./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label43.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label43.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a --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 b76d5bd3a937dd443771d4fd333665d0cd3fbe44dd72d1f97738d181d0765bea --- 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-b5237d8 [2022-11-21 16:49:59,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:49:59,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:49:59,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:49:59,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:49:59,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:49:59,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:49:59,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:49:59,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:49:59,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:49:59,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:49:59,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:49:59,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:49:59,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:49:59,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:49:59,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:49:59,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:49:59,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:49:59,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:49:59,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:49:59,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:49:59,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:49:59,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:49:59,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:49:59,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:49:59,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:49:59,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:49:59,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:49:59,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:49:59,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:49:59,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:49:59,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:49:59,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:49:59,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:49:59,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:49:59,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:49:59,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:49:59,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:49:59,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:49:59,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:49:59,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:49:59,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:49:59,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:49:59,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:49:59,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:49:59,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:49:59,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:49:59,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:49:59,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:49:59,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:49:59,375 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:49:59,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:49:59,375 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:49:59,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:49:59,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:49:59,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:49:59,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:49:59,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:49:59,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:49:59,378 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:49:59,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:49:59,379 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:49:59,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:49:59,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:49:59,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:49:59,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:49:59,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:49:59,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:49:59,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:49:59,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:49:59,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:49:59,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:49:59,383 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:49:59,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:49:59,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:49:59,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b76d5bd3a937dd443771d4fd333665d0cd3fbe44dd72d1f97738d181d0765bea [2022-11-21 16:49:59,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:49:59,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:49:59,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:49:59,740 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:49:59,741 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:49:59,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/eca-rers2012/Problem17_label43.c [2022-11-21 16:50:03,168 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:50:03,622 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:50:03,623 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/sv-benchmarks/c/eca-rers2012/Problem17_label43.c [2022-11-21 16:50:03,647 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/data/5a46bea47/e42a878ea2c0452cb6628834e6a8ec83/FLAGf2f1c963d [2022-11-21 16:50:03,671 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/data/5a46bea47/e42a878ea2c0452cb6628834e6a8ec83 [2022-11-21 16:50:03,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:50:03,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:50:03,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:50:03,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:50:03,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:50:03,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:50:03" (1/1) ... [2022-11-21 16:50:03,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e0b98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:03, skipping insertion in model container [2022-11-21 16:50:03,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:50:03" (1/1) ... [2022-11-21 16:50:03,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:50:03,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:50:04,239 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_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/sv-benchmarks/c/eca-rers2012/Problem17_label43.c[9211,9224] [2022-11-21 16:50:05,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:50:05,232 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:50:05,282 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_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/sv-benchmarks/c/eca-rers2012/Problem17_label43.c[9211,9224] [2022-11-21 16:50:05,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:50:05,770 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:50:05,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05 WrapperNode [2022-11-21 16:50:05,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:50:05,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:50:05,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:50:05,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:50:05,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:05,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,194 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-21 16:50:06,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:50:06,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:50:06,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:50:06,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:50:06,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:50:06,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:50:06,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:50:06,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:50:06,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (1/1) ... [2022-11-21 16:50:06,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:50:06,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:50:06,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:50:06,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:50:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:50:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:50:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:50:06,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:50:06,841 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:50:06,842 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:50:11,744 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:50:11,762 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:50:11,762 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:50:11,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:50:11 BoogieIcfgContainer [2022-11-21 16:50:11,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:50:11,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:50:11,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:50:11,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:50:11,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:50:03" (1/3) ... [2022-11-21 16:50:11,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747157fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:50:11, skipping