./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/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_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/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_5e95177e-32b5-4a3f-8c94-7be5f1350fff/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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- 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 13:54:06,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:54:06,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:54:06,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:54:06,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:54:06,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:54:06,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:54:06,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:54:06,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:54:06,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:54:06,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:54:06,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:54:06,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:54:06,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:54:06,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:54:06,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:54:06,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:54:06,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:54:06,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:54:06,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:54:06,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:54:06,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:54:06,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:54:06,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:54:06,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:54:06,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:54:06,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:54:06,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:54:06,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:54:06,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:54:06,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:54:06,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:54:06,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:54:06,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:54:06,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:54:06,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:54:06,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:54:06,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:54:06,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:54:06,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:54:06,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:54:06,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:54:06,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:54:06,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:54:06,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:54:06,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:54:06,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:54:06,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:54:06,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:54:06,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:54:06,471 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:54:06,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:54:06,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:54:06,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:54:06,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:54:06,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:54:06,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:54:06,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:54:06,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:54:06,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:54:06,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:54:06,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:54:06,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:54:06,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:54:06,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:54:06,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:54:06,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:54:06,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:54:06,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:54:06,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:54:06,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:54:06,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:54:06,476 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:54:06,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:54:06,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:54:06,477 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_5e95177e-32b5-4a3f-8c94-7be5f1350fff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2022-11-21 13:54:06,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:54:06,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:54:06,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:54:06,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:54:06,770 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:54:06,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/recursive/Ackermann03.c [2022-11-21 13:54:09,743 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:54:10,008 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:54:10,009 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/sv-benchmarks/c/recursive/Ackermann03.c [2022-11-21 13:54:10,015 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/data/ba5b67a2f/649d1440f32a43da93aa0ca8a6d454ca/FLAG049732edb [2022-11-21 13:54:10,036 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/data/ba5b67a2f/649d1440f32a43da93aa0ca8a6d454ca [2022-11-21 13:54:10,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:54:10,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:54:10,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:54:10,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:54:10,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:54:10,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34891e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10, skipping insertion in model container [2022-11-21 13:54:10,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:54:10,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:54:10,234 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_5e95177e-32b5-4a3f-8c94-7be5f1350fff/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2022-11-21 13:54:10,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:54:10,248 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:54:10,264 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_5e95177e-32b5-4a3f-8c94-7be5f1350fff/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2022-11-21 13:54:10,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:54:10,278 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:54:10,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10 WrapperNode [2022-11-21 13:54:10,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:54:10,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:54:10,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:54:10,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:54:10,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,310 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-21 13:54:10,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:54:10,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:54:10,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:54:10,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:54:10,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:54:10,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:54:10,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:54:10,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:54:10,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (1/1) ... [2022-11-21 13:54:10,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:54:10,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:10,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:54:10,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:54:10,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:54:10,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:54:10,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:54:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-11-21 13:54:10,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-11-21 13:54:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:54:10,501 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:54:10,503 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:54:10,708 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:54:10,729 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:54:10,730 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 13:54:10,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:54:10 BoogieIcfgContainer [2022-11-21 13:54:10,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:54:10,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:54:10,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:54:10,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:54:10,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:54:10" (1/3) ... [2022-11-21 13:54:10,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fcc9d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:54:10, skipping insertion in model container [2022-11-21 13:54:10,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:54:10" (2/3) ... [2022-11-21 13:54:10,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fcc9d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:54:10, skipping insertion in model container [2022-11-21 13:54:10,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:54:10" (3/3) ... [2022-11-21 13:54:10,754 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2022-11-21 13:54:10,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:54:10,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:54:10,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:54:10,894 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;@15b8e115, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:54:10,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:54:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 13:54:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:54:10,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:10,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:10,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2022-11-21 13:54:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:10,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940874460] [2022-11-21 13:54:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:11,252 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 13:54:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:11,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940874460] [2022-11-21 13:54:11,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940874460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:54:11,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:54:11,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:54:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225271070] [2022-11-21 13:54:11,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:54:11,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:54:11,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:54:11,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:54:11,294 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 13:54:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:11,440 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2022-11-21 13:54:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:54:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-21 13:54:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:11,473 INFO L225 Difference]: With dead ends: 51 [2022-11-21 13:54:11,473 INFO L226 Difference]: Without dead ends: 25 [2022-11-21 13:54:11,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:54:11,487 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:11,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:54:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-21 13:54:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-21 13:54:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 13:54:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-21 13:54:11,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2022-11-21 13:54:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:11,543 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-21 13:54:11,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-21 13:54:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-21 13:54:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:54:11,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:11,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:11,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:54:11,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:11,547 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2022-11-21 13:54:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:11,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019081253] [2022-11-21 13:54:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:11,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:11,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:54:11,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019081253] [2022-11-21 13:54:11,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019081253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:11,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254470710] [2022-11-21 13:54:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:11,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:11,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:11,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:54:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:54:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:54:11,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:54:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254470710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:12,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:12,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:54:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847997912] [2022-11-21 13:54:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:12,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:54:12,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:12,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:54:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:54:12,161 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 13:54:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:12,382 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2022-11-21 13:54:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:54:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 19 [2022-11-21 13:54:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:12,386 INFO L225 Difference]: With dead ends: 74 [2022-11-21 13:54:12,386 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 13:54:12,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:54:12,391 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:12,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:54:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 13:54:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-21 13:54:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-21 13:54:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2022-11-21 13:54:12,424 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 19 [2022-11-21 13:54:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:12,425 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2022-11-21 13:54:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 13:54:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2022-11-21 13:54:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 13:54:12,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:12,434 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:12,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:54:12,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-21 13:54:12,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2022-11-21 13:54:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:12,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812410519] [2022-11-21 13:54:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:12,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:13,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:13,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:13,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-21 13:54:13,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:13,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812410519] [2022-11-21 13:54:13,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812410519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:13,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613032285] [2022-11-21 13:54:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:13,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:13,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:13,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:13,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:54:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:13,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 13:54:13,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-21 13:54:13,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-21 13:54:13,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613032285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:13,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:13,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2022-11-21 13:54:13,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705613522] [2022-11-21 13:54:13,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:13,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 13:54:13,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 13:54:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:54:13,976 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 13:54:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:14,121 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2022-11-21 13:54:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:54:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-21 13:54:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:14,132 INFO L225 Difference]: With dead ends: 120 [2022-11-21 13:54:14,133 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 13:54:14,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:54:14,136 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:14,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 81 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:54:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 13:54:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-21 13:54:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2022-11-21 13:54:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2022-11-21 13:54:14,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2022-11-21 13:54:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:14,150 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2022-11-21 13:54:14,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-21 13:54:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2022-11-21 13:54:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 13:54:14,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:14,153 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:14,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:54:14,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:14,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -749766204, now seen corresponding path program 2 times [2022-11-21 13:54:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004160412] [2022-11-21 13:54:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:14,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-21 13:54:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-21 13:54:15,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004160412] [2022-11-21 13:54:15,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004160412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:15,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408921935] [2022-11-21 13:54:15,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:54:15,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:15,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:15,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:15,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:54:15,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:54:15,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 13:54:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-21 13:54:15,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-21 13:54:17,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408921935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:17,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:17,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 29 [2022-11-21 13:54:17,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624559272] [2022-11-21 13:54:17,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:17,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 13:54:17,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 13:54:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:54:17,238 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 23 states have internal predecessors, (62), 9 states have call successors, (13), 2 states have call predecessors, (13), 12 states have return successors, (24), 15 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-21 13:54:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:17,668 INFO L93 Difference]: Finished difference Result 106 states and 183 transitions. [2022-11-21 13:54:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:54:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 23 states have internal predecessors, (62), 9 states have call successors, (13), 2 states have call predecessors, (13), 12 states have return successors, (24), 15 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2022-11-21 13:54:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:17,679 INFO L225 Difference]: With dead ends: 106 [2022-11-21 13:54:17,679 INFO L226 Difference]: Without dead ends: 58 [2022-11-21 13:54:17,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 13:54:17,681 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:17,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 198 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:54:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-21 13:54:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-11-21 13:54:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (24), 11 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-21 13:54:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-11-21 13:54:17,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 79 [2022-11-21 13:54:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:17,694 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-11-21 13:54:17,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 23 states have internal predecessors, (62), 9 states have call successors, (13), 2 states have call predecessors, (13), 12 states have return successors, (24), 15 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-21 13:54:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-11-21 13:54:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-21 13:54:17,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:17,701 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:17,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:54:17,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:17,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 373404425, now seen corresponding path program 3 times [2022-11-21 13:54:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026917792] [2022-11-21 13:54:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:18,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:18,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:18,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:54:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:54:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 435 proven. 665 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2022-11-21 13:54:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:19,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026917792] [2022-11-21 13:54:19,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026917792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:19,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14115912] [2022-11-21 13:54:19,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:54:19,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:19,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:19,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:54:19,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-21 13:54:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 13:54:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 538 proven. 48 refuted. 0 times theorem prover too weak. 1721 trivial. 0 not checked. [2022-11-21 13:54:19,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 538 proven. 55 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2022-11-21 13:54:20,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14115912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:20,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:20,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 20 [2022-11-21 13:54:20,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745857653] [2022-11-21 13:54:20,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:20,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 13:54:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 13:54:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-21 13:54:20,901 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 11 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (29), 12 states have call predecessors, (29), 11 states have call successors, (29) [2022-11-21 13:54:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:21,241 INFO L93 Difference]: Finished difference Result 133 states and 250 transitions. [2022-11-21 13:54:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 13:54:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 11 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (29), 12 states have call predecessors, (29), 11 states have call successors, (29) Word has length 210 [2022-11-21 13:54:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:21,244 INFO L225 Difference]: With dead ends: 133 [2022-11-21 13:54:21,244 INFO L226 Difference]: Without dead ends: 85 [2022-11-21 13:54:21,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 473 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:54:21,246 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:21,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 174 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:54:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-21 13:54:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2022-11-21 13:54:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2022-11-21 13:54:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2022-11-21 13:54:21,274 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 210 [2022-11-21 13:54:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:21,277 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2022-11-21 13:54:21,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 11 states have call successors, (18), 1 states have call predecessors, (18), 9 states have return successors, (29), 12 states have call predecessors, (29), 11 states have call successors, (29) [2022-11-21 13:54:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2022-11-21 13:54:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-21 13:54:21,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:21,291 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:21,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:54:21,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:21,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1538229242, now seen corresponding path program 4 times [2022-11-21 13:54:21,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:21,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824991329] [2022-11-21 13:54:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:21,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-21 13:54:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 125 proven. 275 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-21 13:54:22,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824991329] [2022-11-21 13:54:22,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824991329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:22,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24045897] [2022-11-21 13:54:22,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:54:22,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:22,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:22,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:22,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:54:22,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:54:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:22,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 13:54:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 484 proven. 71 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-21 13:54:22,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 131 proven. 269 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-21 13:54:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24045897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:24,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:24,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 27 [2022-11-21 13:54:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287466444] [2022-11-21 13:54:24,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:24,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 13:54:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 13:54:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:54:24,302 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2022-11-21 13:54:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:24,839 INFO L93 Difference]: Finished difference Result 153 states and 265 transitions. [2022-11-21 13:54:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:54:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) Word has length 131 [2022-11-21 13:54:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:24,841 INFO L225 Difference]: With dead ends: 153 [2022-11-21 13:54:24,841 INFO L226 Difference]: Without dead ends: 85 [2022-11-21 13:54:24,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 13:54:24,843 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:24,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:54:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-21 13:54:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-21 13:54:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2022-11-21 13:54:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2022-11-21 13:54:24,869 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 131 [2022-11-21 13:54:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:24,870 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2022-11-21 13:54:24,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2022-11-21 13:54:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2022-11-21 13:54:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-21 13:54:24,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:24,872 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:24,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 13:54:25,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:25,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1811622132, now seen corresponding path program 5 times [2022-11-21 13:54:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748370601] [2022-11-21 13:54:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:25,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-21 13:54:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 152 proven. 295 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-21 13:54:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748370601] [2022-11-21 13:54:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748370601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478592153] [2022-11-21 13:54:25,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:54:25,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:25,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:25,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:54:26,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 13:54:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 13:54:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-21 13:54:26,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-21 13:54:28,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478592153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:28,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:28,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2022-11-21 13:54:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620357247] [2022-11-21 13:54:28,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:28,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:54:28,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:28,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:54:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:54:28,146 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2022-11-21 13:54:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:28,633 INFO L93 Difference]: Finished difference Result 176 states and 301 transitions. [2022-11-21 13:54:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 13:54:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 131 [2022-11-21 13:54:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:28,635 INFO L225 Difference]: With dead ends: 176 [2022-11-21 13:54:28,636 INFO L226 Difference]: Without dead ends: 100 [2022-11-21 13:54:28,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 280 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 13:54:28,638 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:28,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 190 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:54:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-21 13:54:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-21 13:54:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2022-11-21 13:54:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2022-11-21 13:54:28,657 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 131 [2022-11-21 13:54:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:28,657 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2022-11-21 13:54:28,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2022-11-21 13:54:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2022-11-21 13:54:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-21 13:54:28,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:28,660 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:28,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:54:28,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 13:54:28,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 6 times [2022-11-21 13:54:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:28,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173483660] [2022-11-21 13:54:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:29,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:54:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-11-21 13:54:30,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173483660] [2022-11-21 13:54:30,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173483660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834281850] [2022-11-21 13:54:30,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 13:54:30,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:30,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:54:30,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-21 13:54:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 13:54:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2022-11-21 13:54:30,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2022-11-21 13:54:35,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834281850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:35,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:35,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2022-11-21 13:54:35,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876219129] [2022-11-21 13:54:35,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-21 13:54:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-21 13:54:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 13:54:35,260 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-21 13:54:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:36,136 INFO L93 Difference]: Finished difference Result 206 states and 359 transitions. [2022-11-21 13:54:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 13:54:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 157 [2022-11-21 13:54:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:36,146 INFO L225 Difference]: With dead ends: 206 [2022-11-21 13:54:36,146 INFO L226 Difference]: Without dead ends: 115 [2022-11-21 13:54:36,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 330 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=3361, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 13:54:36,149 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:36,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 261 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:54:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-21 13:54:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-21 13:54:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.105263157894737) internal successors, (84), 77 states have internal predecessors, (84), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2022-11-21 13:54:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2022-11-21 13:54:36,166 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2022-11-21 13:54:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:36,167 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2022-11-21 13:54:36,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-21 13:54:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2022-11-21 13:54:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-21 13:54:36,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:36,170 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:36,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-21 13:54:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:36,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 7 times [2022-11-21 13:54:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:36,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048078974] [2022-11-21 13:54:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:36,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:54:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:54:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-21 13:54:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2022-11-21 13:54:38,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048078974] [2022-11-21 13:54:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048078974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792052664] [2022-11-21 13:54:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 13:54:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:38,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:38,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:54:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-21 13:54:38,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2022-11-21 13:54:38,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2022-11-21 13:54:40,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792052664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:40,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:40,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 36 [2022-11-21 13:54:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918035852] [2022-11-21 13:54:40,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:40,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 13:54:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 13:54:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 13:54:40,863 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-21 13:54:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:43,686 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2022-11-21 13:54:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-21 13:54:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 183 [2022-11-21 13:54:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:43,692 INFO L225 Difference]: With dead ends: 237 [2022-11-21 13:54:43,692 INFO L226 Difference]: Without dead ends: 233 [2022-11-21 13:54:43,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 404 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2022-11-21 13:54:43,695 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 228 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:43,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 444 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 13:54:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-21 13:54:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 187. [2022-11-21 13:54:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 122 states have (on average 1.0819672131147542) internal successors, (132), 123 states have internal predecessors, (132), 31 states have call successors, (31), 11 states have call predecessors, (31), 33 states have return successors, (230), 52 states have call predecessors, (230), 31 states have call successors, (230) [2022-11-21 13:54:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 393 transitions. [2022-11-21 13:54:43,730 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 393 transitions. Word has length 183 [2022-11-21 13:54:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:43,731 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 393 transitions. [2022-11-21 13:54:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-21 13:54:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 393 transitions. [2022-11-21 13:54:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-21 13:54:43,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:43,734 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:43,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 13:54:43,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:43,941 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 8 times [2022-11-21 13:54:43,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:43,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126168438] [2022-11-21 13:54:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:43,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:54:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:54:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2022-11-21 13:54:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126168438] [2022-11-21 13:54:45,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126168438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:45,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453820909] [2022-11-21 13:54:45,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:54:45,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:45,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:45,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:45,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:54:45,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:54:45,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-21 13:54:45,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2022-11-21 13:54:45,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-11-21 13:54:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453820909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:50,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:50,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2022-11-21 13:54:50,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280689434] [2022-11-21 13:54:50,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 13:54:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 13:54:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 13:54:50,359 INFO L87 Difference]: Start difference. First operand 187 states and 393 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2022-11-21 13:54:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:54:51,186 INFO L93 Difference]: Finished difference Result 346 states and 797 transitions. [2022-11-21 13:54:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 13:54:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 170 [2022-11-21 13:54:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:54:51,193 INFO L225 Difference]: With dead ends: 346 [2022-11-21 13:54:51,193 INFO L226 Difference]: Without dead ends: 168 [2022-11-21 13:54:51,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 358 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=865, Invalid=3295, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 13:54:51,197 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:54:51,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 236 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:54:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-21 13:54:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-11-21 13:54:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 111 states have internal predecessors, (119), 27 states have call successors, (27), 10 states have call predecessors, (27), 30 states have return successors, (162), 46 states have call predecessors, (162), 27 states have call successors, (162) [2022-11-21 13:54:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 308 transitions. [2022-11-21 13:54:51,239 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 308 transitions. Word has length 170 [2022-11-21 13:54:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:54:51,241 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 308 transitions. [2022-11-21 13:54:51,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2022-11-21 13:54:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 308 transitions. [2022-11-21 13:54:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-21 13:54:51,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:54:51,247 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:54:51,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:54:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 13:54:51,459 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:54:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:54:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash 530318069, now seen corresponding path program 9 times [2022-11-21 13:54:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:54:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224109854] [2022-11-21 13:54:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:54:51,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:54:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:51,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:54:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:54:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:54:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:54:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:54:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:54:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:54:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:54:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-21 13:54:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-21 13:54:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:54:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 664 proven. 533 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-11-21 13:54:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:54:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224109854] [2022-11-21 13:54:53,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224109854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:54:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818439847] [2022-11-21 13:54:53,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:54:53,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:54:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:54:53,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:54:53,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:54:53,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-21 13:54:53,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:54:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 13:54:53,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:54:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-11-21 13:54:53,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:54:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2022-11-21 13:54:59,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818439847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:54:59,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:54:59,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 32] total 39 [2022-11-21 13:54:59,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567263533] [2022-11-21 13:54:59,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:54:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-21 13:54:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:54:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-21 13:54:59,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 13:54:59,297 INFO L87 Difference]: Start difference. First operand 168 states and 308 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2022-11-21 13:55:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:00,159 INFO L93 Difference]: Finished difference Result 349 states and 744 transitions. [2022-11-21 13:55:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-21 13:55:00,160 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) Word has length 196 [2022-11-21 13:55:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:00,164 INFO L225 Difference]: With dead ends: 349 [2022-11-21 13:55:00,164 INFO L226 Difference]: Without dead ends: 190 [2022-11-21 13:55:00,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 414 SyntacticMatches, 25 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=789, Invalid=3243, Unknown=0, NotChecked=0, Total=4032 [2022-11-21 13:55:00,168 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 165 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:00,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 328 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 13:55:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-21 13:55:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2022-11-21 13:55:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 114 states have internal predecessors, (121), 28 states have call successors, (28), 10 states have call predecessors, (28), 31 states have return successors, (166), 48 states have call predecessors, (166), 28 states have call successors, (166) [2022-11-21 13:55:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 315 transitions. [2022-11-21 13:55:00,194 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 315 transitions. Word has length 196 [2022-11-21 13:55:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:00,195 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 315 transitions. [2022-11-21 13:55:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2022-11-21 13:55:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 315 transitions. [2022-11-21 13:55:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-21 13:55:00,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:00,199 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:00,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:00,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:00,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash 660925528, now seen corresponding path program 10 times [2022-11-21 13:55:00,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:00,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720810205] [2022-11-21 13:55:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:00,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:55:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:00,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:55:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:55:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-21 13:55:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:55:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-21 13:55:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-21 13:55:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 267 proven. 793 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-11-21 13:55:01,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720810205] [2022-11-21 13:55:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720810205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:55:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657829045] [2022-11-21 13:55:01,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:55:01,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:01,515 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:55:01,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:55:01,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 13:55:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-11-21 13:55:02,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2022-11-21 13:55:04,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657829045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:04,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:55:04,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2022-11-21 13:55:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254154169] [2022-11-21 13:55:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:04,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 13:55:04,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 13:55:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-11-21 13:55:04,648 INFO L87 Difference]: Start difference. First operand 173 states and 315 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-21 13:55:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:05,124 INFO L93 Difference]: Finished difference Result 338 states and 689 transitions. [2022-11-21 13:55:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 13:55:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 209 [2022-11-21 13:55:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:05,128 INFO L225 Difference]: With dead ends: 338 [2022-11-21 13:55:05,129 INFO L226 Difference]: Without dead ends: 174 [2022-11-21 13:55:05,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 456 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 13:55:05,132 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 149 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:05,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 251 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 13:55:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-21 13:55:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-11-21 13:55:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 114 states have internal predecessors, (121), 28 states have call successors, (28), 10 states have call predecessors, (28), 31 states have return successors, (162), 48 states have call predecessors, (162), 28 states have call successors, (162) [2022-11-21 13:55:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 311 transitions. [2022-11-21 13:55:05,152 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 311 transitions. Word has length 209 [2022-11-21 13:55:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:05,153 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 311 transitions. [2022-11-21 13:55:05,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-21 13:55:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 311 transitions. [2022-11-21 13:55:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-21 13:55:05,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:05,158 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:05,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 13:55:05,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash 471385981, now seen corresponding path program 11 times [2022-11-21 13:55:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268631643] [2022-11-21 13:55:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:05,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:05,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:55:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:55:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 13:55:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:55:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-21 13:55:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-11-21 13:55:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:55:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-21 13:55:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-21 13:55:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 519 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2022-11-21 13:55:06,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:06,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268631643] [2022-11-21 13:55:06,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268631643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:55:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085837575] [2022-11-21 13:55:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:55:06,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:06,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:06,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:55:06,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-11-21 13:55:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-21 13:55:06,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1483 proven. 777 refuted. 0 times theorem prover too weak. 2069 trivial. 0 not checked. [2022-11-21 13:55:07,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1579 proven. 819 refuted. 0 times theorem prover too weak. 1931 trivial. 0 not checked. [2022-11-21 13:55:17,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085837575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:17,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:55:17,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 29, 40] total 49 [2022-11-21 13:55:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383204037] [2022-11-21 13:55:17,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 13:55:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 13:55:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 13:55:17,895 INFO L87 Difference]: Start difference. First operand 173 states and 311 transitions. Second operand has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 43 states have internal predecessors, (114), 26 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-11-21 13:55:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:19,892 INFO L93 Difference]: Finished difference Result 374 states and 923 transitions. [2022-11-21 13:55:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-21 13:55:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 43 states have internal predecessors, (114), 26 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) Word has length 281 [2022-11-21 13:55:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:19,898 INFO L225 Difference]: With dead ends: 374 [2022-11-21 13:55:19,898 INFO L226 Difference]: Without dead ends: 206 [2022-11-21 13:55:19,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 572 SyntacticMatches, 33 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2004, Invalid=8502, Unknown=0, NotChecked=0, Total=10506 [2022-11-21 13:55:19,904 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:19,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 458 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 13:55:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-21 13:55:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-11-21 13:55:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 39 states have call successors, (39), 17 states have call predecessors, (39), 30 states have return successors, (178), 51 states have call predecessors, (178), 39 states have call successors, (178) [2022-11-21 13:55:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 356 transitions. [2022-11-21 13:55:19,935 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 356 transitions. Word has length 281 [2022-11-21 13:55:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:19,935 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 356 transitions. [2022-11-21 13:55:19,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 43 states have internal predecessors, (114), 26 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2022-11-21 13:55:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 356 transitions. [2022-11-21 13:55:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-21 13:55:19,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:55:19,942 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 24, 19, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:55:19,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:20,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 13:55:20,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:55:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:55:20,150 INFO L85 PathProgramCache]: Analyzing trace with hash 584923035, now seen corresponding path program 12 times [2022-11-21 13:55:20,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:55:20,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952450357] [2022-11-21 13:55:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:55:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:55:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 13:55:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:20,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 13:55:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-21 13:55:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:55:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-11-21 13:55:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:21,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 13:55:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-21 13:55:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 13:55:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-21 13:55:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-21 13:55:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-21 13:55:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-21 13:55:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-21 13:55:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:55:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 604 proven. 1455 refuted. 0 times theorem prover too weak. 2471 trivial. 0 not checked. [2022-11-21 13:55:22,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:55:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952450357] [2022-11-21 13:55:22,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952450357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:55:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751363391] [2022-11-21 13:55:22,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 13:55:22,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:55:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:55:22,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:55:22,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 13:55:22,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-11-21 13:55:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:55:22,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 13:55:22,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:55:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 335 proven. 857 refuted. 0 times theorem prover too weak. 3338 trivial. 0 not checked. [2022-11-21 13:55:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:55:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 345 proven. 885 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2022-11-21 13:55:25,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751363391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:55:25,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:55:25,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8, 11] total 36 [2022-11-21 13:55:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905297074] [2022-11-21 13:55:25,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:55:25,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 13:55:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:55:25,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 13:55:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 13:55:25,043 INFO L87 Difference]: Start difference. First operand 205 states and 356 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 31 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 17 states have return successors, (40), 23 states have call predecessors, (40), 18 states have call successors, (40) [2022-11-21 13:55:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:55:27,518 INFO L93 Difference]: Finished difference Result 397 states and 794 transitions. [2022-11-21 13:55:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-21 13:55:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 31 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 17 states have return successors, (40), 23 states have call predecessors, (40), 18 states have call successors, (40) Word has length 288 [2022-11-21 13:55:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:55:27,520 INFO L225 Difference]: With dead ends: 397 [2022-11-21 13:55:27,520 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 13:55:27,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 648 SyntacticMatches, 8 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2298, Invalid=9692, Unknown=0, NotChecked=0, Total=11990 [2022-11-21 13:55:27,527 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 186 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:55:27,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 209 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 13:55:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 13:55:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 13:55:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 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 13:55:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 13:55:27,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 288 [2022-11-21 13:55:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:55:27,529 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 13:55:27,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 31 states have internal predecessors, (89), 18 states have call successors, (26), 1 states have call predecessors, (26), 17 states have return successors, (40), 23 states have call predecessors, (40), 18 states have call successors, (40) [2022-11-21 13:55:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 13:55:27,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 13:55:27,533 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 13:55:27,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 13:55:27,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 13:55:27,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-21 13:55:32,836 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-21 13:55:32,836 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-21 13:55:32,836 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-21 13:55:32,836 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2022-11-21 13:55:32,836 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-21 13:55:32,836 INFO L902 garLoopResultBuilder]: At program point L27(lines 27 47) the Hoare annotation is: true [2022-11-21 13:55:32,837 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2022-11-21 13:55:32,837 INFO L899 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2022-11-21 13:55:32,837 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2022-11-21 13:55:32,837 INFO L902 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: true [2022-11-21 13:55:32,837 INFO L899 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2022-11-21 13:55:32,837 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2022-11-21 13:55:32,837 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2022-11-21 13:55:32,837 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (or (not (<= 1 |ackermann_#in~n|)) (not (= |ackermann_#in~m| 0)) (not (< |ackermann_#in~n| 2))) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2022-11-21 13:55:32,838 INFO L899 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2022-11-21 13:55:32,838 INFO L902 garLoopResultBuilder]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2022-11-21 13:55:32,838 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2022-11-21 13:55:32,838 INFO L895 garLoopResultBuilder]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse11 (<= 3 |ackermann_#t~ret5|)) (.cse7 (<= 5 |ackermann_#t~ret5|)) (.cse8 (<= |ackermann_#t~ret5| 5)) (.cse16 (<= 2 ackermann_~m)) (.cse10 (<= |ackermann_#in~n| 2)) (.cse17 (<= ackermann_~m 2)) (.cse4 (<= 2 |ackermann_#in~n|)) (.cse3 (= ackermann_~n |ackermann_#in~n|)) (.cse20 (<= 1 |ackermann_#in~n|)) (.cse14 (<= 1 |ackermann_#in~m|)) (.cse5 (= ackermann_~m |ackermann_#in~m|)) (.cse19 (<= |ackermann_#in~n| 1))) (let ((.cse2 (<= 7 |ackermann_#t~ret5|)) (.cse6 (and (<= |ackermann_#t~ret5| 2) .cse3 (<= 2 |ackermann_#t~ret5|) .cse20 .cse14 .cse5 .cse19)) (.cse15 (= |ackermann_#in~m| 0)) (.cse12 (<= |ackermann_#t~ret5| 3)) (.cse0 (and .cse7 .cse8 .cse16 .cse10 .cse3 .cse17 .cse4 .cse5)) (.cse13 (<= 3 |ackermann_#in~n|)) (.cse18 (<= 3 |ackermann_#in~m|)) (.cse9 (<= |ackermann_#in~m| 1)) (.cse1 (and .cse16 .cse11 .cse3 .cse20 .cse5 .cse19))) (and (or .cse0 (not (<= 2 |ackermann_#in~m|)) .cse1 (and .cse2 .cse3 .cse4 .cse5)) (or .cse6 (and .cse7 .cse8 .cse3 (<= 4 |ackermann_#in~n|) .cse5 (<= |ackermann_#in~n| 4)) (not .cse9) (and .cse10 .cse11 .cse3 .cse5 .cse12) (and (<= |ackermann_#in~n| 3) (<= |ackermann_#t~ret5| 4) .cse3 .cse13 .cse5 (<= 4 |ackermann_#t~ret5|)) (not .cse14) (and (<= 6 |ackermann_#t~ret5|) .cse3 (<= |ackermann_#t~ret5| 6) .cse5 (<= 5 |ackermann_#in~n|) (<= |ackermann_#in~n| 5)) (and .cse2 .cse3 .cse5 (<= 6 |ackermann_#in~n|))) (or (not (<= |ackermann_#in~m| 0)) (and .cse15 .cse3 .cse5)) (or .cse6 .cse15 (and .cse16 .cse17 .cse12) (and .cse7 .cse18) (not .cse19)) (or .cse0 .cse13 .cse18 .cse9 .cse1)))) [2022-11-21 13:55:32,838 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2022-11-21 13:55:32,844 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2022-11-21 13:55:32,845 INFO L899 garLoopResultBuilder]: For program point L23-3(line 23) no Hoare annotation was computed. [2022-11-21 13:55:32,845 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2022-11-21 13:55:32,845 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2022-11-21 13:55:32,849 INFO L444 BasicCegarLoop]: Path program histogram: [12, 1, 1] [2022-11-21 13:55:32,851 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 13:55:32,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:55:32 BoogieIcfgContainer [2022-11-21 13:55:32,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 13:55:32,868 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 13:55:32,868 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 13:55:32,868 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 13:55:32,869 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:54:10" (3/4) ... [2022-11-21 13:55:32,872 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-21 13:55:32,881 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2022-11-21 13:55:32,887 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-21 13:55:32,887 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-21 13:55:32,887 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-21 13:55:32,887 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-21 13:55:32,927 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 13:55:32,927 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 13:55:32,928 INFO L158 Benchmark]: Toolchain (without parser) took 82882.33ms. Allocated memory was 136.3MB in the beginning and 750.8MB in the end (delta: 614.5MB). Free memory was 105.6MB in the beginning and 671.0MB in the end (delta: -565.4MB). Peak memory consumption was 50.1MB. Max. memory is 16.1GB. [2022-11-21 13:55:32,928 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 109.1MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:55:32,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.79ms. Allocated memory is still 136.3MB. Free memory was 105.6MB in the beginning and 95.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 13:55:32,929 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.85ms. Allocated memory is still 136.3MB. Free memory was 95.6MB in the beginning and 94.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:55:32,929 INFO L158 Benchmark]: Boogie Preprocessor took 16.50ms. Allocated memory is still 136.3MB. Free memory was 94.1MB in the beginning and 93.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 13:55:32,930 INFO L158 Benchmark]: RCFGBuilder took 403.26ms. Allocated memory is still 136.3MB. Free memory was 93.0MB in the beginning and 82.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 13:55:32,930 INFO L158 Benchmark]: TraceAbstraction took 82132.96ms. Allocated memory was 136.3MB in the beginning and 750.8MB in the end (delta: 614.5MB). Free memory was 82.0MB in the beginning and 674.1MB in the end (delta: -592.2MB). Peak memory consumption was 438.1MB. Max. memory is 16.1GB. [2022-11-21 13:55:32,931 INFO L158 Benchmark]: Witness Printer took 59.43ms. Allocated memory is still 750.8MB. Free memory was 674.1MB in the beginning and 671.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 13:55:32,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 109.1MB. Free memory is still 62.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.79ms. Allocated memory is still 136.3MB. Free memory was 105.6MB in the beginning and 95.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.85ms. Allocated memory is still 136.3MB. Free memory was 95.6MB in the beginning and 94.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.50ms. Allocated memory is still 136.3MB. Free memory was 94.1MB in the beginning and 93.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 403.26ms. Allocated memory is still 136.3MB. Free memory was 93.0MB in the beginning and 82.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 82132.96ms. Allocated memory was 136.3MB in the beginning and 750.8MB in the end (delta: 614.5MB). Free memory was 82.0MB in the beginning and 674.1MB in the end (delta: -592.2MB). Peak memory consumption was 438.1MB. Max. memory is 16.1GB. * Witness Printer took 59.43ms. Allocated memory is still 750.8MB. Free memory was 674.1MB in the beginning and 671.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 82.0s, OverallIterations: 14, TraceHistogramMax: 43, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.1s, AutomataDifference: 12.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1342 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1269 mSDsluCounter, 3201 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2811 mSDsCounter, 2156 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8752 IncrementalHoareTripleChecker+Invalid, 10908 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2156 mSolverCounterUnsat, 390 mSDtfsCounter, 8752 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5372 GetRequests, 4524 SyntacticMatches, 161 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12521 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=13, InterpolantAutomatonStates: 407, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 78 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 1046 PreInvPairs, 3134 NumberOfFragments, 329 HoareAnnotationTreeSize, 1046 FomulaSimplifications, 22305 FormulaSimplificationTreeSizeReduction, 1.9s HoareSimplificationTime, 6 FomulaSimplificationsInter, 23835 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 56.6s InterpolantComputationTime, 4210 NumberOfCodeBlocks, 4045 NumberOfCodeBlocksAsserted, 129 NumberOfCheckSat, 6269 ConstructedInterpolants, 0 QuantifiedInterpolants, 12331 SizeOfPredicates, 106 NumberOfNonLiveVariables, 5937 ConjunctsInSsa, 367 ConjunctsInUnsatCore, 40 InterpolantComputations, 1 PerfectInterpolantSequences, 52391/65946 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-21 13:55:32,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e95177e-32b5-4a3f-8c94-7be5f1350fff/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE