripleChecker+Valid, 2904 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.19ms SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3627.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:21,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2902 Valid, 2904 Invalid, 672 Unknown, 0 Unchecked, 10.19ms Time], IncrementalHoareTripleChecker [278 Valid, 393 Invalid, 1 Unknown, 0 Unchecked, 3627.90ms Time] [2021-11-13 18:21:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48572 states.