insertion in model container [2022-11-21 16:50:11,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:50:05" (2/3) ... [2022-11-21 16:50:11,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747157fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:50:11, skipping insertion in model container [2022-11-21 16:50:11,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:50:11" (3/3) ... [2022-11-21 16:50:11,778 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label43.c [2022-11-21 16:50:11,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:50:11,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:50:11,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:50:11,904 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;@6a5a9643, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:50:11,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:50:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 16:50:11,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:11,926 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] [2022-11-21 16:50:11,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2022-11-21 16:50:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:11,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968200299] [2022-11-21 16:50:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:11,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:50:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968200299] [2022-11-21 16:50:12,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968200299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:12,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:12,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:50:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503661341] [2022-11-21 16:50:12,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:12,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:12,536 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:17,035 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2022-11-21 16:50:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-21 16:50:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:17,064 INFO L225 Difference]: With dead ends: 1680 [2022-11-21 16:50:17,065 INFO L226 Difference]: Without dead ends: 1011 [2022-11-21 16:50:17,071 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 [2022-11-21 16:50:17,075 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 519 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:17,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-21 16:50:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-11-21 16:50:17,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2022-11-21 16:50:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2022-11-21 16:50:17,179 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 62 [2022-11-21 16:50:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:17,180 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2022-11-21 16:50:17,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2022-11-21 16:50:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-21 16:50:17,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:17,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:17,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:50:17,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1373040103, now seen corresponding path program 1 times [2022-11-21 16:50:17,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:17,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781329699] [2022-11-21 16:50:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:17,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:50:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781329699] [2022-11-21 16:50:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781329699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:17,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:17,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:50:17,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146605296] [2022-11-21 16:50:17,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:17,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:17,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:17,450 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:21,431 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2022-11-21 16:50:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:21,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2022-11-21 16:50:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:21,440 INFO L225 Difference]: With dead ends: 2871 [2022-11-21 16:50:21,440 INFO L226 Difference]: Without dead ends: 1877 [2022-11-21 16:50:21,442 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 [2022-11-21 16:50:21,443 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-21 16:50:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-21 16:50:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2022-11-21 16:50:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2022-11-21 16:50:21,510 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 127 [2022-11-21 16:50:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:21,511 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2022-11-21 16:50:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2022-11-21 16:50:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-21 16:50:21,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:21,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:50:21,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash -87517194, now seen corresponding path program 1 times [2022-11-21 16:50:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:21,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833090478] [2022-11-21 16:50:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:50:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833090478] [2022-11-21 16:50:21,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833090478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:21,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:21,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684823543] [2022-11-21 16:50:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:21,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:21,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:21,858 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:25,609 INFO L93 Difference]: Finished difference Result 5454 states and 8039 transitions. [2022-11-21 16:50:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-21 16:50:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:25,625 INFO L225 Difference]: With dead ends: 5454 [2022-11-21 16:50:25,626 INFO L226 Difference]: Without dead ends: 3586 [2022-11-21 16:50:25,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:25,630 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 432 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:25,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 914 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-21 16:50:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2022-11-21 16:50:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3583. [2022-11-21 16:50:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3355667225013959) internal successors, (4784), 3582 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4784 transitions. [2022-11-21 16:50:25,727 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4784 transitions. Word has length 132 [2022-11-21 16:50:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:25,729 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 4784 transitions. [2022-11-21 16:50:25,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4784 transitions. [2022-11-21 16:50:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-21 16:50:25,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:25,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:50:25,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1657201363, now seen corresponding path program 1 times [2022-11-21 16:50:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301486985] [2022-11-21 16:50:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:50:26,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:26,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301486985] [2022-11-21 16:50:26,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301486985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:26,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:26,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:50:26,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618394961] [2022-11-21 16:50:26,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:26,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:26,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:26,116 INFO L87 Difference]: Start difference. First operand 3583 states and 4784 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:29,301 INFO L93 Difference]: Finished difference Result 10571 states and 14108 transitions. [2022-11-21 16:50:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2022-11-21 16:50:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:29,322 INFO L225 Difference]: With dead ends: 10571 [2022-11-21 16:50:29,322 INFO L226 Difference]: Without dead ends: 5286 [2022-11-21 16:50:29,328 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 [2022-11-21 16:50:29,330 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:29,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 16:50:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2022-11-21 16:50:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4434. [2022-11-21 16:50:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4433 states have (on average 1.2091134671779833) internal successors, (5360), 4433 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 5360 transitions. [2022-11-21 16:50:29,448 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 5360 transitions. Word has length 173 [2022-11-21 16:50:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:29,448 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 5360 transitions. [2022-11-21 16:50:29,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 5360 transitions. [2022-11-21 16:50:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-21 16:50:29,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:29,453 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, 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] [2022-11-21 16:50:29,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:50:29,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:29,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1123333363, now seen corresponding path program 1 times [2022-11-21 16:50:29,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:29,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805159178] [2022-11-21 16:50:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:50:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:29,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805159178] [2022-11-21 16:50:29,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805159178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:29,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:29,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583054043] [2022-11-21 16:50:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:29,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:29,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:29,977 INFO L87 Difference]: Start difference. First operand 4434 states and 5360 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:32,713 INFO L93 Difference]: Finished difference Result 11414 states and 14015 transitions. [2022-11-21 16:50:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2022-11-21 16:50:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:32,735 INFO L225 Difference]: With dead ends: 11414 [2022-11-21 16:50:32,735 INFO L226 Difference]: Without dead ends: 6982 [2022-11-21 16:50:32,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:32,742 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:32,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 16:50:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2022-11-21 16:50:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6982. [2022-11-21 16:50:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 1.1834980661796304) internal successors, (8262), 6981 states have internal predecessors, (8262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 8262 transitions. [2022-11-21 16:50:32,930 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 8262 transitions. Word has length 214 [2022-11-21 16:50:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:32,933 INFO L495 AbstractCegarLoop]: Abstraction has 6982 states and 8262 transitions. [2022-11-21 16:50:32,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 8262 transitions. [2022-11-21 16:50:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-21 16:50:32,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:32,944 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:32,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:50:32,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1873248117, now seen corresponding path program 1 times [2022-11-21 16:50:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405489626] [2022-11-21 16:50:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:32,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-21 16:50:33,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405489626] [2022-11-21 16:50:33,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405489626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:33,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:33,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830114274] [2022-11-21 16:50:33,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:33,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:33,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:33,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:33,304 INFO L87 Difference]: Start difference. First operand 6982 states and 8262 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:36,598 INFO L93 Difference]: Finished difference Result 17788 states and 21273 transitions. [2022-11-21 16:50:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:36,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-11-21 16:50:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:36,633 INFO L225 Difference]: With dead ends: 17788 [2022-11-21 16:50:36,633 INFO L226 Difference]: Without dead ends: 9958 [2022-11-21 16:50:36,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:36,643 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 384 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:36,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 858 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 16:50:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2022-11-21 16:50:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 9958. [2022-11-21 16:50:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 1.1449231696294064) internal successors, (11400), 9957 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 11400 transitions. [2022-11-21 16:50:36,896 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 11400 transitions. Word has length 294 [2022-11-21 16:50:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:36,897 INFO L495 AbstractCegarLoop]: Abstraction has 9958 states and 11400 transitions. [2022-11-21 16:50:36,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 11400 transitions. [2022-11-21 16:50:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-21 16:50:36,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:36,908 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, 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, 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] [2022-11-21 16:50:36,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:50:36,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash 707636462, now seen corresponding path program 1 times [2022-11-21 16:50:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214196] [2022-11-21 16:50:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-21 16:50:37,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:37,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214196] [2022-11-21 16:50:37,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:37,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:37,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:37,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802755763] [2022-11-21 16:50:37,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:37,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:37,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:37,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:37,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:37,263 INFO L87 Difference]: Start difference. First operand 9958 states and 11400 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:40,246 INFO L93 Difference]: Finished difference Result 25024 states and 28867 transitions. [2022-11-21 16:50:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 334 [2022-11-21 16:50:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:40,283 INFO L225 Difference]: With dead ends: 25024 [2022-11-21 16:50:40,283 INFO L226 Difference]: Without dead ends: 14184 [2022-11-21 16:50:40,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:40,295 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 488 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:40,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 644 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-21 16:50:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14184 states. [2022-11-21 16:50:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14184 to 13326. [2022-11-21 16:50:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13325 states have (on average 1.1366604127579738) internal successors, (15146), 13325 states have internal predecessors, (15146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 15146 transitions. [2022-11-21 16:50:40,567 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 15146 transitions. Word has length 334 [2022-11-21 16:50:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:40,568 INFO L495 AbstractCegarLoop]: Abstraction has 13326 states and 15146 transitions. [2022-11-21 16:50:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 15146 transitions. [2022-11-21 16:50:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-21 16:50:40,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:40,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:40,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:50:40,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 902850880, now seen corresponding path program 1 times [2022-11-21 16:50:40,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:40,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90196396] [2022-11-21 16:50:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:50:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90196396] [2022-11-21 16:50:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90196396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:41,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:41,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625938855] [2022-11-21 16:50:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:41,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:50:41,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:41,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:50:41,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:50:41,388 INFO L87 Difference]: Start difference. First operand 13326 states and 15146 transitions. Second operand has 4 states, 4 states have (on average 100.25) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:45,485 INFO L93 Difference]: Finished difference Result 31362 states and 35698 transitions. [2022-11-21 16:50:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:50:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.25) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 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 401 [2022-11-21 16:50:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:45,523 INFO L225 Difference]: With dead ends: 31362 [2022-11-21 16:50:45,524 INFO L226 Difference]: Without dead ends: 17613 [2022-11-21 16:50:45,537 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 [2022-11-21 16:50:45,538 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 593 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:45,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 179 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-21 16:50:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17613 states. [2022-11-21 16:50:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17613 to 17608. [2022-11-21 16:50:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17608 states, 17607 states have (on average 1.1423865508036577) internal successors, (20114), 17607 states have internal predecessors, (20114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17608 states to 17608 states and 20114 transitions. [2022-11-21 16:50:45,856 INFO L78 Accepts]: Start accepts. Automaton has 17608 states and 20114 transitions. Word has length 401 [2022-11-21 16:50:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:45,857 INFO L495 AbstractCegarLoop]: Abstraction has 17608 states and 20114 transitions. [2022-11-21 16:50:45,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.25) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 17608 states and 20114 transitions. [2022-11-21 16:50:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-11-21 16:50:45,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:45,882 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:50:45,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:50:45,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash 992577291, now seen corresponding path program 1 times [2022-11-21 16:50:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:45,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821087328] [2022-11-21 16:50:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-21 16:50:46,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821087328] [2022-11-21 16:50:46,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821087328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:46,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:46,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:46,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014827506] [2022-11-21 16:50:46,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:46,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:46,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:46,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:46,325 INFO L87 Difference]: Start difference. First operand 17608 states and 20114 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:49,503 INFO L93 Difference]: Finished difference Result 45865 states and 52464 transitions. [2022-11-21 16:50:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 504 [2022-11-21 16:50:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:49,563 INFO L225 Difference]: With dead ends: 45865 [2022-11-21 16:50:49,564 INFO L226 Difference]: Without dead ends: 28259 [2022-11-21 16:50:49,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:49,582 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 490 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:49,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 248 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-21 16:50:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28259 states. [2022-11-21 16:50:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28259 to 28242. [2022-11-21 16:50:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28242 states, 28241 states have (on average 1.132006656988067) internal successors, (31969), 28241 states have internal predecessors, (31969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28242 states to 28242 states and 31969 transitions. [2022-11-21 16:50:50,249 INFO L78 Accepts]: Start accepts. Automaton has 28242 states and 31969 transitions. Word has length 504 [2022-11-21 16:50:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:50,253 INFO L495 AbstractCegarLoop]: Abstraction has 28242 states and 31969 transitions. [2022-11-21 16:50:50,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 28242 states and 31969 transitions. [2022-11-21 16:50:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-21 16:50:50,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:50,281 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-21 16:50:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:50:50,282 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 872769737, now seen corresponding path program 1 times [2022-11-21 16:50:50,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:50,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207068172] [2022-11-21 16:50:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-21 16:50:50,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207068172] [2022-11-21 16:50:50,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207068172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:50,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:50,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:50:50,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39265927] [2022-11-21 16:50:50,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:50,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:50:50,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:50,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:50:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:50,897 INFO L87 Difference]: Start difference. First operand 28242 states and 31969 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:50:53,687 INFO L93 Difference]: Finished difference Result 62013 states and 70477 transitions. [2022-11-21 16:50:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:50:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 558 [2022-11-21 16:50:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:50:53,746 INFO L225 Difference]: With dead ends: 62013 [2022-11-21 16:50:53,746 INFO L226 Difference]: Without dead ends: 34198 [2022-11-21 16:50:53,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:50:53,768 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 486 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:50:53,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 696 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 16:50:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34198 states. [2022-11-21 16:50:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34198 to 34194. [2022-11-21 16:50:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34194 states, 34193 states have (on average 1.126926563916591) internal successors, (38533), 34193 states have internal predecessors, (38533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34194 states to 34194 states and 38533 transitions. [2022-11-21 16:50:54,608 INFO L78 Accepts]: Start accepts. Automaton has 34194 states and 38533 transitions. Word has length 558 [2022-11-21 16:50:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:50:54,609 INFO L495 AbstractCegarLoop]: Abstraction has 34194 states and 38533 transitions. [2022-11-21 16:50:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34194 states and 38533 transitions. [2022-11-21 16:50:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2022-11-21 16:50:54,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:50:54,660 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:50:54,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:50:54,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:50:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:50:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 110829797, now seen corresponding path program 1 times [2022-11-21 16:50:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:50:54,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245440912] [2022-11-21 16:50:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:50:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:50:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:50:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2022-11-21 16:50:56,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:50:56,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245440912] [2022-11-21 16:50:56,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245440912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:50:56,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:50:56,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:50:56,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749354682] [2022-11-21 16:50:56,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:50:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:50:56,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:50:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:50:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:50:56,570 INFO L87 Difference]: Start difference. First operand 34194 states and 38533 transitions. Second operand has 5 states, 5 states have (on average 74.6) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:00,624 INFO L93 Difference]: Finished difference Result 69715 states and 78566 transitions. [2022-11-21 16:51:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:51:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 74.6) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 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 647 [2022-11-21 16:51:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:00,670 INFO L225 Difference]: With dead ends: 69715 [2022-11-21 16:51:00,671 INFO L226 Difference]: Without dead ends: 35881 [2022-11-21 16:51:00,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:51:00,691 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 855 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:00,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 196 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-21 16:51:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35881 states. [2022-11-21 16:51:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35881 to 35450. [2022-11-21 16:51:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35450 states, 35449 states have (on average 1.1148410392394708) internal successors, (39520), 35449 states have internal predecessors, (39520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35450 states to 35450 states and 39520 transitions. [2022-11-21 16:51:01,348 INFO L78 Accepts]: Start accepts. Automaton has 35450 states and 39520 transitions. Word has length 647 [2022-11-21 16:51:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:01,350 INFO L495 AbstractCegarLoop]: Abstraction has 35450 states and 39520 transitions. [2022-11-21 16:51:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.6) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 35450 states and 39520 transitions. [2022-11-21 16:51:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-11-21 16:51:01,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:01,384 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:51:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:51:01,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1913167228, now seen corresponding path program 1 times [2022-11-21 16:51:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:01,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24433645] [2022-11-21 16:51:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-21 16:51:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24433645] [2022-11-21 16:51:02,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24433645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:51:02,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:51:02,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:51:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629564121] [2022-11-21 16:51:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:51:02,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:02,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:51:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:02,204 INFO L87 Difference]: Start difference. First operand 35450 states and 39520 transitions. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:04,942 INFO L93 Difference]: Finished difference Result 78117 states and 87128 transitions. [2022-11-21 16:51:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:51:04,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 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 659 [2022-11-21 16:51:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:04,988 INFO L225 Difference]: With dead ends: 78117 [2022-11-21 16:51:04,988 INFO L226 Difference]: Without dead ends: 43094 [2022-11-21 16:51:05,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:05,004 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 383 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:05,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 334 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 16:51:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43094 states. [2022-11-21 16:51:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43094 to 37973. [2022-11-21 16:51:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37973 states, 37972 states have (on average 1.1091067102075214) internal successors, (42115), 37972 states have internal predecessors, (42115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37973 states to 37973 states and 42115 transitions. [2022-11-21 16:51:05,577 INFO L78 Accepts]: Start accepts. Automaton has 37973 states and 42115 transitions. Word has length 659 [2022-11-21 16:51:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:05,578 INFO L495 AbstractCegarLoop]: Abstraction has 37973 states and 42115 transitions. [2022-11-21 16:51:05,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 37973 states and 42115 transitions. [2022-11-21 16:51:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-11-21 16:51:05,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:05,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:51:05,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:51:05,623 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1473293802, now seen corresponding path program 1 times [2022-11-21 16:51:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712412508] [2022-11-21 16:51:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:05,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-11-21 16:51:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712412508] [2022-11-21 16:51:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712412508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:51:07,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:51:07,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:51:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992805287] [2022-11-21 16:51:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:07,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:51:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:51:07,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:07,452 INFO L87 Difference]: Start difference. First operand 37973 states and 42115 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:10,374 INFO L93 Difference]: Finished difference Result 82760 states and 92371 transitions. [2022-11-21 16:51:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:51:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 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 869 [2022-11-21 16:51:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:10,424 INFO L225 Difference]: With dead ends: 82760 [2022-11-21 16:51:10,424 INFO L226 Difference]: Without dead ends: 44364 [2022-11-21 16:51:10,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:10,435 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 405 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:10,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 739 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 16:51:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44364 states. [2022-11-21 16:51:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44364 to 44358. [2022-11-21 16:51:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44358 states, 44357 states have (on average 1.1086863403746872) internal successors, (49178), 44357 states have internal predecessors, (49178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44358 states to 44358 states and 49178 transitions. [2022-11-21 16:51:11,026 INFO L78 Accepts]: Start accepts. Automaton has 44358 states and 49178 transitions. Word has length 869 [2022-11-21 16:51:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:11,027 INFO L495 AbstractCegarLoop]: Abstraction has 44358 states and 49178 transitions. [2022-11-21 16:51:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 44358 states and 49178 transitions. [2022-11-21 16:51:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-11-21 16:51:11,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:11,067 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:51:11,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:51:11,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1168926298, now seen corresponding path program 1 times [2022-11-21 16:51:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:11,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453090179] [2022-11-21 16:51:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:11,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 567 proven. 243 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-21 16:51:13,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:13,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453090179] [2022-11-21 16:51:13,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453090179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:51:13,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264819629] [2022-11-21 16:51:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:13,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:51:13,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:51:13,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:51:13,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:51:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:51:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:51:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 567 proven. 243 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-21 16:51:15,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:51:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 567 proven. 243 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-21 16:51:17,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264819629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:51:17,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:51:17,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-21 16:51:17,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811947314] [2022-11-21 16:51:17,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:51:17,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:51:17,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:51:17,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:51:17,890 INFO L87 Difference]: Start difference. First operand 44358 states and 49178 transitions. Second operand has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:23,465 INFO L93 Difference]: Finished difference Result 92955 states and 103373 transitions. [2022-11-21 16:51:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:51:23,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 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 872 [2022-11-21 16:51:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:23,510 INFO L225 Difference]: With dead ends: 92955 [2022-11-21 16:51:23,511 INFO L226 Difference]: Without dead ends: 48174 [2022-11-21 16:51:23,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1742 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:51:23,529 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 692 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 3364 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 3661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 3364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:23,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 739 Invalid, 3661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 3364 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-21 16:51:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48174 states. [2022-11-21 16:51:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48174 to 40929. [2022-11-21 16:51:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40929 states, 40928 states have (on average 1.0906958561376074) internal successors, (44640), 40928 states have internal predecessors, (44640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40929 states to 40929 states and 44640 transitions. [2022-11-21 16:51:24,138 INFO L78 Accepts]: Start accepts. Automaton has 40929 states and 44640 transitions. Word has length 872 [2022-11-21 16:51:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:24,138 INFO L495 AbstractCegarLoop]: Abstraction has 40929 states and 44640 transitions. [2022-11-21 16:51:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.66666666666666) internal successors, (1438), 6 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 40929 states and 44640 transitions. [2022-11-21 16:51:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2022-11-21 16:51:24,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:24,185 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:51:24,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:51:24,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:51:24,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash 489023534, now seen corresponding path program 1 times [2022-11-21 16:51:24,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:24,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083083114] [2022-11-21 16:51:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1439 backedges. 1110 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-21 16:51:25,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:25,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083083114] [2022-11-21 16:51:25,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083083114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:51:25,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:51:25,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:51:25,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213313305] [2022-11-21 16:51:25,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:51:25,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:25,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:51:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:25,477 INFO L87 Difference]: Start difference. First operand 40929 states and 44640 transitions. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:27,944 INFO L93 Difference]: Finished difference Result 87818 states and 96100 transitions. [2022-11-21 16:51:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:51:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 927 [2022-11-21 16:51:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:28,000 INFO L225 Difference]: With dead ends: 87818 [2022-11-21 16:51:28,001 INFO L226 Difference]: Without dead ends: 46464 [2022-11-21 16:51:28,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:28,020 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 185 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:28,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 596 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:51:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46464 states. [2022-11-21 16:51:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46464 to 46456. [2022-11-21 16:51:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46456 states, 46455 states have (on average 1.0927994833710042) internal successors, (50766), 46455 states have internal predecessors, (50766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46456 states to 46456 states and 50766 transitions. [2022-11-21 16:51:28,630 INFO L78 Accepts]: Start accepts. Automaton has 46456 states and 50766 transitions. Word has length 927 [2022-11-21 16:51:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:28,631 INFO L495 AbstractCegarLoop]: Abstraction has 46456 states and 50766 transitions. [2022-11-21 16:51:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 46456 states and 50766 transitions. [2022-11-21 16:51:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2022-11-21 16:51:28,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:28,816 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:51:28,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:51:28,816 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash -813960966, now seen corresponding path program 1 times [2022-11-21 16:51:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:28,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224785023] [2022-11-21 16:51:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:28,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 810 proven. 82 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-21 16:51:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224785023] [2022-11-21 16:51:30,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224785023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:51:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490168372] [2022-11-21 16:51:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:30,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:51:30,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:51:30,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:51:30,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:51:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:51:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:51:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1263 proven. 246 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-21 16:51:32,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:51:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 1509 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-21 16:51:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490168372] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:51:33,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:51:33,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 5] total 11 [2022-11-21 16:51:33,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122695913] [2022-11-21 16:51:33,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:33,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:51:33,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:51:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:51:33,392 INFO L87 Difference]: Start difference. First operand 46456 states and 50766 transitions. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:37,281 INFO L93 Difference]: Finished difference Result 99282 states and 108738 transitions. [2022-11-21 16:51:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:51:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 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 983 [2022-11-21 16:51:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:37,332 INFO L225 Difference]: With dead ends: 99282 [2022-11-21 16:51:37,332 INFO L226 Difference]: Without dead ends: 52403 [2022-11-21 16:51:37,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1957 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:51:37,348 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 979 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:37,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 113 Invalid, 3110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 16:51:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52403 states. [2022-11-21 16:51:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52403 to 43473. [2022-11-21 16:51:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43473 states, 43472 states have (on average 1.0889998159735002) internal successors, (47341), 43472 states have internal predecessors, (47341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43473 states to 43473 states and 47341 transitions. [2022-11-21 16:51:37,888 INFO L78 Accepts]: Start accepts. Automaton has 43473 states and 47341 transitions. Word has length 983 [2022-11-21 16:51:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:37,888 INFO L495 AbstractCegarLoop]: Abstraction has 43473 states and 47341 transitions. [2022-11-21 16:51:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 5 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43473 states and 47341 transitions. [2022-11-21 16:51:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2022-11-21 16:51:37,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:37,928 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-11-21 16:51:37,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:51:38,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:51:38,130 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash 938627857, now seen corresponding path program 1 times [2022-11-21 16:51:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:38,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431795616] [2022-11-21 16:51:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 1363 proven. 0 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-21 16:51:39,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431795616] [2022-11-21 16:51:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431795616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:51:39,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:51:39,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:51:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609652919] [2022-11-21 16:51:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:39,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:51:39,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:51:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:51:39,617 INFO L87 Difference]: Start difference. First operand 43473 states and 47341 transitions. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:43,451 INFO L93 Difference]: Finished difference Result 104844 states and 114509 transitions. [2022-11-21 16:51:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:51:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 1047 [2022-11-21 16:51:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:43,525 INFO L225 Difference]: With dead ends: 104844 [2022-11-21 16:51:43,525 INFO L226 Difference]: Without dead ends: 61798 [2022-11-21 16:51:43,553 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 [2022-11-21 16:51:43,553 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 758 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:43,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 111 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-21 16:51:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61798 states. [2022-11-21 16:51:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61798 to 60942. [2022-11-21 16:51:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60942 states, 60941 states have (on average 1.0872647314615775) internal successors, (66259), 60941 states have internal predecessors, (66259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60942 states to 60942 states and 66259 transitions. [2022-11-21 16:51:44,453 INFO L78 Accepts]: Start accepts. Automaton has 60942 states and 66259 transitions. Word has length 1047 [2022-11-21 16:51:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:44,454 INFO L495 AbstractCegarLoop]: Abstraction has 60942 states and 66259 transitions. [2022-11-21 16:51:44,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 60942 states and 66259 transitions. [2022-11-21 16:51:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2022-11-21 16:51:44,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:44,508 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2022-11-21 16:51:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:51:44,509 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1579873428, now seen corresponding path program 1 times [2022-11-21 16:51:44,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:44,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245781632] [2022-11-21 16:51:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 1160 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-11-21 16:51:46,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245781632] [2022-11-21 16:51:46,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245781632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:51:46,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:51:46,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:51:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290907346] [2022-11-21 16:51:46,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:46,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:51:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:51:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:46,461 INFO L87 Difference]: Start difference. First operand 60942 states and 66259 transitions. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:48,913 INFO L93 Difference]: Finished difference Result 123586 states and 134311 transitions. [2022-11-21 16:51:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:51:48,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 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 1072 [2022-11-21 16:51:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:48,986 INFO L225 Difference]: With dead ends: 123586 [2022-11-21 16:51:48,986 INFO L226 Difference]: Without dead ends: 63071 [2022-11-21 16:51:49,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:51:49,018 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 113 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:49,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 717 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 16:51:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63071 states. [2022-11-21 16:51:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63071 to 62643. [2022-11-21 16:51:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62643 states, 62642 states have (on average 1.0845918074135563) internal successors, (67941), 62642 states have internal predecessors, (67941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62643 states to 62643 states and 67941 transitions. [2022-11-21 16:51:50,432 INFO L78 Accepts]: Start accepts. Automaton has 62643 states and 67941 transitions. Word has length 1072 [2022-11-21 16:51:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:50,432 INFO L495 AbstractCegarLoop]: Abstraction has 62643 states and 67941 transitions. [2022-11-21 16:51:50,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 62643 states and 67941 transitions. [2022-11-21 16:51:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2022-11-21 16:51:50,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:50,488 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:51:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 16:51:50,489 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:51:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1386724084, now seen corresponding path program 1 times [2022-11-21 16:51:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:51:50,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833070803] [2022-11-21 16:51:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:50,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:51:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 419 proven. 555 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2022-11-21 16:51:53,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:51:53,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833070803] [2022-11-21 16:51:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833070803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:51:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910800488] [2022-11-21 16:51:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:51:53,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:51:53,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:51:53,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:51:53,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:51:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:51:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:51:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:51:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 602 proven. 78 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2022-11-21 16:51:54,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:51:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2022-11-21 16:51:54,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910800488] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:51:54,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:51:54,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-11-21 16:51:54,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390052691] [2022-11-21 16:51:54,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:51:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:51:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:51:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:51:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:51:54,402 INFO L87 Difference]: Start difference. First operand 62643 states and 67941 transitions. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:58,468 INFO L93 Difference]: Finished difference Result 143605 states and 156014 transitions. [2022-11-21 16:51:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:51:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 1077 [2022-11-21 16:51:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:58,546 INFO L225 Difference]: With dead ends: 143605 [2022-11-21 16:51:58,547 INFO L226 Difference]: Without dead ends: 81389 [2022-11-21 16:51:58,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2156 GetRequests, 2149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:51:58,574 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 786 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:58,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 120 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 16:51:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81389 states. [2022-11-21 16:51:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81389 to 77563. [2022-11-21 16:51:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77563 states, 77562 states have (on average 1.0870013666486167) internal successors, (84310), 77562 states have internal predecessors, (84310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77563 states to 77563 states and 84310 transitions. [2022-11-21 16:51:59,992 INFO L78 Accepts]: Start accepts. Automaton has 77563 states and 84310 transitions. Word has length 1077 [2022-11-21 16:51:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:59,993 INFO L495 AbstractCegarLoop]: Abstraction has 77563 states and 84310 transitions. [2022-11-21 16:51:59,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 77563 states and 84310 transitions. [2022-11-21 16:52:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1119 [2022-11-21 16:52:00,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:00,055 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2022-11-21 16:52:00,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:52:00,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde86e8e-2095-49a4-ae1a-ec8f7ed12aa7/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:52:00,262 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1859997729, now seen corresponding path program 1 times [2022-11-21 16:52:00,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:00,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789141887] [2022-11-21 16:52:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:00,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2217 backedges. 1688 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-11-21 16:52:01,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:01,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789141887] [2022-11-21 16:52:01,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789141887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:01,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:01,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:52:01,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843573622] [2022-11-21 16:52:01,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:52:01,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:52:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:52:01,978 INFO L87 Difference]: Start difference. First operand 77563 states and 84310 transitions. Second operand has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:06,031 INFO L93 Difference]: Finished difference Result 149989 states and 162841 transitions. [2022-11-21 16:52:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 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 1118 [2022-11-21 16:52:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:06,105 INFO L225 Difference]: With dead ends: 149989 [2022-11-21 16:52:06,105 INFO L226 Difference]: Without dead ends: 72853 [2022-11-21 16:52:06,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:52:06,135 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 605 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:06,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 288 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2662 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 16:52:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72853 states. [2022-11-21 16:52:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72853 to 67747. [2022-11-21 16:52:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67747 states, 67746 states have (on average 1.077879136775603) internal successors, (73022), 67746 states have internal predecessors, (73022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67747 states to 67747 states and 73022 transitions. [2022-11-21 16:52:07,360 INFO L78 Accepts]: Start accepts. Automaton has 67747 states and 73022 transitions. Word has length 1118 [2022-11-21 16:52:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:07,361 INFO L495 AbstractCegarLoop]: Abstraction has 67747 states and 73022 transitions. [2022-11-21 16:52:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.75) internal successors, (735), 4 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 67747 states and 73022 transitions. [2022-11-21 16:52:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1179 [2022-11-21 16:52:07,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:07,455 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:52:07,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 16:52:07,455 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1000427183, now seen corresponding path program 1 times [2022-11-21 16:52:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:07,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251872745] [2022-11-21 16:52:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:07,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:52:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1258 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-21 16:52:08,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:52:08,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251872745] [2022-11-21 16:52:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251872745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:52:08,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:52:08,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:52:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541940173] [2022-11-21 16:52:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:52:08,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:52:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:52:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:52:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:52:08,918 INFO L87 Difference]: Start difference. First operand 67747 states and 73022 transitions. Second operand has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:52:12,443 INFO L93 Difference]: Finished difference Result 145312 states and 156230 transitions. [2022-11-21 16:52:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:52:12,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 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 1178 [2022-11-21 16:52:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:52:12,516 INFO L225 Difference]: With dead ends: 145312 [2022-11-21 16:52:12,517 INFO L226 Difference]: Without dead ends: 77992 [2022-11-21 16:52:12,551 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 [2022-11-21 16:52:12,552 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 570 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:52:12,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 639 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-21 16:52:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77992 states. [2022-11-21 16:52:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77992 to 67747. [2022-11-21 16:52:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67747 states, 67746 states have (on average 1.0772739349924718) internal successors, (72981), 67746 states have internal predecessors, (72981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67747 states to 67747 states and 72981 transitions. [2022-11-21 16:52:13,902 INFO L78 Accepts]: Start accepts. Automaton has 67747 states and 72981 transitions. Word has length 1178 [2022-11-21 16:52:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:52:13,903 INFO L495 AbstractCegarLoop]: Abstraction has 67747 states and 72981 transitions. [2022-11-21 16:52:13,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:52:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 67747 states and 72981 transitions. [2022-11-21 16:52:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1203 [2022-11-21 16:52:14,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:52:14,008 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 16:52:14,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:52:14,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:52:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:52:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash 64215828, now seen corresponding path program 1 times [2022-11-21 16:52:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:52:14,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559238195] [2022-11-21 16:52:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:52:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:52:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat