./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8 --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 c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a --- 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-2329fc7 [2022-12-13 11:39:12,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:39:12,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:39:12,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:39:12,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:39:12,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:39:12,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:39:12,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:39:12,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:39:12,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:39:12,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:39:12,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:39:12,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:39:12,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:39:12,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:39:12,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:39:12,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:39:12,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:39:12,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:39:12,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:39:12,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:39:12,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:39:12,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:39:12,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:39:12,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:39:12,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:39:12,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:39:12,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:39:12,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:39:12,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:39:12,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:39:12,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:39:12,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:39:12,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:39:12,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:39:12,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:39:12,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:39:12,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:39:12,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:39:12,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:39:12,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:39:12,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:39:12,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:39:12,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:39:12,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:39:12,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:39:12,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:39:12,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:39:12,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:39:12,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:39:12,328 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:39:12,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:39:12,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:39:12,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:39:12,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:39:12,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:39:12,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:39:12,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:39:12,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:39:12,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:39:12,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:39:12,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:39:12,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:39:12,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:39:12,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:39:12,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:39:12,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:39:12,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:39:12,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:39:12,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:39:12,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:39:12,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:39:12,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:39:12,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:39:12,332 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:39:12,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:39:12,333 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:39:12,333 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a [2022-12-13 11:39:12,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:39:12,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:39:12,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:39:12,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:39:12,544 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:39:12,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-12-13 11:39:15,112 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:39:15,402 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:39:15,402 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-12-13 11:39:15,423 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/data/7dfe72978/4d9e1c15c3324df9974a7d027f4098f0/FLAGfd0cb17ce [2022-12-13 11:39:15,680 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/data/7dfe72978/4d9e1c15c3324df9974a7d027f4098f0 [2022-12-13 11:39:15,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:39:15,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:39:15,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:39:15,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:39:15,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:39:15,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:39:15" (1/1) ... [2022-12-13 11:39:15,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4e48b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:15, skipping insertion in model container [2022-12-13 11:39:15,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:39:15" (1/1) ... [2022-12-13 11:39:15,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:39:15,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:39:16,120 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_46b13ed8-0a64-41c2-9cec-4085b0934f58/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-12-13 11:39:16,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:39:16,143 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:39:16,361 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_46b13ed8-0a64-41c2-9cec-4085b0934f58/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-12-13 11:39:16,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:39:16,379 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:39:16,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16 WrapperNode [2022-12-13 11:39:16,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:39:16,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:39:16,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:39:16,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:39:16,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,484 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-13 11:39:16,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:39:16,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:39:16,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:39:16,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:39:16,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:39:16,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:39:16,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:39:16,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:39:16,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (1/1) ... [2022-12-13 11:39:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:39:16,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:16,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:39:16,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:39:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:39:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:39:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:39:16,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:39:16,711 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:39:16,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:39:18,013 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:39:18,019 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:39:18,019 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 11:39:18,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:39:18 BoogieIcfgContainer [2022-12-13 11:39:18,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:39:18,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:39:18,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:39:18,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:39:18,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:39:15" (1/3) ... [2022-12-13 11:39:18,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d0b9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:39:18, skipping insertion in model container [2022-12-13 11:39:18,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:39:16" (2/3) ... [2022-12-13 11:39:18,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d0b9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:39:18, skipping insertion in model container [2022-12-13 11:39:18,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:39:18" (3/3) ... [2022-12-13 11:39:18,028 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2022-12-13 11:39:18,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:39:18,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:39:18,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:39:18,093 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;@14b92457, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:39:18,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:39:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-12-13 11:39:18,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:18,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:18,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash -910941086, now seen corresponding path program 1 times [2022-12-13 11:39:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:18,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370677507] [2022-12-13 11:39:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:18,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370677507] [2022-12-13 