./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:45:43,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:45:43,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:45:43,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:45:43,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:45:43,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:45:43,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:45:43,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:45:43,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:45:43,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:45:43,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:45:43,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:45:43,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:45:43,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:45:43,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:45:43,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:45:43,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:45:43,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:45:43,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:45:43,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:45:43,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:45:43,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:45:43,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:45:43,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:45:43,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:45:43,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:45:43,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:45:43,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:45:43,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:45:43,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:45:43,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:45:43,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:45:43,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:45:43,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:45:43,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:45:43,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:45:43,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:45:43,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:45:43,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:45:43,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:45:43,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:45:43,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:45:43,318 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:45:43,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:45:43,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:45:43,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:45:43,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:45:43,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:45:43,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:45:43,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:45:43,321 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:45:43,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:45:43,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:45:43,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:45:43,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:45:43,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:45:43,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:45:43,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:45:43,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:45:43,323 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:45:43,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:45:43,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:45:43,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:45:43,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:45:43,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:45:43,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:45:43,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:45:43,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:45:43,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:45:43,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:45:43,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:45:43,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:45:43,326 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:45:43,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:45:43,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:45:43,327 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_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2022-11-20 11:45:43,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:45:43,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:45:43,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:45:43,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:45:43,636 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:45:43,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-11-20 11:45:46,745 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:45:46,957 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:45:46,957 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-11-20 11:45:46,965 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/data/ec281bf5a/d236379067164526a710c6144f8fb25d/FLAGc3617eecb [2022-11-20 11:45:46,996 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/data/ec281bf5a/d236379067164526a710c6144f8fb25d [2022-11-20 11:45:46,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:45:47,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:45:47,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:45:47,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:45:47,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:45:47,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:46" (1/1) ... [2022-11-20 11:45:47,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231ad69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47, skipping insertion in model container [2022-11-20 11:45:47,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:46" (1/1) ... [2022-11-20 11:45:47,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:45:47,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:45:47,270 WARN L237 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_648859ce-82f3-4bda-868c-694d56dae116/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-11-20 11:45:47,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:45:47,311 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:45:47,331 WARN L237 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_648859ce-82f3-4bda-868c-694d56dae116/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-11-20 11:45:47,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:45:47,374 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:45:47,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47 WrapperNode [2022-11-20 11:45:47,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:45:47,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:45:47,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:45:47,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:45:47,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,412 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-11-20 11:45:47,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:45:47,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:45:47,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:45:47,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:45:47,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:45:47,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:45:47,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:45:47,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:45:47,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (1/1) ... [2022-11-20 11:45:47,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:45:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:47,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:45:47,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:45:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:45:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:45:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:45:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:45:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:45:47,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:45:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:45:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:45:47,661 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:45:47,663 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:45:47,883 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:45:47,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:45:47,889 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 11:45:47,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:47 BoogieIcfgContainer [2022-11-20 11:45:47,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:45:47,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:45:47,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:45:47,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:45:47,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:45:46" (1/3) ... [2022-11-20 11:45:47,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ce8122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:47, skipping insertion in model container [2022-11-20 11:45:47,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:47" (2/3) ... [2022-11-20 11:45:47,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ce8122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:47, skipping insertion in model container [2022-11-20 11:45:47,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:47" (3/3) ... [2022-11-20 11:45:47,915 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2022-11-20 11:45:47,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:45:47,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:45:48,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:45:48,059 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b4ef4d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:45:48,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:45:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:45:48,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:48,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:48,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2022-11-20 11:45:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:48,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719969969] [2022-11-20 11:45:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:48,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719969969] [2022-11-20 11:45:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719969969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:48,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:48,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:45:48,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782216106] [2022-11-20 11:45:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:48,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:48,453 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:48,515 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2022-11-20 11:45:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:45:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:48,527 INFO L225 Difference]: With dead ends: 42 [2022-11-20 11:45:48,527 INFO L226 Difference]: Without dead ends: 20 [2022-11-20 11:45:48,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:48,534 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:48,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-20 11:45:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-20 11:45:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-20 11:45:48,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-11-20 11:45:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:48,572 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-20 11:45:48,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-20 11:45:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:45:48,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:48,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:48,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:45:48,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2022-11-20 11:45:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:48,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024140683] [2022-11-20 11:45:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:48,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024140683] [2022-11-20 11:45:48,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024140683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003341196] [2022-11-20 11:45:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:48,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:48,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:48,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:48,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:45:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:45:48,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:45:48,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:45:48,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003341196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:48,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:45:48,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:45:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33036785] [2022-11-20 11:45:48,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:48,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:48,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:48,793 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:48,832 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-20 11:45:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:45:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:48,838 INFO L225 Difference]: With dead ends: 32 [2022-11-20 11:45:48,838 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 11:45:48,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:48,840 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:48,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 11:45:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 11:45:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-20 11:45:48,846 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-11-20 11:45:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:48,846 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-20 11:45:48,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-20 11:45:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:45:48,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:48,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:48,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:45:49,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:49,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2022-11-20 11:45:49,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476027232] [2022-11-20 11:45:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:49,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:45:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:49,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476027232] [2022-11-20 11:45:49,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476027232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:49,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990212133] [2022-11-20 11:45:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:49,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:49,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:49,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:45:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:45:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:45:49,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:45:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990212133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:49,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:45:49,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:45:49,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563622854] [2022-11-20 11:45:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:49,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:49,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:49,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:49,344 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:49,380 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-11-20 11:45:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:45:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:49,382 INFO L225 Difference]: With dead ends: 44 [2022-11-20 11:45:49,382 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 11:45:49,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:49,384 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:49,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 11:45:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-20 11:45:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-20 11:45:49,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2022-11-20 11:45:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:49,400 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-20 11:45:49,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-20 11:45:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:45:49,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:49,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:49,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 11:45:49,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2022-11-20 11:45:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397675041] [2022-11-20 11:45:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:45:49,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397675041] [2022-11-20 11:45:49,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397675041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:49,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513607829] [2022-11-20 11:45:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:49,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:49,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:49,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:49,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:45:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:45:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:45:49,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:45:49,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513607829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:49,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:49,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 11:45:49,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688477039] [2022-11-20 11:45:49,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:49,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:45:49,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:49,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:45:49,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:45:49,883 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:49,914 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-11-20 11:45:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:45:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:45:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:49,916 INFO L225 Difference]: With dead ends: 49 [2022-11-20 11:45:49,916 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 11:45:49,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:45:49,918 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:49,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 11:45:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 11:45:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-20 11:45:49,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-11-20 11:45:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:49,925 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-20 11:45:49,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-20 11:45:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:45:49,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:49,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:49,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:50,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:50,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1612157157, now seen corresponding path program 2 times [2022-11-20 11:45:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:50,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69695693] [2022-11-20 11:45:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:45:50,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69695693] [2022-11-20 11:45:50,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69695693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533861528] [2022-11-20 11:45:50,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:45:50,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:50,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:50,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:45:50,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:45:50,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:45:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:45:50,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:45:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533861528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:50,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:50,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-20 11:45:50,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308716599] [2022-11-20 11:45:50,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:45:50,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:45:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:45:50,568 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:50,671 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2022-11-20 11:45:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:45:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:45:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:50,673 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:45:50,673 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 11:45:50,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:45:50,676 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:50,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 11:45:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-20 11:45:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-20 11:45:50,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2022-11-20 11:45:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:50,699 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-20 11:45:50,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-20 11:45:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:45:50,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:50,703 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:50,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:50,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1679231593, now seen corresponding path program 3 times [2022-11-20 11:45:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394143758] [2022-11-20 11:45:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-20 11:45:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394143758] [2022-11-20 11:45:51,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394143758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920973180] [2022-11-20 11:45:51,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:45:51,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:51,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:51,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:51,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:45:51,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:45:51,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:45:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-20 11:45:51,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-20 11:45:51,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920973180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:51,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:51,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:45:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742186449] [2022-11-20 11:45:51,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:51,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:45:51,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:45:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:45:51,375 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:51,440 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2022-11-20 11:45:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:45:51,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 11:45:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:51,446 INFO L225 Difference]: With dead ends: 94 [2022-11-20 11:45:51,446 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 11:45:51,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:45:51,449 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:51,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 11:45:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-20 11:45:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-11-20 11:45:51,467 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2022-11-20 11:45:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:51,468 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-11-20 11:45:51,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-11-20 11:45:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 11:45:51,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:51,472 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:51,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:45:51,678 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 4 times [2022-11-20 11:45:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:51,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227859811] [2022-11-20 11:45:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:51,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:45:51,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227859811] [2022-11-20 11:45:51,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227859811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837239741] [2022-11-20 11:45:51,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:45:51,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:51,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:45:52,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:45:52,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:45:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:45:52,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:45:52,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837239741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:52,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:52,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-20 11:45:52,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850672339] [2022-11-20 11:45:52,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:52,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:45:52,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:45:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:45:52,419 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:52,518 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2022-11-20 11:45:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:45:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-20 11:45:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:52,520 INFO L225 Difference]: With dead ends: 143 [2022-11-20 11:45:52,520 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 11:45:52,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:45:52,521 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:52,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 11:45:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-20 11:45:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-11-20 11:45:52,530 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 50 [2022-11-20 11:45:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:52,530 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-11-20 11:45:52,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-11-20 11:45:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 11:45:52,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:52,532 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:52,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 11:45:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:45:52,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388991, now seen corresponding path program 5 times [2022-11-20 11:45:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249837042] [2022-11-20 11:45:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:52,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 11:45:53,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249837042] [2022-11-20 11:45:53,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249837042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218479372] [2022-11-20 11:45:53,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:45:53,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:53,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:53,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:53,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:45:54,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 11:45:54,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:45:54,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-20 11:45:54,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-20 11:45:54,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218479372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:54,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:54,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-11-20 11:45:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946100151] [2022-11-20 11:45:54,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:45:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:45:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:45:54,488 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:54,683 INFO L93 Difference]: Finished difference Result 194 states and 258 transitions. [2022-11-20 11:45:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:45:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-20 11:45:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:54,686 INFO L225 Difference]: With dead ends: 194 [2022-11-20 11:45:54,687 INFO L226 Difference]: Without dead ends: 146 [2022-11-20 11:45:54,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:45:54,689 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:54,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-20 11:45:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-11-20 11:45:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 144 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2022-11-20 11:45:54,716 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 74 [2022-11-20 11:45:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:54,717 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2022-11-20 11:45:54,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2022-11-20 11:45:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 11:45:54,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:54,725 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:54,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:54,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:54,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash -478169085, now seen corresponding path program 6 times [2022-11-20 11:45:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840728624] [2022-11-20 11:45:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-20 11:45:55,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:55,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840728624] [2022-11-20 11:45:55,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840728624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:55,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460270168] [2022-11-20 11:45:55,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:45:55,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:55,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:55,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:55,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:45:55,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:45:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:45:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:56,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:45:56,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-20 11:45:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-20 11:45:56,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:56,909 INFO L321 Elim1Store]: treesize reduction 15, result has 63.4 percent of original size [2022-11-20 11:45:56,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 34 [2022-11-20 11:45:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-20 11:45:56,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460270168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:56,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:56,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 8] total 40 [2022-11-20 11:45:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278017902] [2022-11-20 11:45:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:45:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:45:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:45:56,980 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:58,090 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2022-11-20 11:45:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 11:45:58,091 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-20 11:45:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:58,092 INFO L225 Difference]: With dead ends: 263 [2022-11-20 11:45:58,092 INFO L226 Difference]: Without dead ends: 167 [2022-11-20 11:45:58,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1110, Invalid=4146, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 11:45:58,095 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:58,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 196 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:45:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-20 11:45:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2022-11-20 11:45:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.221476510067114) internal successors, (182), 149 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 182 transitions. [2022-11-20 11:45:58,121 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 182 transitions. Word has length 100 [2022-11-20 11:45:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:58,121 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 182 transitions. [2022-11-20 11:45:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2022-11-20 11:45:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 11:45:58,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:58,124 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:58,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:58,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:58,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1178743045, now seen corresponding path program 1 times [2022-11-20 11:45:58,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:58,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111876492] [2022-11-20 11:45:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:45:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111876492] [2022-11-20 11:45:59,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111876492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998548923] [2022-11-20 11:45:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:59,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:59,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:45:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:59,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:45:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:45:59,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:46:00,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998548923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:00,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:00,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-20 11:46:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630738773] [2022-11-20 11:46:00,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:00,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:46:00,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:46:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:46:00,532 INFO L87 Difference]: Start difference. First operand 150 states and 182 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:00,717 INFO L93 Difference]: Finished difference Result 301 states and 390 transitions. [2022-11-20 11:46:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 11:46:00,718 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-11-20 11:46:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:00,720 INFO L225 Difference]: With dead ends: 301 [2022-11-20 11:46:00,720 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 11:46:00,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:46:00,724 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:00,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 135 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:46:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 11:46:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-11-20 11:46:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.164179104477612) internal successors, (234), 201 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2022-11-20 11:46:00,744 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 106 [2022-11-20 11:46:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:00,744 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2022-11-20 11:46:00,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2022-11-20 11:46:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-20 11:46:00,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:00,752 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:00,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 11:46:00,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:00,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:46:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash -619301457, now seen corresponding path program 2 times [2022-11-20 11:46:00,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:00,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806643277] [2022-11-20 11:46:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:46:03,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806643277] [2022-11-20 11:46:03,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806643277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571739330] [2022-11-20 11:46:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:46:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:03,634 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:03,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:46:03,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:46:03,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 11:46:03,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:46:04,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:46:07,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571739330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:07,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:07,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-11-20 11:46:07,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607531281] [2022-11-20 11:46:07,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:07,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-20 11:46:07,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:07,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-20 11:46:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 11:46:07,815 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:08,269 INFO L93 Difference]: Finished difference Result 405 states and 520 transitions. [2022-11-20 11:46:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-20 11:46:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-20 11:46:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:08,273 INFO L225 Difference]: With dead ends: 405 [2022-11-20 11:46:08,273 INFO L226 Difference]: Without dead ends: 306 [2022-11-20 11:46:08,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 11:46:08,278 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:08,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 154 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:46:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-20 11:46:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-11-20 11:46:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1081967213114754) internal successors, (338), 305 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 338 transitions. [2022-11-20 11:46:08,299 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 338 transitions. Word has length 158 [2022-11-20 11:46:08,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:08,300 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 338 transitions. [2022-11-20 11:46:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 338 transitions. [2022-11-20 11:46:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-20 11:46:08,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:08,305 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:08,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:08,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:08,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:46:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash -535466729, now seen corresponding path program 3 times [2022-11-20 11:46:08,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:08,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922342401] [2022-11-20 11:46:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-11-20 11:46:16,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:16,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922342401] [2022-11-20 11:46:16,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922342401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009932829] [2022-11-20 11:46:16,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:16,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:16,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:16,939 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:16,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:46:17,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 11:46:17,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:17,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:46:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:18,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:46:18,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2022-11-20 11:46:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-11-20 11:46:18,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:19,801 INFO L321 Elim1Store]: treesize reduction 15, result has 75.4 percent of original size [2022-11-20 11:46:19,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2022-11-20 11:46:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-11-20 11:46:20,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009932829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:20,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:20,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 14, 12] total 127 [2022-11-20 11:46:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483200539] [2022-11-20 11:46:20,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:20,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-11-20 11:46:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-11-20 11:46:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5557, Invalid=10445, Unknown=0, NotChecked=0, Total=16002 [2022-11-20 11:46:20,013 INFO L87 Difference]: Start difference. First operand 306 states and 338 transitions. Second operand has 127 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:28,558 INFO L93 Difference]: Finished difference Result 473 states and 558 transitions. [2022-11-20 11:46:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-20 11:46:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2022-11-20 11:46:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:28,561 INFO L225 Difference]: With dead ends: 473 [2022-11-20 11:46:28,561 INFO L226 Difference]: Without dead ends: 374 [2022-11-20 11:46:28,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10491 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=16681, Invalid=45569, Unknown=0, NotChecked=0, Total=62250 [2022-11-20 11:46:28,570 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 312 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:28,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 289 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:46:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-20 11:46:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 312. [2022-11-20 11:46:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1061093247588425) internal successors, (344), 311 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 344 transitions. [2022-11-20 11:46:28,589 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 344 transitions. Word has length 262 [2022-11-20 11:46:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:28,590 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 344 transitions. [2022-11-20 11:46:28,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 344 transitions. [2022-11-20 11:46:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-20 11:46:28,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:28,594 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:28,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:46:28,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:46:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2104195471, now seen corresponding path program 4 times [2022-11-20 11:46:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:28,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94510048] [2022-11-20 11:46:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-11-20 11:46:36,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:36,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94510048] [2022-11-20 11:46:36,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94510048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:36,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647805777] [2022-11-20 11:46:36,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:46:36,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:36,835 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:36,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:46:37,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:46:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-20 11:46:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-11-20 11:46:37,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-11-20 11:46:50,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647805777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:50,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:50,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2022-11-20 11:46:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078526549] [2022-11-20 11:46:50,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2022-11-20 11:46:50,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:50,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2022-11-20 11:46:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2022-11-20 11:46:50,826 INFO L87 Difference]: Start difference. First operand 312 states and 344 transitions. Second operand has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:52,133 INFO L93 Difference]: Finished difference Result 625 states and 793 transitions. [2022-11-20 11:46:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-11-20 11:46:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2022-11-20 11:46:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:52,138 INFO L225 Difference]: With dead ends: 625 [2022-11-20 11:46:52,138 INFO L226 Difference]: Without dead ends: 522 [2022-11-20 11:46:52,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2022-11-20 11:46:52,143 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 312 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:52,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 78 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:46:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-20 11:46:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2022-11-20 11:46:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.0633397312859885) internal successors, (554), 521 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 554 transitions. [2022-11-20 11:46:52,165 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 554 transitions. Word has length 268 [2022-11-20 11:46:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:52,166 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 554 transitions. [2022-11-20 11:46:52,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 554 transitions. [2022-11-20 11:46:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-20 11:46:52,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:52,177 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:52,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:52,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:46:52,384 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:46:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:52,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1936891295, now seen corresponding path program 5 times [2022-11-20 11:46:52,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:52,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056158843] [2022-11-20 11:46:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:52,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 43560 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-11-20 11:47:22,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056158843] [2022-11-20 11:47:22,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056158843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:22,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007507417] [2022-11-20 11:47:22,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:47:22,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:22,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:22,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:22,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_648859ce-82f3-4bda-868c-694d56dae116/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process