./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/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_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/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_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/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 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- 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 10:42:19,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:42:19,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:42:19,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:42:19,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:42:19,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:42:19,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:42:19,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:42:19,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:42:19,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:42:19,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:42:19,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:42:19,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:42:19,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:42:19,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:42:19,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:42:19,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:42:19,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:42:19,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:42:19,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:42:19,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:42:19,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:42:19,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:42:19,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:42:19,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:42:19,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:42:19,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:42:19,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:42:19,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:42:19,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:42:19,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:42:19,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:42:19,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:42:19,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:42:19,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:42:19,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:42:19,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:42:19,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:42:19,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:42:19,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:42:19,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:42:19,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:42:19,263 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:42:19,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:42:19,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:42:19,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:42:19,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:42:19,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:42:19,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:42:19,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:42:19,270 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:42:19,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:42:19,272 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:42:19,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:42:19,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:42:19,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:42:19,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:42:19,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:42:19,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:42:19,274 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:42:19,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:42:19,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:42:19,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:42:19,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:42:19,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:42:19,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:42:19,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:42:19,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:42:19,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:42:19,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:42:19,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:42:19,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:42:19,277 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:42:19,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:42:19,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:42:19,278 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_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2022-11-20 10:42:19,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:42:19,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:42:19,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:42:19,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:42:19,587 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:42:19,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-11-20 10:42:22,602 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:42:22,849 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:42:22,849 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-11-20 10:42:22,855 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/data/3ed6db842/faa9aeff68ba4c0e874276da139c07b7/FLAG54239f48d [2022-11-20 10:42:22,872 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/data/3ed6db842/faa9aeff68ba4c0e874276da139c07b7 [2022-11-20 10:42:22,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:42:22,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:42:22,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:42:22,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:42:22,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:42:22,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:42:22" (1/1) ... [2022-11-20 10:42:22,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b328c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:22, skipping insertion in model container [2022-11-20 10:42:22,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:42:22" (1/1) ... [2022-11-20 10:42:22,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:42:22,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:42:23,044 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_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2022-11-20 10:42:23,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:42:23,074 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:42:23,086 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_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2022-11-20 10:42:23,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:42:23,104 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:42:23,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23 WrapperNode [2022-11-20 10:42:23,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:42:23,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:42:23,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:42:23,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:42:23,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,149 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-11-20 10:42:23,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:42:23,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:42:23,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:42:23,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:42:23,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,172 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:42:23,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:42:23,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:42:23,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:42:23,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (1/1) ... [2022-11-20 10:42:23,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:42:23,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:23,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:42:23,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:42:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:42:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:42:23,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:42:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:42:23,326 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:42:23,328 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:42:23,469 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:42:23,474 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:42:23,475 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 10:42:23,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:42:23 BoogieIcfgContainer [2022-11-20 10:42:23,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:42:23,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:42:23,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:42:23,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:42:23,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:42:22" (1/3) ... [2022-11-20 10:42:23,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393fd221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:42:23, skipping insertion in model container [2022-11-20 10:42:23,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:42:23" (2/3) ... [2022-11-20 10:42:23,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393fd221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:42:23, skipping insertion in model container [2022-11-20 10:42:23,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:42:23" (3/3) ... [2022-11-20 10:42:23,487 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2022-11-20 10:42:23,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:42:23,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:42:23,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:42:23,615 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;@4980f8df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:42:23,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:42:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:42:23,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:23,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:23,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2022-11-20 10:42:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896212574] [2022-11-20 10:42:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:23,818 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 10:42:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:23,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896212574] [2022-11-20 10:42:23,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896212574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:23,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:42:23,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:42:23,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856928360] [2022-11-20 10:42:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:42:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:42:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:42:23,861 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:23,877 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-11-20 10:42:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:42:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:42:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:23,888 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:42:23,888 INFO L226 Difference]: Without dead ends: 12 [2022-11-20 10:42:23,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:42:23,894 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:23,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:42:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-20 10:42:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-20 10:42:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-20 10:42:23,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-11-20 10:42:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:23,930 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-20 10:42:23,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-20 10:42:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:42:23,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:23,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:23,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:42:23,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2022-11-20 10:42:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:23,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012786553] [2022-11-20 10:42:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:24,430 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 10:42:24,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:24,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012786553] [2022-11-20 10:42:24,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012786553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:24,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:42:24,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:42:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981813523] [2022-11-20 10:42:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:24,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:42:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:42:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:42:24,435 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:24,515 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-11-20 10:42:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:42:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:42:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:24,517 INFO L225 Difference]: With dead ends: 22 [2022-11-20 10:42:24,517 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 10:42:24,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:42:24,519 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:24,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 10:42:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-20 10:42:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-20 10:42:24,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2022-11-20 10:42:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:24,525 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-20 10:42:24,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-20 10:42:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:42:24,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:24,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:42:24,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2022-11-20 10:42:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:24,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326587338] [2022-11-20 10:42:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:24,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:24,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:24,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326587338] [2022-11-20 10:42:24,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326587338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:24,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:42:24,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:42:24,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520863656] [2022-11-20 10:42:24,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:24,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:42:24,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:24,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:42:24,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:42:24,590 INFO L87 Difference]: Start difference. First operand 18 states and 26 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 10:42:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:24,611 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-20 10:42:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:42:24,612 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 10:42:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:24,613 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:42:24,613 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 10:42:24,613 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 10:42:24,615 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:24,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:42:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 10:42:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 10:42:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-11-20 10:42:24,624 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 12 [2022-11-20 10:42:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:24,625 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-11-20 10:42:24,625 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 10:42:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-11-20 10:42:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:42:24,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:24,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:24,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:42:24,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2022-11-20 10:42:24,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:24,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130938335] [2022-11-20 10:42:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:24,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:24,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130938335] [2022-11-20 10:42:24,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130938335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:24,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:42:24,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:42:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730135309] [2022-11-20 10:42:24,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:42:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:42:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:42:24,669 INFO L87 Difference]: Start difference. First operand 23 states and 34 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 10:42:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:24,700 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2022-11-20 10:42:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:42:24,701 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 10:42:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:24,702 INFO L225 Difference]: With dead ends: 41 [2022-11-20 10:42:24,702 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 10:42:24,703 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 10:42:24,704 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:24,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:42:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 10:42:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-20 10:42:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-20 10:42:24,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 12 [2022-11-20 10:42:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:24,719 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-20 10:42:24,719 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 10:42:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-20 10:42:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:42:24,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:24,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:42:24,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash -492890182, now seen corresponding path program 1 times [2022-11-20 10:42:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:24,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216976341] [2022-11-20 10:42:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:24,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:24,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216976341] [2022-11-20 10:42:24,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216976341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:42:24,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:42:24,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:42:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084728129] [2022-11-20 10:42:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:42:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:42:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:42:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:42:24,888 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:24,951 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2022-11-20 10:42:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:42:24,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:42:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:24,953 INFO L225 Difference]: With dead ends: 38 [2022-11-20 10:42:24,953 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 10:42:24,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:42:24,955 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:24,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:42:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 10:42:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 10:42:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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 10:42:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2022-11-20 10:42:24,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 12 [2022-11-20 10:42:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:24,962 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2022-11-20 10:42:24,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2022-11-20 10:42:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:42:24,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:24,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:42:24,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1431516133, now seen corresponding path program 1 times [2022-11-20 10:42:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:24,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967468354] [2022-11-20 10:42:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:25,143 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 10:42:25,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:25,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967468354] [2022-11-20 10:42:25,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967468354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:25,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44656138] [2022-11-20 10:42:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:25,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:25,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:25,154 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:25,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:42:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:42:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:25,347 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 10:42:25,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:25,409 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 10:42:25,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44656138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:25,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:25,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 10:42:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911261703] [2022-11-20 10:42:25,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:25,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:42:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:25,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:42:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:42:25,414 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:25,607 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2022-11-20 10:42:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:42:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:42:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:25,610 INFO L225 Difference]: With dead ends: 84 [2022-11-20 10:42:25,610 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 10:42:25,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:42:25,613 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:25,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 10:42:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2022-11-20 10:42:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2022-11-20 10:42:25,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 12 [2022-11-20 10:42:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:25,627 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2022-11-20 10:42:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2022-11-20 10:42:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:42:25,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:25,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:25,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:25,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:25,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1643101482, now seen corresponding path program 1 times [2022-11-20 10:42:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:25,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078449354] [2022-11-20 10:42:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:25,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078449354] [2022-11-20 10:42:25,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078449354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:25,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908900485] [2022-11-20 10:42:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:25,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:25,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:25,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:26,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:42:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:26,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:42:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:26,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:26,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908900485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:26,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:26,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2022-11-20 10:42:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575848904] [2022-11-20 10:42:26,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:42:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:42:26,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:42:26,138 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 10:42:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:26,430 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2022-11-20 10:42:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:42:26,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 14 [2022-11-20 10:42:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:26,434 INFO L225 Difference]: With dead ends: 77 [2022-11-20 10:42:26,434 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 10:42:26,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:42:26,437 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:26,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 10:42:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-11-20 10:42:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 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 10:42:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-11-20 10:42:26,456 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-11-20 10:42:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:26,457 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-11-20 10:42:26,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 10:42:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-11-20 10:42:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:42:26,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:26,458 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:26,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:26,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:26,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash 834986528, now seen corresponding path program 2 times [2022-11-20 10:42:26,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464668235] [2022-11-20 10:42:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:26,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:26,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464668235] [2022-11-20 10:42:26,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464668235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200301744] [2022-11-20 10:42:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:26,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:26,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:26,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:42:26,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:42:26,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:42:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:26,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:27,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200301744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:27,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:27,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-20 10:42:27,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069910787] [2022-11-20 10:42:27,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:27,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:42:27,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:42:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:42:27,114 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 10:42:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:28,191 INFO L93 Difference]: Finished difference Result 223 states and 326 transitions. [2022-11-20 10:42:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 10:42:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 15 [2022-11-20 10:42:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:28,195 INFO L225 Difference]: With dead ends: 223 [2022-11-20 10:42:28,195 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 10:42:28,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:42:28,200 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 305 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:28,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 289 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:42:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 10:42:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 70. [2022-11-20 10:42:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 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 10:42:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2022-11-20 10:42:28,236 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 15 [2022-11-20 10:42:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:28,237 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2022-11-20 10:42:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 10:42:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2022-11-20 10:42:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:42:28,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:28,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:28,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:28,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:42:28,443 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2022-11-20 10:42:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:28,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085093762] [2022-11-20 10:42:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:28,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085093762] [2022-11-20 10:42:28,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085093762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940443959] [2022-11-20 10:42:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:28,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:28,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:28,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:42:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:42:28,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:28,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940443959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:28,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:28,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-20 10:42:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976899084] [2022-11-20 10:42:28,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:28,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:42:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:42:28,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:42:28,788 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 10:42:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:28,878 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2022-11-20 10:42:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:42:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:42:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:28,879 INFO L225 Difference]: With dead ends: 77 [2022-11-20 10:42:28,879 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 10:42:28,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:42:28,882 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:28,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:42:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 10:42:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-20 10:42:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 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 10:42:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-11-20 10:42:28,920 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 16 [2022-11-20 10:42:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:28,920 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-11-20 10:42:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 10:42:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-11-20 10:42:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:42:28,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:28,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:28,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:29,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 10:42:29,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2022-11-20 10:42:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:29,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396993165] [2022-11-20 10:42:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:29,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:42:29,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396993165] [2022-11-20 10:42:29,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396993165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300791523] [2022-11-20 10:42:29,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:29,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:29,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:29,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:42:29,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:42:29,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:29,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:42:29,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:29,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:29,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300791523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:29,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:29,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-11-20 10:42:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062001182] [2022-11-20 10:42:29,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:42:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:42:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:42:29,432 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:29,519 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2022-11-20 10:42:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:42:29,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 10:42:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:29,520 INFO L225 Difference]: With dead ends: 91 [2022-11-20 10:42:29,520 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 10:42:29,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:42:29,522 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:29,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 10:42:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2022-11-20 10:42:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 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 10:42:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2022-11-20 10:42:29,552 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 17 [2022-11-20 10:42:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:29,552 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2022-11-20 10:42:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2022-11-20 10:42:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:42:29,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:29,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:29,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:29,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:29,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 1 times [2022-11-20 10:42:29,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:29,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051160586] [2022-11-20 10:42:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:29,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:42:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051160586] [2022-11-20 10:42:29,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051160586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94521158] [2022-11-20 10:42:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:29,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:29,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:29,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:29,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:42:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:42:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:42:30,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:42:30,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94521158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:30,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:30,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-20 10:42:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634655518] [2022-11-20 10:42:30,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:42:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:42:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:42:30,127 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:30,402 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2022-11-20 10:42:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:42:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 10:42:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:30,404 INFO L225 Difference]: With dead ends: 118 [2022-11-20 10:42:30,404 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 10:42:30,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:42:30,406 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:30,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 116 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 10:42:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2022-11-20 10:42:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 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 10:42:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2022-11-20 10:42:30,437 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 17 [2022-11-20 10:42:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:30,437 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2022-11-20 10:42:30,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2022-11-20 10:42:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:42:30,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:30,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:30,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:30,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:30,646 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash 855427872, now seen corresponding path program 2 times [2022-11-20 10:42:30,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:30,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436958653] [2022-11-20 10:42:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:30,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436958653] [2022-11-20 10:42:30,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436958653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929206135] [2022-11-20 10:42:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:30,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:30,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:30,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:42:30,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:42:30,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:42:30,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:30,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929206135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:30,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:30,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-20 10:42:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265624301] [2022-11-20 10:42:30,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:30,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:42:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:42:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:42:30,924 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:31,540 INFO L93 Difference]: Finished difference Result 129 states and 176 transitions. [2022-11-20 10:42:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:42:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 10:42:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:31,542 INFO L225 Difference]: With dead ends: 129 [2022-11-20 10:42:31,542 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 10:42:31,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:42:31,543 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:31,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 120 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:42:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 10:42:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2022-11-20 10:42:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 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 10:42:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2022-11-20 10:42:31,573 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 17 [2022-11-20 10:42:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:31,573 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2022-11-20 10:42:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2022-11-20 10:42:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:42:31,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:31,574 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:31,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:31,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:42:31,781 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1674725392, now seen corresponding path program 2 times [2022-11-20 10:42:31,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:31,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767962622] [2022-11-20 10:42:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:31,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:31,934 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 10:42:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767962622] [2022-11-20 10:42:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767962622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:31,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465162226] [2022-11-20 10:42:31,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:31,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:31,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:31,936 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:31,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:42:31,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:42:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:42:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:32,113 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 10:42:32,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465162226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:32,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:32,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 4] total 13 [2022-11-20 10:42:32,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213645566] [2022-11-20 10:42:32,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:42:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:42:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:42:32,116 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 10:42:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:32,778 INFO L93 Difference]: Finished difference Result 177 states and 240 transitions. [2022-11-20 10:42:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:42:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) Word has length 19 [2022-11-20 10:42:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:32,779 INFO L225 Difference]: With dead ends: 177 [2022-11-20 10:42:32,779 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 10:42:32,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:42:32,781 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 82 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:32,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 352 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:42:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 10:42:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 90. [2022-11-20 10:42:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 89 states have internal predecessors, (124), 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 10:42:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-11-20 10:42:32,817 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 19 [2022-11-20 10:42:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:32,817 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-11-20 10:42:32,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 10:42:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-11-20 10:42:32,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:42:32,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:32,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:32,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:42:33,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 3 times [2022-11-20 10:42:33,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556443281] [2022-11-20 10:42:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:33,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:42:33,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556443281] [2022-11-20 10:42:33,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556443281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385679955] [2022-11-20 10:42:33,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:42:33,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:33,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:33,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:33,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:42:33,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:42:33,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:33,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:42:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:42:33,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:42:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385679955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:33,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:33,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-20 10:42:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377946754] [2022-11-20 10:42:33,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:42:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:42:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:42:33,345 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:33,472 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2022-11-20 10:42:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:42:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:42:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:33,474 INFO L225 Difference]: With dead ends: 123 [2022-11-20 10:42:33,474 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 10:42:33,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:42:33,475 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:33,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 10:42:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2022-11-20 10:42:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 93 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2022-11-20 10:42:33,517 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 128 transitions. Word has length 20 [2022-11-20 10:42:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:33,517 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 128 transitions. [2022-11-20 10:42:33,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 128 transitions. [2022-11-20 10:42:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:42:33,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:33,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:33,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:42:33,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1617038102, now seen corresponding path program 3 times [2022-11-20 10:42:33,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61919320] [2022-11-20 10:42:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:33,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:33,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:33,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61919320] [2022-11-20 10:42:33,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61919320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850426567] [2022-11-20 10:42:33,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:42:33,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:33,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:33,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:42:34,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:42:34,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:34,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:42:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:42:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:42:34,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850426567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:34,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:34,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-20 10:42:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517699240] [2022-11-20 10:42:34,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:42:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:42:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:42:34,145 INFO L87 Difference]: Start difference. First operand 94 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:36,026 INFO L93 Difference]: Finished difference Result 221 states and 292 transitions. [2022-11-20 10:42:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:42:36,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:42:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:36,028 INFO L225 Difference]: With dead ends: 221 [2022-11-20 10:42:36,028 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 10:42:36,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 10:42:36,030 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:36,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 173 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:42:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 10:42:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 115. [2022-11-20 10:42:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3596491228070176) internal successors, (155), 114 states have internal predecessors, (155), 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 10:42:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2022-11-20 10:42:36,079 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 20 [2022-11-20 10:42:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:36,079 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2022-11-20 10:42:36,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2022-11-20 10:42:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:42:36,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:36,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:36,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:36,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:42:36,285 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1969210240, now seen corresponding path program 4 times [2022-11-20 10:42:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862789524] [2022-11-20 10:42:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:36,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:36,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862789524] [2022-11-20 10:42:36,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862789524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:36,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470087627] [2022-11-20 10:42:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:42:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:36,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:36,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:36,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:42:36,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:42:36,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:36,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:42:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:37,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:37,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470087627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:37,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:37,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-11-20 10:42:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778700240] [2022-11-20 10:42:37,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:37,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:42:37,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:42:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:42:37,151 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 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 10:42:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:37,365 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2022-11-20 10:42:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:42:37,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 10:42:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:37,368 INFO L225 Difference]: With dead ends: 128 [2022-11-20 10:42:37,368 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 10:42:37,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:42:37,369 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:37,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 10:42:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 10:42:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.375) internal successors, (143), 104 states have internal predecessors, (143), 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 10:42:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2022-11-20 10:42:37,423 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 21 [2022-11-20 10:42:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:37,424 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2022-11-20 10:42:37,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 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 10:42:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2022-11-20 10:42:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:42:37,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:37,427 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:37,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:42:37,633 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1698822882, now seen corresponding path program 5 times [2022-11-20 10:42:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:37,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817124112] [2022-11-20 10:42:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:37,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817124112] [2022-11-20 10:42:37,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817124112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:37,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781810979] [2022-11-20 10:42:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:42:37,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:37,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:37,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:42:37,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:42:37,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:42:37,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:38,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:42:38,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781810979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:38,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:38,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-20 10:42:38,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182803176] [2022-11-20 10:42:38,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:38,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:42:38,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:38,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:42:38,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:42:38,252 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:44,731 INFO L93 Difference]: Finished difference Result 436 states and 611 transitions. [2022-11-20 10:42:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 10:42:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 10:42:44,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:44,733 INFO L225 Difference]: With dead ends: 436 [2022-11-20 10:42:44,734 INFO L226 Difference]: Without dead ends: 404 [2022-11-20 10:42:44,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1521, Invalid=4331, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 10:42:44,737 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 674 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:44,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 529 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 10:42:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-20 10:42:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 130. [2022-11-20 10:42:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3953488372093024) internal successors, (180), 129 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 180 transitions. [2022-11-20 10:42:44,797 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 180 transitions. Word has length 21 [2022-11-20 10:42:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:44,797 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 180 transitions. [2022-11-20 10:42:44,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2022-11-20 10:42:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:42:44,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:44,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:44,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:45,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:42:45,004 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1085075168, now seen corresponding path program 3 times [2022-11-20 10:42:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785145461] [2022-11-20 10:42:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:45,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:42:45,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785145461] [2022-11-20 10:42:45,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785145461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750799206] [2022-11-20 10:42:45,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:42:45,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:45,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:45,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:45,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:42:45,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:42:45,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:45,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:42:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:42:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 10:42:45,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750799206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:45,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:45,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2022-11-20 10:42:45,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946604772] [2022-11-20 10:42:45,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:42:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:42:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:42:45,524 INFO L87 Difference]: Start difference. First operand 130 states and 180 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 10:42:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:46,416 INFO L93 Difference]: Finished difference Result 245 states and 319 transitions. [2022-11-20 10:42:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:42:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 10:42:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:46,419 INFO L225 Difference]: With dead ends: 245 [2022-11-20 10:42:46,419 INFO L226 Difference]: Without dead ends: 213 [2022-11-20 10:42:46,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:42:46,422 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 129 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:46,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 304 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:42:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-20 10:42:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 122. [2022-11-20 10:42:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3801652892561984) internal successors, (167), 121 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2022-11-20 10:42:46,503 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 23 [2022-11-20 10:42:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:46,503 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2022-11-20 10:42:46,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 10:42:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2022-11-20 10:42:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:42:46,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:46,504 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:46,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 10:42:46,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:42:46,709 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:46,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1390241056, now seen corresponding path program 4 times [2022-11-20 10:42:46,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:46,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136445545] [2022-11-20 10:42:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:46,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136445545] [2022-11-20 10:42:46,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136445545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522338260] [2022-11-20 10:42:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:42:46,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:46,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:46,967 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:46,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:42:47,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:42:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:42:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:42:47,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:42:47,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522338260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:47,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:47,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-20 10:42:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088348669] [2022-11-20 10:42:47,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:47,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:42:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:42:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:42:47,204 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:51,406 INFO L93 Difference]: Finished difference Result 291 states and 386 transitions. [2022-11-20 10:42:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-20 10:42:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 10:42:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:51,408 INFO L225 Difference]: With dead ends: 291 [2022-11-20 10:42:51,408 INFO L226 Difference]: Without dead ends: 276 [2022-11-20 10:42:51,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=723, Invalid=6417, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 10:42:51,412 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:51,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 256 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 10:42:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-20 10:42:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 134. [2022-11-20 10:42:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.3759398496240602) internal successors, (183), 133 states have internal predecessors, (183), 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 10:42:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 183 transitions. [2022-11-20 10:42:51,498 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 183 transitions. Word has length 23 [2022-11-20 10:42:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:51,498 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 183 transitions. [2022-11-20 10:42:51,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 183 transitions. [2022-11-20 10:42:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:42:51,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:51,499 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:51,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:51,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -699293479, now seen corresponding path program 6 times [2022-11-20 10:42:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:51,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734088085] [2022-11-20 10:42:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:42:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734088085] [2022-11-20 10:42:51,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734088085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173795445] [2022-11-20 10:42:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:42:51,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:51,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:51,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:42:51,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:42:51,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:42:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:42:52,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:42:52,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173795445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:52,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:52,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-11-20 10:42:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985294826] [2022-11-20 10:42:52,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:52,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:42:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:42:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:42:52,130 INFO L87 Difference]: Start difference. First operand 134 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 10:42:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:52,443 INFO L93 Difference]: Finished difference Result 214 states and 289 transitions. [2022-11-20 10:42:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:42:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 24 [2022-11-20 10:42:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:52,450 INFO L225 Difference]: With dead ends: 214 [2022-11-20 10:42:52,451 INFO L226 Difference]: Without dead ends: 203 [2022-11-20 10:42:52,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:42:52,455 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:52,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 111 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:42:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-20 10:42:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2022-11-20 10:42:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.36) internal successors, (204), 150 states have internal predecessors, (204), 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 10:42:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2022-11-20 10:42:52,559 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 24 [2022-11-20 10:42:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:52,560 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2022-11-20 10:42:52,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 10:42:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2022-11-20 10:42:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:42:52,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:52,561 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:52,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:52,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:52,767 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:52,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:52,767 INFO L85 PathProgramCache]: Analyzing trace with hash -149012133, now seen corresponding path program 4 times [2022-11-20 10:42:52,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:52,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614909573] [2022-11-20 10:42:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:52,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:42:52,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:52,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614909573] [2022-11-20 10:42:52,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614909573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:52,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691777794] [2022-11-20 10:42:52,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:42:52,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:52,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:52,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:53,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:42:53,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:42:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:53,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:42:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 10:42:53,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691777794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:53,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:53,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 7] total 21 [2022-11-20 10:42:53,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583549986] [2022-11-20 10:42:53,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:53,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:42:53,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:42:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:42:53,319 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:55,507 INFO L93 Difference]: Finished difference Result 351 states and 471 transitions. [2022-11-20 10:42:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 10:42:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 10:42:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:55,509 INFO L225 Difference]: With dead ends: 351 [2022-11-20 10:42:55,509 INFO L226 Difference]: Without dead ends: 334 [2022-11-20 10:42:55,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 10:42:55,511 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 164 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:55,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 615 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:42:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-20 10:42:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 167. [2022-11-20 10:42:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3614457831325302) internal successors, (226), 166 states have internal predecessors, (226), 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 10:42:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 226 transitions. [2022-11-20 10:42:55,624 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 226 transitions. Word has length 24 [2022-11-20 10:42:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:55,625 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 226 transitions. [2022-11-20 10:42:55,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 226 transitions. [2022-11-20 10:42:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:42:55,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:55,626 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:55,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:55,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 10:42:55,832 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:42:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -311562277, now seen corresponding path program 3 times [2022-11-20 10:42:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:42:55,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785601182] [2022-11-20 10:42:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:42:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:42:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:56,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:42:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785601182] [2022-11-20 10:42:56,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785601182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:42:56,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628901336] [2022-11-20 10:42:56,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:42:56,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:42:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:42:56,167 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:42:56,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:42:56,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 10:42:56,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 10:42:56,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:56,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:56,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628901336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:56,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:42:56,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-20 10:42:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032063426] [2022-11-20 10:42:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:56,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:42:56,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:42:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:42:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:42:56,949 INFO L87 Difference]: Start difference. First operand 167 states and 226 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 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 10:44:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:06,787 INFO L93 Difference]: Finished difference Result 1056 states and 1549 transitions. [2022-11-20 10:44:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 10:44:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 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 24 [2022-11-20 10:44:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:06,794 INFO L225 Difference]: With dead ends: 1056 [2022-11-20 10:44:06,794 INFO L226 Difference]: Without dead ends: 1007 [2022-11-20 10:44:06,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 66.6s TimeCoverageRelationStatistics Valid=2158, Invalid=4814, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 10:44:06,801 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 2168 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:06,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2168 Valid, 1633 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 10:44:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-11-20 10:44:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 228. [2022-11-20 10:44:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3700440528634361) internal successors, (311), 227 states have internal predecessors, (311), 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 10:44:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 311 transitions. [2022-11-20 10:44:06,944 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 311 transitions. Word has length 24 [2022-11-20 10:44:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:06,944 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 311 transitions. [2022-11-20 10:44:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 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 10:44:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 311 transitions. [2022-11-20 10:44:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:44:06,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:06,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:06,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-20 10:44:07,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 10:44:07,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash -825436775, now seen corresponding path program 7 times [2022-11-20 10:44:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734264488] [2022-11-20 10:44:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:44:07,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734264488] [2022-11-20 10:44:07,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734264488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174561171] [2022-11-20 10:44:07,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:44:07,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:07,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:07,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:44:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:44:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:44:07,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:44:08,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174561171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:08,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:08,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 19 [2022-11-20 10:44:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635497332] [2022-11-20 10:44:08,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:08,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:44:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:44:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:44:08,171 INFO L87 Difference]: Start difference. First operand 228 states and 311 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:08,623 INFO L93 Difference]: Finished difference Result 243 states and 326 transitions. [2022-11-20 10:44:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:44:08,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 10:44:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:08,625 INFO L225 Difference]: With dead ends: 243 [2022-11-20 10:44:08,625 INFO L226 Difference]: Without dead ends: 215 [2022-11-20 10:44:08,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:44:08,626 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:08,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 97 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:44:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-20 10:44:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-11-20 10:44:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.3831775700934579) internal successors, (296), 214 states have internal predecessors, (296), 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 10:44:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 296 transitions. [2022-11-20 10:44:08,839 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 296 transitions. Word has length 26 [2022-11-20 10:44:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:08,839 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 296 transitions. [2022-11-20 10:44:08,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 296 transitions. [2022-11-20 10:44:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:44:08,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:08,840 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:08,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:09,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:09,045 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1358585002, now seen corresponding path program 5 times [2022-11-20 10:44:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:09,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646410701] [2022-11-20 10:44:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:09,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646410701] [2022-11-20 10:44:09,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646410701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518904295] [2022-11-20 10:44:09,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:44:09,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:09,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:09,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:09,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:44:09,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:44:09,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:09,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:44:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:09,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:44:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518904295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:09,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:09,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 21 [2022-11-20 10:44:09,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702920126] [2022-11-20 10:44:09,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:44:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:44:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:44:09,731 INFO L87 Difference]: Start difference. First operand 215 states and 296 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 10:44:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:11,763 INFO L93 Difference]: Finished difference Result 506 states and 659 transitions. [2022-11-20 10:44:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 10:44:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 26 [2022-11-20 10:44:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:11,766 INFO L225 Difference]: With dead ends: 506 [2022-11-20 10:44:11,766 INFO L226 Difference]: Without dead ends: 478 [2022-11-20 10:44:11,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=806, Invalid=3354, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 10:44:11,768 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 295 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:11,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 348 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:44:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-20 10:44:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 235. [2022-11-20 10:44:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.393162393162393) internal successors, (326), 234 states have internal predecessors, (326), 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 10:44:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 326 transitions. [2022-11-20 10:44:11,923 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 326 transitions. Word has length 26 [2022-11-20 10:44:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:11,924 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 326 transitions. [2022-11-20 10:44:11,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 10:44:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 326 transitions. [2022-11-20 10:44:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:44:11,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:11,925 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:11,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:12,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:44:12,130 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash -528514310, now seen corresponding path program 6 times [2022-11-20 10:44:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:12,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233048658] [2022-11-20 10:44:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:12,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:44:12,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233048658] [2022-11-20 10:44:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233048658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601161395] [2022-11-20 10:44:12,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:44:12,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:12,408 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:12,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:44:12,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:44:12,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:44:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:44:12,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:44:12,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601161395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:12,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:12,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2022-11-20 10:44:12,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399394980] [2022-11-20 10:44:12,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:12,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:44:12,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:44:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:44:12,719 INFO L87 Difference]: Start difference. First operand 235 states and 326 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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 10:44:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:20,861 INFO L93 Difference]: Finished difference Result 689 states and 835 transitions. [2022-11-20 10:44:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 10:44:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 10:44:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:20,864 INFO L225 Difference]: With dead ends: 689 [2022-11-20 10:44:20,864 INFO L226 Difference]: Without dead ends: 660 [2022-11-20 10:44:20,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=902, Invalid=7654, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 10:44:20,867 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 497 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:20,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 936 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 10:44:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-20 10:44:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 268. [2022-11-20 10:44:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.400749063670412) internal successors, (374), 267 states have internal predecessors, (374), 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 10:44:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 374 transitions. [2022-11-20 10:44:21,030 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 374 transitions. Word has length 28 [2022-11-20 10:44:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:21,030 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 374 transitions. [2022-11-20 10:44:21,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 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 10:44:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 374 transitions. [2022-11-20 10:44:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 10:44:21,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:21,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:21,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:21,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:44:21,237 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash 10818656, now seen corresponding path program 8 times [2022-11-20 10:44:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:21,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976716944] [2022-11-20 10:44:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:21,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 10:44:21,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:21,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976716944] [2022-11-20 10:44:21,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976716944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:21,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991400866] [2022-11-20 10:44:21,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:21,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:21,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:21,484 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:44:21,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:21,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:21,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:44:21,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 10:44:21,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 10:44:21,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991400866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:21,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:21,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-20 10:44:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352823435] [2022-11-20 10:44:21,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:21,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:44:21,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:44:21,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:44:21,732 INFO L87 Difference]: Start difference. First operand 268 states and 374 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 10:44:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:22,502 INFO L93 Difference]: Finished difference Result 398 states and 556 transitions. [2022-11-20 10:44:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:44:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) Word has length 29 [2022-11-20 10:44:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:22,505 INFO L225 Difference]: With dead ends: 398 [2022-11-20 10:44:22,505 INFO L226 Difference]: Without dead ends: 386 [2022-11-20 10:44:22,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:44:22,506 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:22,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 148 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:44:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-20 10:44:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 291. [2022-11-20 10:44:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4241379310344828) internal successors, (413), 290 states have internal predecessors, (413), 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 10:44:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 413 transitions. [2022-11-20 10:44:22,746 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 413 transitions. Word has length 29 [2022-11-20 10:44:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:22,747 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 413 transitions. [2022-11-20 10:44:22,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 10:44:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 413 transitions. [2022-11-20 10:44:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 10:44:22,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:22,748 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:22,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-20 10:44:22,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:22,948 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 753826464, now seen corresponding path program 7 times [2022-11-20 10:44:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:22,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541210149] [2022-11-20 10:44:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:23,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541210149] [2022-11-20 10:44:23,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541210149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549210826] [2022-11-20 10:44:23,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:44:23,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:23,355 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:23,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:44:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:44:23,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:44:23,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:44:23,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549210826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:23,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:23,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-20 10:44:23,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649913054] [2022-11-20 10:44:23,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:44:23,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:44:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:44:23,663 INFO L87 Difference]: Start difference. First operand 291 states and 413 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 10:44:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:42,585 INFO L93 Difference]: Finished difference Result 566 states and 755 transitions. [2022-11-20 10:44:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-20 10:44:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 29 [2022-11-20 10:44:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:42,587 INFO L225 Difference]: With dead ends: 566 [2022-11-20 10:44:42,588 INFO L226 Difference]: Without dead ends: 550 [2022-11-20 10:44:42,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8987 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1875, Invalid=23247, Unknown=0, NotChecked=0, Total=25122 [2022-11-20 10:44:42,593 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 521 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:42,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 370 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 10:44:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-20 10:44:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 302. [2022-11-20 10:44:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.398671096345515) internal successors, (421), 301 states have internal predecessors, (421), 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 10:44:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 421 transitions. [2022-11-20 10:44:42,807 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 421 transitions. Word has length 29 [2022-11-20 10:44:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:42,807 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 421 transitions. [2022-11-20 10:44:42,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 10:44:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 421 transitions. [2022-11-20 10:44:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 10:44:42,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:42,808 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:42,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:43,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:43,009 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:44:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1432259938, now seen corresponding path program 9 times [2022-11-20 10:44:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:43,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620636640] [2022-11-20 10:44:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:44:43,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620636640] [2022-11-20 10:44:43,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620636640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:43,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184301461] [2022-11-20 10:44:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:44:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:43,403 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:43,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:44:43,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 10:44:43,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:43,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 10:44:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:44,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184301461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:44,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:44,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-20 10:44:44,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923955116] [2022-11-20 10:44:44,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:44,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 10:44:44,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 10:44:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:44:44,430 INFO L87 Difference]: Start difference. First operand 302 states and 421 transitions. Second operand has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 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 10:45:05,776 WARN L233 SmtUtils]: Spent 11.32s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:17,640 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:34,163 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:46,033 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:48,162 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296))) is different from false [2022-11-20 10:46:00,660 WARN L233 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:46:18,190 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:46:39,015 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:47:06,241 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:47:21,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:48:44,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:49:38,794 WARN L233 SmtUtils]: Spent 7.20s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:49:41,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:49:42,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:49:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:45,034 INFO L93 Difference]: Finished difference Result 1468 states and 2167 transitions. [2022-11-20 10:49:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-11-20 10:49:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 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 29 [2022-11-20 10:49:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:45,038 INFO L225 Difference]: With dead ends: 1468 [2022-11-20 10:49:45,038 INFO L226 Difference]: Without dead ends: 1414 [2022-11-20 10:49:45,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9988 ImplicationChecksByTransitivity, 282.7s TimeCoverageRelationStatistics Valid=7139, Invalid=19593, Unknown=4, NotChecked=324, Total=27060 [2022-11-20 10:49:45,042 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 2298 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 676 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:45,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 1978 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 1475 Invalid, 2 Unknown, 2 Unchecked, 16.8s Time] [2022-11-20 10:49:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-11-20 10:49:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 354. [2022-11-20 10:49:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.4079320113314449) internal successors, (497), 353 states have internal predecessors, (497), 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 10:49:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 497 transitions. [2022-11-20 10:49:45,400 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 497 transitions. Word has length 29 [2022-11-20 10:49:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:45,401 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 497 transitions. [2022-11-20 10:49:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 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 10:49:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 497 transitions. [2022-11-20 10:49:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:49:45,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:45,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:45,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:45,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 10:49:45,608 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 10 times [2022-11-20 10:49:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:45,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911180369] [2022-11-20 10:49:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:49:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911180369] [2022-11-20 10:49:46,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911180369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:46,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515001728] [2022-11-20 10:49:46,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:49:46,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:46,422 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:46,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:49:46,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:49:46,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 10:49:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:49:46,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:49:46,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515001728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:46,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:46,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 23 [2022-11-20 10:49:46,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455309456] [2022-11-20 10:49:46,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:46,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:49:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:49:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:49:46,918 INFO L87 Difference]: Start difference. First operand 354 states and 497 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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 10:49:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:47,627 INFO L93 Difference]: Finished difference Result 371 states and 514 transitions. [2022-11-20 10:49:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:49:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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 31 [2022-11-20 10:49:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:47,629 INFO L225 Difference]: With dead ends: 371 [2022-11-20 10:49:47,629 INFO L226 Difference]: Without dead ends: 338 [2022-11-20 10:49:47,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:49:47,630 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:47,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 89 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:49:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-20 10:49:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2022-11-20 10:49:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.4213649851632046) internal successors, (479), 337 states have internal predecessors, (479), 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 10:49:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 479 transitions. [2022-11-20 10:49:47,908 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 479 transitions. Word has length 31 [2022-11-20 10:49:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:47,909 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 479 transitions. [2022-11-20 10:49:47,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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 10:49:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 479 transitions. [2022-11-20 10:49:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:49:47,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:47,910 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:47,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-20 10:49:48,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 10:49:48,110 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1844043248, now seen corresponding path program 11 times [2022-11-20 10:49:48,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:48,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629877729] [2022-11-20 10:49:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:49:48,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629877729] [2022-11-20 10:49:48,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629877729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144420430] [2022-11-20 10:49:48,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:49:48,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:48,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:48,542 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:48,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 10:49:49,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 10:49:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 10:49:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:49:49,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-20 10:49:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144420430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:49,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:49,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 4] total 23 [2022-11-20 10:49:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819840270] [2022-11-20 10:49:49,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:49,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:49:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:49:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:49:49,416 INFO L87 Difference]: Start difference. First operand 338 states and 479 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:49:51,887 INFO L93 Difference]: Finished difference Result 721 states and 976 transitions. [2022-11-20 10:49:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 10:49:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 10:49:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:49:51,890 INFO L225 Difference]: With dead ends: 721 [2022-11-20 10:49:51,890 INFO L226 Difference]: Without dead ends: 689 [2022-11-20 10:49:51,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:49:51,892 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 167 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:49:51,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2280 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:49:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-11-20 10:49:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 341. [2022-11-20 10:49:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4176470588235295) internal successors, (482), 340 states have internal predecessors, (482), 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 10:49:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2022-11-20 10:49:52,231 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 31 [2022-11-20 10:49:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:49:52,231 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2022-11-20 10:49:52,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:49:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2022-11-20 10:49:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:49:52,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:49:52,232 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:49:52,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:49:52,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:52,433 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:49:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:49:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1247012492, now seen corresponding path program 5 times [2022-11-20 10:49:52,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:49:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130130843] [2022-11-20 10:49:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:49:52,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:49:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:49:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 10:49:52,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130130843] [2022-11-20 10:49:52,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130130843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:49:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993051712] [2022-11-20 10:49:52,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:49:52,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:49:52,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:49:52,784 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:49:52,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 10:49:53,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 10:49:53,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:49:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 10:49:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:49:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 10:49:53,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 10:49:54,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993051712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:54,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:49:54,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2022-11-20 10:49:54,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221868705] [2022-11-20 10:49:54,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:54,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:49:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:49:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:49:54,087 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 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 10:50:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:08,394 INFO L93 Difference]: Finished difference Result 695 states and 895 transitions. [2022-11-20 10:50:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-20 10:50:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 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 32 [2022-11-20 10:50:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:08,397 INFO L225 Difference]: With dead ends: 695 [2022-11-20 10:50:08,398 INFO L226 Difference]: Without dead ends: 578 [2022-11-20 10:50:08,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=795, Invalid=8135, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 10:50:08,399 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 473 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:08,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 971 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 10:50:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-20 10:50:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 323. [2022-11-20 10:50:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.375776397515528) internal successors, (443), 322 states have internal predecessors, (443), 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 10:50:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 443 transitions. [2022-11-20 10:50:08,669 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 443 transitions. Word has length 32 [2022-11-20 10:50:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:08,669 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 443 transitions. [2022-11-20 10:50:08,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 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 10:50:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 443 transitions. [2022-11-20 10:50:08,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:50:08,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:08,671 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:08,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-20 10:50:08,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-20 10:50:08,881 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -647695254, now seen corresponding path program 8 times [2022-11-20 10:50:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034501146] [2022-11-20 10:50:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:50:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:50:09,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:50:09,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034501146] [2022-11-20 10:50:09,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034501146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:50:09,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713162053] [2022-11-20 10:50:09,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:50:09,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:09,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:09,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:50:09,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 10:50:09,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:50:09,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:50:09,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:50:09,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:50:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:50:09,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:50:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:50:09,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713162053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:50:09,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:50:09,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2022-11-20 10:50:09,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774597977] [2022-11-20 10:50:09,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:50:09,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:50:09,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:50:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:50:09,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:50:09,751 INFO L87 Difference]: Start difference. First operand 323 states and 443 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 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 10:50:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:59,419 INFO L93 Difference]: Finished difference Result 749 states and 991 transitions. [2022-11-20 10:50:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-11-20 10:50:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 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 32 [2022-11-20 10:50:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:59,422 INFO L225 Difference]: With dead ends: 749 [2022-11-20 10:50:59,423 INFO L226 Difference]: Without dead ends: 725 [2022-11-20 10:50:59,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19796 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=3172, Invalid=48130, Unknown=0, NotChecked=0, Total=51302 [2022-11-20 10:50:59,426 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 784 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 3675 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 4298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:59,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 561 Invalid, 4298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3675 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-20 10:50:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-20 10:50:59,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 364. [2022-11-20 10:50:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.3829201101928374) internal successors, (502), 363 states have internal predecessors, (502), 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 10:50:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 502 transitions. [2022-11-20 10:50:59,766 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 502 transitions. Word has length 32 [2022-11-20 10:50:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:59,767 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 502 transitions. [2022-11-20 10:50:59,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 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 10:50:59,767 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 502 transitions. [2022-11-20 10:50:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 10:50:59,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:50:59,768 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:50:59,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-20 10:50:59,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:59,975 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:50:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:50:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash 59915840, now seen corresponding path program 6 times [2022-11-20 10:50:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:50:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284164273] [2022-11-20 10:50:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:50:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:50:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:51:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284164273] [2022-11-20 10:51:00,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284164273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963196152] [2022-11-20 10:51:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:00,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:00,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 10:51:00,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 10:51:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 10:51:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:51:00,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 10:51:00,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963196152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:00,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:00,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 27 [2022-11-20 10:51:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97513142] [2022-11-20 10:51:00,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:51:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:51:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:51:00,830 INFO L87 Difference]: Start difference. First operand 364 states and 502 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 10:51:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:05,166 INFO L93 Difference]: Finished difference Result 694 states and 889 transitions. [2022-11-20 10:51:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 10:51:05,166 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 10:51:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:05,170 INFO L225 Difference]: With dead ends: 694 [2022-11-20 10:51:05,170 INFO L226 Difference]: Without dead ends: 612 [2022-11-20 10:51:05,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=493, Invalid=4063, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:51:05,171 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 209 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:05,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 885 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:51:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-20 10:51:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 368. [2022-11-20 10:51:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.3514986376021798) internal successors, (496), 367 states have internal predecessors, (496), 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 10:51:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 496 transitions. [2022-11-20 10:51:05,588 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 496 transitions. Word has length 33 [2022-11-20 10:51:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:05,589 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 496 transitions. [2022-11-20 10:51:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 10:51:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 496 transitions. [2022-11-20 10:51:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 10:51:05,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:05,590 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:05,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:05,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:05,795 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:05,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1552700359, now seen corresponding path program 12 times [2022-11-20 10:51:05,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:05,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380613436] [2022-11-20 10:51:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:05,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 10:51:06,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380613436] [2022-11-20 10:51:06,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380613436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612325333] [2022-11-20 10:51:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:06,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:06,022 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:06,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 10:51:06,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:51:06,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:06,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:51:06,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 10:51:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 10:51:06,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612325333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:06,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-20 10:51:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420137474] [2022-11-20 10:51:06,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:06,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:51:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:51:06,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:51:06,317 INFO L87 Difference]: Start difference. First operand 368 states and 496 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 10:51:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:08,163 INFO L93 Difference]: Finished difference Result 698 states and 977 transitions. [2022-11-20 10:51:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:51:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 34 [2022-11-20 10:51:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:08,166 INFO L225 Difference]: With dead ends: 698 [2022-11-20 10:51:08,167 INFO L226 Difference]: Without dead ends: 679 [2022-11-20 10:51:08,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:51:08,167 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 257 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:08,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 255 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:51:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-11-20 10:51:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 530. [2022-11-20 10:51:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.4120982986767485) internal successors, (747), 529 states have internal predecessors, (747), 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 10:51:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 747 transitions. [2022-11-20 10:51:08,690 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 747 transitions. Word has length 34 [2022-11-20 10:51:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:08,690 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 747 transitions. [2022-11-20 10:51:08,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 10:51:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 747 transitions. [2022-11-20 10:51:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 10:51:08,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:08,692 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:08,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:08,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:08,897 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:08,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1229894537, now seen corresponding path program 13 times [2022-11-20 10:51:08,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:08,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759379664] [2022-11-20 10:51:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:08,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:51:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759379664] [2022-11-20 10:51:09,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759379664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839542784] [2022-11-20 10:51:09,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:09,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:09,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:09,340 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:09,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 10:51:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 10:51:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:51:09,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-11-20 10:51:09,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839542784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:09,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:09,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 8] total 32 [2022-11-20 10:51:09,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409647775] [2022-11-20 10:51:09,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:51:09,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:51:09,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:51:09,879 INFO L87 Difference]: Start difference. First operand 530 states and 747 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:17,414 INFO L93 Difference]: Finished difference Result 1218 states and 1645 transitions. [2022-11-20 10:51:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-20 10:51:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 10:51:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:17,417 INFO L225 Difference]: With dead ends: 1218 [2022-11-20 10:51:17,417 INFO L226 Difference]: Without dead ends: 1148 [2022-11-20 10:51:17,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4522 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1032, Invalid=13974, Unknown=0, NotChecked=0, Total=15006 [2022-11-20 10:51:17,419 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 258 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:17,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1884 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 10:51:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-11-20 10:51:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 566. [2022-11-20 10:51:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.407079646017699) internal successors, (795), 565 states have internal predecessors, (795), 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 10:51:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 795 transitions. [2022-11-20 10:51:18,059 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 795 transitions. Word has length 34 [2022-11-20 10:51:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:18,059 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 795 transitions. [2022-11-20 10:51:18,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 795 transitions. [2022-11-20 10:51:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:51:18,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:18,061 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:18,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:18,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:18,261 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash -633630471, now seen corresponding path program 14 times [2022-11-20 10:51:18,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112652090] [2022-11-20 10:51:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:18,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:51:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:19,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112652090] [2022-11-20 10:51:19,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112652090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:19,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589048819] [2022-11-20 10:51:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:19,264 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:19,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 10:51:19,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:19,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 10:51:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:51:19,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:51:19,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589048819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:19,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:19,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 27 [2022-11-20 10:51:19,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187485646] [2022-11-20 10:51:19,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:19,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:51:19,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:19,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:51:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:51:19,853 INFO L87 Difference]: Start difference. First operand 566 states and 795 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 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 10:51:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:21,061 INFO L93 Difference]: Finished difference Result 576 states and 804 transitions. [2022-11-20 10:51:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:51:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 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 36 [2022-11-20 10:51:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:21,063 INFO L225 Difference]: With dead ends: 576 [2022-11-20 10:51:21,063 INFO L226 Difference]: Without dead ends: 547 [2022-11-20 10:51:21,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:51:21,064 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:21,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 121 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:51:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-20 10:51:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-11-20 10:51:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.4194139194139195) internal successors, (775), 546 states have internal predecessors, (775), 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 10:51:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 775 transitions. [2022-11-20 10:51:21,819 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 775 transitions. Word has length 36 [2022-11-20 10:51:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:21,819 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 775 transitions. [2022-11-20 10:51:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 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 10:51:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 775 transitions. [2022-11-20 10:51:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:51:21,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:21,821 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:21,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:22,035 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:22,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1927964742, now seen corresponding path program 9 times [2022-11-20 10:51:22,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:22,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87276046] [2022-11-20 10:51:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 10:51:22,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:22,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87276046] [2022-11-20 10:51:22,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87276046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:22,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051740805] [2022-11-20 10:51:22,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:22,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:22,426 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:22,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 10:51:22,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 10:51:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 10:51:22,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 10:51:23,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051740805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:23,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:23,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 38 [2022-11-20 10:51:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331852241] [2022-11-20 10:51:23,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:23,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 10:51:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 10:51:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:51:23,204 INFO L87 Difference]: Start difference. First operand 547 states and 775 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 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 10:51:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:35,128 INFO L93 Difference]: Finished difference Result 1738 states and 2257 transitions. [2022-11-20 10:51:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-20 10:51:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 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 36 [2022-11-20 10:51:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:35,135 INFO L225 Difference]: With dead ends: 1738 [2022-11-20 10:51:35,135 INFO L226 Difference]: Without dead ends: 1683 [2022-11-20 10:51:35,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3224 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2464, Invalid=10876, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 10:51:35,137 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 441 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 3034 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 3034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:35,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1067 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 3034 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 10:51:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-11-20 10:51:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 740. [2022-11-20 10:51:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.4871447902571042) internal successors, (1099), 739 states have internal predecessors, (1099), 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 10:51:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1099 transitions. [2022-11-20 10:51:36,350 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1099 transitions. Word has length 36 [2022-11-20 10:51:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:36,350 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1099 transitions. [2022-11-20 10:51:36,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 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 10:51:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1099 transitions. [2022-11-20 10:51:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 10:51:36,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:36,352 INFO L195 NwaCegarLoop]: trace histogram [17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:36,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:36,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 10:51:36,553 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1943611099, now seen corresponding path program 15 times [2022-11-20 10:51:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:36,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440814681] [2022-11-20 10:51:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:51:37,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440814681] [2022-11-20 10:51:37,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440814681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603838216] [2022-11-20 10:51:37,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:37,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:37,040 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:37,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d51ac98f-636c-4eb0-bce0-85cf0ff94ea7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 10:51:37,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-20 10:51:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 10:51:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:51:37,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:51:38,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603838216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:38,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:38,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-20 10:51:38,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397740452] [2022-11-20 10:51:38,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:38,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 10:51:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 10:51:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 10:51:38,761 INFO L87 Difference]: Start difference. First operand 740 states and 1099 transitions. Second operand has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 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 10:52:14,225 WARN L233 SmtUtils]: Spent 19.57s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:52:48,319 WARN L233 SmtUtils]: Spent 19.00s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:53:25,734 WARN L233 SmtUtils]: Spent 25.76s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:53:39,926 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:54:15,384 WARN L233 SmtUtils]: Spent 21.24s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:54:50,787 WARN L233 SmtUtils]: Spent 23.79s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:55:05,544 WARN L233 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:55:38,502 WARN L233 SmtUtils]: Spent 15.75s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:08,666 WARN L233 SmtUtils]: Spent 21.48s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:42,535 WARN L233 SmtUtils]: Spent 18.78s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:51,388 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)