11:39:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370677507] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:18,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:18,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845081083] [2022-12-13 11:39:18,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:18,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:18,916 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:19,839 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-12-13 11:39:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2022-12-13 11:39:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:19,850 INFO L225 Difference]: With dead ends: 824 [2022-12-13 11:39:19,850 INFO L226 Difference]: Without dead ends: 445 [2022-12-13 11:39:19,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:19,855 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:19,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 245 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 11:39:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-12-13 11:39:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-12-13 11:39:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4221218961625282) internal successors, (630), 443 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 630 transitions. [2022-12-13 11:39:19,894 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 630 transitions. Word has length 200 [2022-12-13 11:39:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:19,895 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 630 transitions. [2022-12-13 11:39:19,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:19,895 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 630 transitions. [2022-12-13 11:39:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-13 11:39:19,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:19,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:19,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:39:19,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1872130817, now seen corresponding path program 1 times [2022-12-13 11:39:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:19,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450752659] [2022-12-13 11:39:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450752659] [2022-12-13 11:39:20,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450752659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:20,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:20,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826518472] [2022-12-13 11:39:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:20,055 INFO L87 Difference]: Start difference. First operand 444 states and 630 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:20,776 INFO L93 Difference]: Finished difference Result 1312 states and 1869 transitions. [2022-12-13 11:39:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:20,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-12-13 11:39:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:20,781 INFO L225 Difference]: With dead ends: 1312 [2022-12-13 11:39:20,781 INFO L226 Difference]: Without dead ends: 870 [2022-12-13 11:39:20,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:20,783 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:20,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:39:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-12-13 11:39:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2022-12-13 11:39:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3883040935672515) internal successors, (1187), 855 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1187 transitions. [2022-12-13 11:39:20,810 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1187 transitions. Word has length 208 [2022-12-13 11:39:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:20,810 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1187 transitions. [2022-12-13 11:39:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1187 transitions. [2022-12-13 11:39:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-13 11:39:20,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:20,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:39:20,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1580219308, now seen corresponding path program 1 times [2022-12-13 11:39:20,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:20,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910270213] [2022-12-13 11:39:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:20,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:39:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910270213] [2022-12-13 11:39:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910270213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:21,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905138871] [2022-12-13 11:39:21,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:21,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:21,276 INFO L87 Difference]: Start difference. First operand 856 states and 1187 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:22,060 INFO L93 Difference]: Finished difference Result 1863 states and 2639 transitions. [2022-12-13 11:39:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:39:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 215 [2022-12-13 11:39:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:22,063 INFO L225 Difference]: With dead ends: 1863 [2022-12-13 11:39:22,063 INFO L226 Difference]: Without dead ends: 835 [2022-12-13 11:39:22,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:22,066 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 299 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:22,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 47 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:39:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-12-13 11:39:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2022-12-13 11:39:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.2613908872901678) internal successors, (1052), 834 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1052 transitions. [2022-12-13 11:39:22,087 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1052 transitions. Word has length 215 [2022-12-13 11:39:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:22,088 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1052 transitions. [2022-12-13 11:39:22,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1052 transitions. [2022-12-13 11:39:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-12-13 11:39:22,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:22,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:22,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:39:22,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:22,093 INFO L85 PathProgramCache]: Analyzing trace with hash -762822200, now seen corresponding path program 1 times [2022-12-13 11:39:22,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:22,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182911208] [2022-12-13 11:39:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:22,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182911208] [2022-12-13 11:39:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182911208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:22,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:22,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204915975] [2022-12-13 11:39:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:22,430 INFO L87 Difference]: Start difference. First operand 835 states and 1052 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:23,052 INFO L93 Difference]: Finished difference Result 2086 states and 2701 transitions. [2022-12-13 11:39:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2022-12-13 11:39:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:23,058 INFO L225 Difference]: With dead ends: 2086 [2022-12-13 11:39:23,058 INFO L226 Difference]: Without dead ends: 1659 [2022-12-13 11:39:23,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:23,060 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:23,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:39:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-12-13 11:39:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1653. [2022-12-13 11:39:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 1.2433414043583535) internal successors, (2054), 1652 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2054 transitions. [2022-12-13 11:39:23,094 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2054 transitions. Word has length 228 [2022-12-13 11:39:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:23,094 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 2054 transitions. [2022-12-13 11:39:23,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2054 transitions. [2022-12-13 11:39:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-12-13 11:39:23,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:23,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:39:23,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 966647857, now seen corresponding path program 1 times [2022-12-13 11:39:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:23,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501010731] [2022-12-13 11:39:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501010731] [2022-12-13 11:39:23,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501010731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:23,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:23,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144042150] [2022-12-13 11:39:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:23,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:23,514 INFO L87 Difference]: Start difference. First operand 1653 states and 2054 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:24,507 INFO L93 Difference]: Finished difference Result 3487 states and 4479 transitions. [2022-12-13 11:39:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:39:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 231 [2022-12-13 11:39:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:24,512 INFO L225 Difference]: With dead ends: 3487 [2022-12-13 11:39:24,512 INFO L226 Difference]: Without dead ends: 2474 [2022-12-13 11:39:24,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:24,514 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 194 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:24,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 141 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:39:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-12-13 11:39:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2473. [2022-12-13 11:39:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 1.2317961165048543) internal successors, (3045), 2472 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3045 transitions. [2022-12-13 11:39:24,545 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3045 transitions. Word has length 231 [2022-12-13 11:39:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:24,546 INFO L495 AbstractCegarLoop]: Abstraction has 2473 states and 3045 transitions. [2022-12-13 11:39:24,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3045 transitions. [2022-12-13 11:39:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-12-13 11:39:24,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:24,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:24,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:39:24,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2072872742, now seen corresponding path program 1 times [2022-12-13 11:39:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526482456] [2022-12-13 11:39:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:24,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:24,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526482456] [2022-12-13 11:39:24,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526482456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975655993] [2022-12-13 11:39:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:24,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:24,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:24,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:24,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:39:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:39:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 11:39:25,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:25,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975655993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:25,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:39:25,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 11:39:25,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038969802] [2022-12-13 11:39:25,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:25,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:25,242 INFO L87 Difference]: Start difference. First operand 2473 states and 3045 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:25,775 INFO L93 Difference]: Finished difference Result 4749 states and 5885 transitions. [2022-12-13 11:39:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 238 [2022-12-13 11:39:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:25,780 INFO L225 Difference]: With dead ends: 4749 [2022-12-13 11:39:25,780 INFO L226 Difference]: Without dead ends: 2278 [2022-12-13 11:39:25,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:25,782 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:25,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 289 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:39:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2022-12-13 11:39:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2270. [2022-12-13 11:39:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.2269722344645217) internal successors, (2784), 2269 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 2784 transitions. [2022-12-13 11:39:25,808 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 2784 transitions. Word has length 238 [2022-12-13 11:39:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:25,808 INFO L495 AbstractCegarLoop]: Abstraction has 2270 states and 2784 transitions. [2022-12-13 11:39:25,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 2784 transitions. [2022-12-13 11:39:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-12-13 11:39:25,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:25,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:25,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:26,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:26,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -398536270, now seen corresponding path program 1 times [2022-12-13 11:39:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:26,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826662309] [2022-12-13 11:39:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:26,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:39:26,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:26,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826662309] [2022-12-13 11:39:26,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826662309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:26,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420942344] [2022-12-13 11:39:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:26,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:26,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:39:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:26,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:39:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:39:26,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:26,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420942344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:26,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:39:26,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 11:39:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82275992] [2022-12-13 11:39:26,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:26,499 INFO L87 Difference]: Start difference. First operand 2270 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:27,034 INFO L93 Difference]: Finished difference Result 4744 states and 6133 transitions. [2022-12-13 11:39:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 244 [2022-12-13 11:39:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:27,039 INFO L225 Difference]: With dead ends: 4744 [2022-12-13 11:39:27,039 INFO L226 Difference]: Without dead ends: 3491 [2022-12-13 11:39:27,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:27,041 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 215 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:27,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 335 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:39:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-12-13 11:39:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3488. [2022-12-13 11:39:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3487 states have (on average 1.1783768282190996) internal successors, (4109), 3487 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4109 transitions. [2022-12-13 11:39:27,083 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4109 transitions. Word has length 244 [2022-12-13 11:39:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:27,083 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 4109 transitions. [2022-12-13 11:39:27,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4109 transitions. [2022-12-13 11:39:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-13 11:39:27,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:27,089 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:27,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:39:27,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 11:39:27,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2057533952, now seen corresponding path program 1 times [2022-12-13 11:39:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:27,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024689374] [2022-12-13 11:39:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:27,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:39:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024689374] [2022-12-13 11:39:27,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024689374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939989092] [2022-12-13 11:39:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:27,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:27,524 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:39:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:27,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:39:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:39:27,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:27,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939989092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:27,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:39:27,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 11:39:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516660840] [2022-12-13 11:39:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:27,867 INFO L87 Difference]: Start difference. First operand 3488 states and 4109 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:28,416 INFO L93 Difference]: Finished difference Result 9221 states and 10936 transitions. [2022-12-13 11:39:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2022-12-13 11:39:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:28,427 INFO L225 Difference]: With dead ends: 9221 [2022-12-13 11:39:28,427 INFO L226 Difference]: Without dead ends: 6750 [2022-12-13 11:39:28,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:28,429 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 42 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:28,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 137 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:39:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6750 states. [2022-12-13 11:39:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6750 to 6747. [2022-12-13 11:39:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6747 states, 6746 states have (on average 1.1483842276904832) internal successors, (7747), 6746 states have internal predecessors, (7747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6747 states to 6747 states and 7747 transitions. [2022-12-13 11:39:28,501 INFO L78 Accepts]: Start accepts. Automaton has 6747 states and 7747 transitions. Word has length 248 [2022-12-13 11:39:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:28,502 INFO L495 AbstractCegarLoop]: Abstraction has 6747 states and 7747 transitions. [2022-12-13 11:39:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 6747 states and 7747 transitions. [2022-12-13 11:39:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-12-13 11:39:28,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:28,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:28,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:39:28,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 11:39:28,709 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1223070575, now seen corresponding path program 1 times [2022-12-13 11:39:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:28,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105837935] [2022-12-13 11:39:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:28,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:28,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:28,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105837935] [2022-12-13 11:39:28,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105837935] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:28,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:28,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422435624] [2022-12-13 11:39:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:28,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:28,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:28,998 INFO L87 Difference]: Start difference. First operand 6747 states and 7747 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:29,525 INFO L93 Difference]: Finished difference Result 17180 states and 19978 transitions. [2022-12-13 11:39:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 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 251 [2022-12-13 11:39:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:29,548 INFO L225 Difference]: With dead ends: 17180 [2022-12-13 11:39:29,548 INFO L226 Difference]: Without dead ends: 12465 [2022-12-13 11:39:29,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:29,553 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 206 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:29,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 84 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:39:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2022-12-13 11:39:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 12460. [2022-12-13 11:39:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12460 states, 12459 states have (on average 1.15177783128662) internal successors, (14350), 12459 states have internal predecessors, (14350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12460 states to 12460 states and 14350 transitions. [2022-12-13 11:39:29,685 INFO L78 Accepts]: Start accepts. Automaton has 12460 states and 14350 transitions. Word has length 251 [2022-12-13 11:39:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:29,685 INFO L495 AbstractCegarLoop]: Abstraction has 12460 states and 14350 transitions. [2022-12-13 11:39:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 12460 states and 14350 transitions. [2022-12-13 11:39:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-12-13 11:39:29,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:29,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:29,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:39:29,697 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 3857663, now seen corresponding path program 1 times [2022-12-13 11:39:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:29,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850387852] [2022-12-13 11:39:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:29,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 11:39:29,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:29,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850387852] [2022-12-13 11:39:29,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850387852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:29,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:29,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:29,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987084556] [2022-12-13 11:39:29,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:29,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:29,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:29,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:29,956 INFO L87 Difference]: Start difference. First operand 12460 states and 14350 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:30,489 INFO L93 Difference]: Finished difference Result 32260 states and 37087 transitions. [2022-12-13 11:39:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2022-12-13 11:39:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:30,515 INFO L225 Difference]: With dead ends: 32260 [2022-12-13 11:39:30,515 INFO L226 Difference]: Without dead ends: 20411 [2022-12-13 11:39:30,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:30,524 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:30,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 138 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:39:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20411 states. [2022-12-13 11:39:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20411 to 20405. [2022-12-13 11:39:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20405 states, 20404 states have (on average 1.1399235444030582) internal successors, (23259), 20404 states have internal predecessors, (23259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20405 states to 20405 states and 23259 transitions. [2022-12-13 11:39:30,727 INFO L78 Accepts]: Start accepts. Automaton has 20405 states and 23259 transitions. Word has length 262 [2022-12-13 11:39:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:30,728 INFO L495 AbstractCegarLoop]: Abstraction has 20405 states and 23259 transitions. [2022-12-13 11:39:30,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20405 states and 23259 transitions. [2022-12-13 11:39:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-12-13 11:39:30,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:30,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:30,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:39:30,753 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1098227865, now seen corresponding path program 1 times [2022-12-13 11:39:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11971279] [2022-12-13 11:39:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:31,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11971279] [2022-12-13 11:39:31,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11971279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:31,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:31,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:39:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748489074] [2022-12-13 11:39:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:31,011 INFO L87 Difference]: Start difference. First operand 20405 states and 23259 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:31,537 INFO L93 Difference]: Finished difference Result 36768 states and 42760 transitions. [2022-12-13 11:39:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:31,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 275 [2022-12-13 11:39:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:31,569 INFO L225 Difference]: With dead ends: 36768 [2022-12-13 11:39:31,569 INFO L226 Difference]: Without dead ends: 27355 [2022-12-13 11:39:31,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:39:31,578 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:31,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 158 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:39:31,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2022-12-13 11:39:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 25299. [2022-12-13 11:39:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25299 states, 25298 states have (on average 1.1620681476796584) internal successors, (29398), 25298 states have internal predecessors, (29398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25299 states to 25299 states and 29398 transitions. [2022-12-13 11:39:31,852 INFO L78 Accepts]: Start accepts. Automaton has 25299 states and 29398 transitions. Word has length 275 [2022-12-13 11:39:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:31,852 INFO L495 AbstractCegarLoop]: Abstraction has 25299 states and 29398 transitions. [2022-12-13 11:39:31,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 25299 states and 29398 transitions. [2022-12-13 11:39:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-12-13 11:39:31,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:31,867 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:31,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 11:39:31,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash -954979738, now seen corresponding path program 1 times [2022-12-13 11:39:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:31,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122800487] [2022-12-13 11:39:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 11:39:32,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122800487] [2022-12-13 11:39:32,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122800487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741652885] [2022-12-13 11:39:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:32,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:32,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:32,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:39:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:39:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 11:39:32,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 11:39:32,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741652885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:32,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:39:32,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-12-13 11:39:32,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890389342] [2022-12-13 11:39:32,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:32,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:39:32,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:39:32,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:39:32,734 INFO L87 Difference]: Start difference. First operand 25299 states and 29398 transitions. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:35,771 INFO L93 Difference]: Finished difference Result 110694 states and 131510 transitions. [2022-12-13 11:39:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:39:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 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 276 [2022-12-13 11:39:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:35,856 INFO L225 Difference]: With dead ends: 110694 [2022-12-13 11:39:35,856 INFO L226 Difference]: Without dead ends: 88646 [2022-12-13 11:39:35,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:39:35,878 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 2337 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 3622 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 3622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:35,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2337 Valid, 435 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 3622 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 11:39:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88646 states. [2022-12-13 11:39:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88646 to 86172. [2022-12-13 11:39:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86172 states, 86171 states have (on average 1.1491453041046291) internal successors, (99023), 86171 states have internal predecessors, (99023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86172 states to 86172 states and 99023 transitions. [2022-12-13 11:39:36,956 INFO L78 Accepts]: Start accepts. Automaton has 86172 states and 99023 transitions. Word has length 276 [2022-12-13 11:39:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:36,957 INFO L495 AbstractCegarLoop]: Abstraction has 86172 states and 99023 transitions. [2022-12-13 11:39:36,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 86172 states and 99023 transitions. [2022-12-13 11:39:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-12-13 11:39:36,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:36,982 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:36,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:37,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:39:37,185 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:37,186 INFO L85 PathProgramCache]: Analyzing trace with hash -177324733, now seen corresponding path program 1 times [2022-12-13 11:39:37,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:37,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292927941] [2022-12-13 11:39:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:37,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:37,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:37,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292927941] [2022-12-13 11:39:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292927941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:37,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:37,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505573279] [2022-12-13 11:39:37,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:37,497 INFO L87 Difference]: Start difference. First operand 86172 states and 99023 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:38,902 INFO L93 Difference]: Finished difference Result 183754 states and 210697 transitions. [2022-12-13 11:39:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:39:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 302 [2022-12-13 11:39:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:39,021 INFO L225 Difference]: With dead ends: 183754 [2022-12-13 11:39:39,021 INFO L226 Difference]: Without dead ends: 106953 [2022-12-13 11:39:39,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:39,070 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 365 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:39,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 90 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:39:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106953 states. [2022-12-13 11:39:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106953 to 106096. [2022-12-13 11:39:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106096 states, 106095 states have (on average 1.132287101182902) internal successors, (120130), 106095 states have internal predecessors, (120130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106096 states to 106096 states and 120130 transitions. [2022-12-13 11:39:40,287 INFO L78 Accepts]: Start accepts. Automaton has 106096 states and 120130 transitions. Word has length 302 [2022-12-13 11:39:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:40,288 INFO L495 AbstractCegarLoop]: Abstraction has 106096 states and 120130 transitions. [2022-12-13 11:39:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 106096 states and 120130 transitions. [2022-12-13 11:39:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-12-13 11:39:40,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:40,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:40,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 11:39:40,316 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash 104267680, now seen corresponding path program 1 times [2022-12-13 11:39:40,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:40,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939312396] [2022-12-13 11:39:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:40,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:40,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939312396] [2022-12-13 11:39:40,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939312396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:40,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:40,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:40,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975080040] [2022-12-13 11:39:40,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:40,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:40,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:40,620 INFO L87 Difference]: Start difference. First operand 106096 states and 120130 transitions. Second operand has 4 states, 4 states have (on average 78.5) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:42,069 INFO L93 Difference]: Finished difference Result 258430 states and 294134 transitions. [2022-12-13 11:39:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:39:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 314 [2022-12-13 11:39:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:42,255 INFO L225 Difference]: With dead ends: 258430 [2022-12-13 11:39:42,255 INFO L226 Difference]: Without dead ends: 163532 [2022-12-13 11:39:42,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:42,316 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 411 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:42,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 462 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:39:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163532 states. [2022-12-13 11:39:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163532 to 159668. [2022-12-13 11:39:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159668 states, 159667 states have (on average 1.1273400264300075) internal successors, (179999), 159667 states have internal predecessors, (179999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159668 states to 159668 states and 179999 transitions. [2022-12-13 11:39:44,438 INFO L78 Accepts]: Start accepts. Automaton has 159668 states and 179999 transitions. Word has length 314 [2022-12-13 11:39:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:44,439 INFO L495 AbstractCegarLoop]: Abstraction has 159668 states and 179999 transitions. [2022-12-13 11:39:44,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 159668 states and 179999 transitions. [2022-12-13 11:39:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-12-13 11:39:44,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:44,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:44,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 11:39:44,487 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1512807368, now seen corresponding path program 1 times [2022-12-13 11:39:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616320860] [2022-12-13 11:39:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 125 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:44,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:44,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616320860] [2022-12-13 11:39:44,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616320860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:44,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454949673] [2022-12-13 11:39:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:44,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:44,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:44,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:39:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:39:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-12-13 11:39:45,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454949673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:45,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:39:45,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 11:39:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79126555] [2022-12-13 11:39:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:45,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:45,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:45,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:45,335 INFO L87 Difference]: Start difference. First operand 159668 states and 179999 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:46,833 INFO L93 Difference]: Finished difference Result 352802 states and 400465 transitions. [2022-12-13 11:39:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:46,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 326 [2022-12-13 11:39:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:47,117 INFO L225 Difference]: With dead ends: 352802 [2022-12-13 11:39:47,118 INFO L226 Difference]: Without dead ends: 207580 [2022-12-13 11:39:47,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:47,211 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:47,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:39:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207580 states. [2022-12-13 11:39:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207580 to 186474. [2022-12-13 11:39:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186474 states, 186473 states have (on average 1.1294771897271991) internal successors, (210617), 186473 states have internal predecessors, (210617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186474 states to 186474 states and 210617 transitions. [2022-12-13 11:39:49,814 INFO L78 Accepts]: Start accepts. Automaton has 186474 states and 210617 transitions. Word has length 326 [2022-12-13 11:39:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:49,815 INFO L495 AbstractCegarLoop]: Abstraction has 186474 states and 210617 transitions. [2022-12-13 11:39:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 186474 states and 210617 transitions. [2022-12-13 11:39:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-12-13 11:39:49,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:49,886 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:49,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 11:39:50,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:39:50,088 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1420806845, now seen corresponding path program 1 times [2022-12-13 11:39:50,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:50,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324637137] [2022-12-13 11:39:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:50,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 145 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:39:50,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324637137] [2022-12-13 11:39:50,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324637137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:39:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966882285] [2022-12-13 11:39:50,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:39:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:39:50,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:39:50,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:39:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:50,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:39:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:39:50,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:39:50,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966882285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:50,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:39:50,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 11:39:50,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007185722] [2022-12-13 11:39:50,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:39:50,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:39:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:50,948 INFO L87 Difference]: Start difference. First operand 186474 states and 210617 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:52,894 INFO L93 Difference]: Finished difference Result 414376 states and 473373 transitions. [2022-12-13 11:39:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:39:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 339 [2022-12-13 11:39:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:53,160 INFO L225 Difference]: With dead ends: 414376 [2022-12-13 11:39:53,160 INFO L226 Difference]: Without dead ends: 233386 [2022-12-13 11:39:53,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:39:53,224 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 229 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:53,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 279 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:39:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233386 states. [2022-12-13 11:39:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233386 to 232949. [2022-12-13 11:39:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232949 states, 232948 states have (on average 1.1454487696825042) internal successors, (266830), 232948 states have internal predecessors, (266830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232949 states to 232949 states and 266830 transitions. [2022-12-13 11:39:56,312 INFO L78 Accepts]: Start accepts. Automaton has 232949 states and 266830 transitions. Word has length 339 [2022-12-13 11:39:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:39:56,312 INFO L495 AbstractCegarLoop]: Abstraction has 232949 states and 266830 transitions. [2022-12-13 11:39:56,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 232949 states and 266830 transitions. [2022-12-13 11:39:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-12-13 11:39:56,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:39:56,401 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:56,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:39:56,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:39:56,603 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:39:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash -743831960, now seen corresponding path program 1 times [2022-12-13 11:39:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:39:56,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445239415] [2022-12-13 11:39:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:39:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:39:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:39:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:39:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:39:57,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445239415] [2022-12-13 11:39:57,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445239415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:39:57,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:39:57,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:39:57,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210581074] [2022-12-13 11:39:57,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:39:57,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:39:57,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:39:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:39:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:57,098 INFO L87 Difference]: Start difference. First operand 232949 states and 266830 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:39:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:39:59,131 INFO L93 Difference]: Finished difference Result 468574 states and 537172 transitions. [2022-12-13 11:39:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:39:59,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 350 [2022-12-13 11:39:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:39:59,420 INFO L225 Difference]: With dead ends: 468574 [2022-12-13 11:39:59,420 INFO L226 Difference]: Without dead ends: 241312 [2022-12-13 11:39:59,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:39:59,506 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 383 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:39:59,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 447 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:39:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241312 states. [2022-12-13 11:40:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241312 to 235590. [2022-12-13 11:40:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235590 states, 235589 states have (on average 1.142048228058186) internal successors, (269054), 235589 states have internal predecessors, (269054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235590 states to 235590 states and 269054 transitions. [2022-12-13 11:40:02,978 INFO L78 Accepts]: Start accepts. Automaton has 235590 states and 269054 transitions. Word has length 350 [2022-12-13 11:40:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:02,978 INFO L495 AbstractCegarLoop]: Abstraction has 235590 states and 269054 transitions. [2022-12-13 11:40:02,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 235590 states and 269054 transitions. [2022-12-13 11:40:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-12-13 11:40:03,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:03,035 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:03,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 11:40:03,036 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503104, now seen corresponding path program 1 times [2022-12-13 11:40:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:03,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788802126] [2022-12-13 11:40:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:03,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 157 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:40:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788802126] [2022-12-13 11:40:03,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788802126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745092506] [2022-12-13 11:40:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:03,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:03,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:03,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:03,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:40:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:40:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 11:40:03,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:40:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745092506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:03,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:40:03,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 11:40:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593832192] [2022-12-13 11:40:03,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:40:03,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:40:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:03,651 INFO L87 Difference]: Start difference. First operand 235590 states and 269054 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 2 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) [2022-12-13 11:40:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:05,718 INFO L93 Difference]: Finished difference Result 494830 states and 568015 transitions. [2022-12-13 11:40:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 2 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) Word has length 354 [2022-12-13 11:40:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:06,044 INFO L225 Difference]: With dead ends: 494830 [2022-12-13 11:40:06,044 INFO L226 Difference]: Without dead ends: 267579 [2022-12-13 11:40:06,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:06,130 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 130 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:06,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 95 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:40:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267579 states. [2022-12-13 11:40:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267579 to 221335. [2022-12-13 11:40:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221335 states, 221334 states have (on average 1.1314890617799345) internal successors, (250437), 221334 states have internal predecessors, (250437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221335 states to 221335 states and 250437 transitions. [2022-12-13 11:40:09,285 INFO L78 Accepts]: Start accepts. Automaton has 221335 states and 250437 transitions. Word has length 354 [2022-12-13 11:40:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:09,285 INFO L495 AbstractCegarLoop]: Abstraction has 221335 states and 250437 transitions. [2022-12-13 11:40:09,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 2 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) [2022-12-13 11:40:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 221335 states and 250437 transitions. [2022-12-13 11:40:09,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-12-13 11:40:09,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:09,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:09,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 11:40:09,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:40:09,534 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1429936839, now seen corresponding path program 1 times [2022-12-13 11:40:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:09,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993616312] [2022-12-13 11:40:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 11:40:09,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:09,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993616312] [2022-12-13 11:40:09,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993616312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:09,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:09,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:40:09,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823646196] [2022-12-13 11:40:09,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:40:09,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:40:09,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:40:09,806 INFO L87 Difference]: Start difference. First operand 221335 states and 250437 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:11,648 INFO L93 Difference]: Finished difference Result 428501 states and 485164 transitions. [2022-12-13 11:40:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 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 378 [2022-12-13 11:40:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:12,022 INFO L225 Difference]: With dead ends: 428501 [2022-12-13 11:40:12,022 INFO L226 Difference]: Without dead ends: 273457 [2022-12-13 11:40:12,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:40:12,133 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 118 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:12,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 109 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:40:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273457 states. [2022-12-13 11:40:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273457 to 260453. [2022-12-13 11:40:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260453 states, 260452 states have (on average 1.1340093376130727) internal successors, (295355), 260452 states have internal predecessors, (295355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260453 states to 260453 states and 295355 transitions. [2022-12-13 11:40:15,814 INFO L78 Accepts]: Start accepts. Automaton has 260453 states and 295355 transitions. Word has length 378 [2022-12-13 11:40:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:15,814 INFO L495 AbstractCegarLoop]: Abstraction has 260453 states and 295355 transitions. [2022-12-13 11:40:15,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 260453 states and 295355 transitions. [2022-12-13 11:40:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-12-13 11:40:15,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:15,868 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:15,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 11:40:15,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1449033372, now seen corresponding path program 1 times [2022-12-13 11:40:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:15,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063357797] [2022-12-13 11:40:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 11:40:16,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063357797] [2022-12-13 11:40:16,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063357797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:16,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:16,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:40:16,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738721232] [2022-12-13 11:40:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:16,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:40:16,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:40:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:40:16,401 INFO L87 Difference]: Start difference. First operand 260453 states and 295355 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:18,496 INFO L93 Difference]: Finished difference Result 523276 states and 594130 transitions. [2022-12-13 11:40:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 380 [2022-12-13 11:40:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:18,991 INFO L225 Difference]: With dead ends: 523276 [2022-12-13 11:40:18,992 INFO L226 Difference]: Without dead ends: 265058 [2022-12-13 11:40:19,077 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 [2022-12-13 11:40:19,078 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 169 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:19,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 337 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:40:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265058 states. [2022-12-13 11:40:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265058 to 250062. [2022-12-13 11:40:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250062 states, 250061 states have (on average 1.1274608995405122) internal successors, (281934), 250061 states have internal predecessors, (281934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250062 states to 250062 states and 281934 transitions. [2022-12-13 11:40:22,511 INFO L78 Accepts]: Start accepts. Automaton has 250062 states and 281934 transitions. Word has length 380 [2022-12-13 11:40:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:22,512 INFO L495 AbstractCegarLoop]: Abstraction has 250062 states and 281934 transitions. [2022-12-13 11:40:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 250062 states and 281934 transitions. [2022-12-13 11:40:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-12-13 11:40:22,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:22,558 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 11:40:22,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash -586401925, now seen corresponding path program 1 times [2022-12-13 11:40:22,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:22,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234186077] [2022-12-13 11:40:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 226 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 11:40:23,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234186077] [2022-12-13 11:40:23,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234186077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604221965] [2022-12-13 11:40:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:23,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:23,070 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:23,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:40:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:40:23,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 172 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 11:40:23,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 24 proven. 172 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 11:40:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604221965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:23,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:40:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-12-13 11:40:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920170819] [2022-12-13 11:40:23,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:40:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:40:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:40:23,838 INFO L87 Difference]: Start difference. First operand 250062 states and 281934 transitions. Second operand has 6 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:27,954 INFO L93 Difference]: Finished difference Result 797433 states and 900567 transitions. [2022-12-13 11:40:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:40:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 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 381 [2022-12-13 11:40:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:28,636 INFO L225 Difference]: With dead ends: 797433 [2022-12-13 11:40:28,636 INFO L226 Difference]: Without dead ends: 560992 [2022-12-13 11:40:28,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:40:28,724 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 846 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:28,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 325 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 11:40:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560992 states. [2022-12-13 11:40:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560992 to 431653. [2022-12-13 11:40:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431653 states, 431652 states have (on average 1.1221331072252647) internal successors, (484371), 431652 states have internal predecessors, (484371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431653 states to 431653 states and 484371 transitions. [2022-12-13 11:40:35,254 INFO L78 Accepts]: Start accepts. Automaton has 431653 states and 484371 transitions. Word has length 381 [2022-12-13 11:40:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:35,255 INFO L495 AbstractCegarLoop]: Abstraction has 431653 states and 484371 transitions. [2022-12-13 11:40:35,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 431653 states and 484371 transitions. [2022-12-13 11:40:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-12-13 11:40:35,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:35,311 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:35,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:40:35,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:35,513 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1697827274, now seen corresponding path program 1 times [2022-12-13 11:40:35,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:35,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521765982] [2022-12-13 11:40:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 194 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 11:40:36,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521765982] [2022-12-13 11:40:36,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521765982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:40:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640548290] [2022-12-13 11:40:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:36,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:40:36,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:40:36,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:40:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:40:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:40:36,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:40:36,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640548290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:36,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:40:36,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 11:40:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521269724] [2022-12-13 11:40:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:36,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:40:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:40:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:36,323 INFO L87 Difference]: Start difference. First operand 431653 states and 484371 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:39,598 INFO L93 Difference]: Finished difference Result 970255 states and 1089302 transitions. [2022-12-13 11:40:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:40:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 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 383 [2022-12-13 11:40:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:40,508 INFO L225 Difference]: With dead ends: 970255 [2022-12-13 11:40:40,508 INFO L226 Difference]: Without dead ends: 625466 [2022-12-13 11:40:40,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:40,593 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 231 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:40,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 798 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:40:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625466 states. [2022-12-13 11:40:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625466 to 615695. [2022-12-13 11:40:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615695 states, 615694 states have (on average 1.1108505199011196) internal successors, (683944), 615694 states have internal predecessors, (683944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615695 states to 615695 states and 683944 transitions. [2022-12-13 11:40:48,987 INFO L78 Accepts]: Start accepts. Automaton has 615695 states and 683944 transitions. Word has length 383 [2022-12-13 11:40:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:40:48,987 INFO L495 AbstractCegarLoop]: Abstraction has 615695 states and 683944 transitions. [2022-12-13 11:40:48,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 615695 states and 683944 transitions. [2022-12-13 11:40:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-12-13 11:40:49,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:40:49,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:49,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:40:49,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:40:49,256 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:40:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1529278514, now seen corresponding path program 1 times [2022-12-13 11:40:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:40:49,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684684821] [2022-12-13 11:40:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:40:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:40:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:40:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:49,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:40:49,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684684821] [2022-12-13 11:40:49,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684684821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:49,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:49,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:40:49,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333489196] [2022-12-13 11:40:49,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:49,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:40:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:40:49,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:40:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:40:49,838 INFO L87 Difference]: Start difference. First operand 615695 states and 683944 transitions. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:40:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:40:54,008 INFO L93 Difference]: Finished difference Result 1222050 states and 1356839 transitions. [2022-12-13 11:40:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:40:54,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 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 383 [2022-12-13 11:40:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:40:54,936 INFO L225 Difference]: With dead ends: 1222050 [2022-12-13 11:40:54,936 INFO L226 Difference]: Without dead ends: 625482 [2022-12-13 11:40:55,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:40:55,102 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 339 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:40:55,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 336 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:40:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625482 states. [2022-12-13 11:41:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625482 to 617116. [2022-12-13 11:41:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617116 states, 617115 states have (on average 1.1086993510123722) internal successors, (684195), 617115 states have internal predecessors, (684195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:41:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617116 states to 617116 states and 684195 transitions. [2022-12-13 11:41:03,606 INFO L78 Accepts]: Start accepts. Automaton has 617116 states and 684195 transitions. Word has length 383 [2022-12-13 11:41:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:41:03,606 INFO L495 AbstractCegarLoop]: Abstraction has 617116 states and 684195 transitions. [2022-12-13 11:41:03,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:41:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 617116 states and 684195 transitions. [2022-12-13 11:41:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-12-13 11:41:03,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:41:03,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:41:03,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 11:41:03,704 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:41:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1873783654, now seen corresponding path program 1 times [2022-12-13 11:41:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:41:03,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743902414] [2022-12-13 11:41:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:41:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 11:41:04,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:41:04,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743902414] [2022-12-13 11:41:04,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743902414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:41:04,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:41:04,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:41:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593743499] [2022-12-13 11:41:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:41:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:41:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:41:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:41:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:41:04,174 INFO L87 Difference]: Start difference. First operand 617116 states and 684195 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:41:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:41:08,230 INFO L93 Difference]: Finished difference Result 1162273 states and 1288445 transitions. [2022-12-13 11:41:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:41:08,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 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 402 [2022-12-13 11:41:08,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:41:09,038 INFO L225 Difference]: With dead ends: 1162273 [2022-12-13 11:41:09,038 INFO L226 Difference]: Without dead ends: 634660 [2022-12-13 11:41:09,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:41:09,213 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:41:09,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 114 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:41:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634660 states. [2022-12-13 11:41:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634660 to 630976. [2022-12-13 11:41:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630976 states, 630975 states have (on average 1.1085383731526606) internal successors, (699460), 630975 states have internal predecessors, (699460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:41:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630976 states to 630976 states and 699460 transitions. [2022-12-13 11:41:17,903 INFO L78 Accepts]: Start accepts. Automaton has 630976 states and 699460 transitions. Word has length 402 [2022-12-13 11:41:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:41:17,904 INFO L495 AbstractCegarLoop]: Abstraction has 630976 states and 699460 transitions. [2022-12-13 11:41:17,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:41:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 630976 states and 699460 transitions. [2022-12-13 11:41:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-12-13 11:41:18,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:41:18,008 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:41:18,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 11:41:18,008 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:41:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1190948467, now seen corresponding path program 1 times [2022-12-13 11:41:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:41:18,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461422014] [2022-12-13 11:41:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:18,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:41:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:41:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 213 proven. 6 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-13 11:41:18,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:41:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461422014] [2022-12-13 11:41:18,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461422014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:41:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185596632] [2022-12-13 11:41:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:41:18,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:41:18,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:41:18,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:41:18,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b13ed8-0a64-41c2-9cec-4085b0934f58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process