./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y --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 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:45:25,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:45:25,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:45:25,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:45:25,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:45:25,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:45:25,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:45:25,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:45:25,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:45:25,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:45:25,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:45:25,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:45:25,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:45:25,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:45:25,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:45:25,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:45:25,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:45:25,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:45:25,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:45:25,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:45:25,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:45:25,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:45:25,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:45:25,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:45:25,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:45:25,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:45:25,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:45:25,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:45:25,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:45:25,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:45:25,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:45:25,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:45:25,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:45:25,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:45:25,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:45:25,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:45:25,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:45:25,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:45:25,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:45:25,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:45:25,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:45:25,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:45:25,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:45:25,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:45:25,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:45:25,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:45:25,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:45:25,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:45:25,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:45:25,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:45:25,468 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:45:25,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:45:25,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:45:25,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:45:25,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:45:25,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:45:25,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:45:25,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:45:25,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:45:25,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:45:25,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:45:25,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:45:25,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:45:25,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:45:25,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:45:25,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:45:25,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:25,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:45:25,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:45:25,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:45:25,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:45:25,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:45:25,479 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:45:25,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:45:25,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:45:25,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:45:25,480 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_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 [2021-11-13 18:45:25,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:45:25,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:45:25,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:45:25,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:45:25,940 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:45:25,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-11-13 18:45:26,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/02561105d/17149661e297431d8daa110320bef389/FLAGa7760c0bf [2021-11-13 18:45:26,746 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:45:26,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-11-13 18:45:26,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/02561105d/17149661e297431d8daa110320bef389/FLAGa7760c0bf [2021-11-13 18:45:27,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/02561105d/17149661e297431d8daa110320bef389 [2021-11-13 18:45:27,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:45:27,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:45:27,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:27,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:45:27,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:45:27,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50fece93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27, skipping insertion in model container [2021-11-13 18:45:27,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:45:27,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:45:27,438 WARN L228 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_f7da4b7a-ba48-4778-8de6-87aa78ca4274/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-11-13 18:45:27,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:27,454 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:45:27,474 WARN L228 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_f7da4b7a-ba48-4778-8de6-87aa78ca4274/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-11-13 18:45:27,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:27,491 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:45:27,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27 WrapperNode [2021-11-13 18:45:27,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:27,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:27,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:45:27,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:45:27,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:45:27,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:45:27,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:45:27,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:45:27,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:45:27,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:45:27,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:45:27,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:45:27,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (1/1) ... [2021-11-13 18:45:27,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:27,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:45:27,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:45:27,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:45:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-11-13 18:45:27,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-11-13 18:45:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:45:27,656 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-11-13 18:45:27,656 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-11-13 18:45:27,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:45:27,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:45:27,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:45:27,904 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:45:27,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:27 BoogieIcfgContainer [2021-11-13 18:45:27,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:45:27,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:45:27,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:45:27,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:45:27,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:45:27" (1/3) ... [2021-11-13 18:45:27,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d74986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:27, skipping insertion in model container [2021-11-13 18:45:27,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:27" (2/3) ... [2021-11-13 18:45:27,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d74986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:27, skipping insertion in model container [2021-11-13 18:45:27,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:27" (3/3) ... [2021-11-13 18:45:27,918 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2021-11-13 18:45:27,925 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:45:27,925 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:45:27,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:45:27,996 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:45:27,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:45:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:45:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:45:28,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:28,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:28,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-11-13 18:45:28,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:28,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605235019] [2021-11-13 18:45:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:28,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:28,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:28,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605235019] [2021-11-13 18:45:28,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605235019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:28,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:28,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:45:28,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897125299] [2021-11-13 18:45:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:28,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:45:28,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:45:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:28,392 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-13 18:45:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:28,453 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-11-13 18:45:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:45:28,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2021-11-13 18:45:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:28,468 INFO L225 Difference]: With dead ends: 43 [2021-11-13 18:45:28,469 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 18:45:28,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:28,478 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:28,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 5.22ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 21.41ms Time] [2021-11-13 18:45:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 18:45:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-13 18:45:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 18:45:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-13 18:45:28,607 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-11-13 18:45:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-13 18:45:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-13 18:45:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-13 18:45:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:45:28,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:28,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:28,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:45:28,612 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-11-13 18:45:28,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:28,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752920138] [2021-11-13 18:45:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:28,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:28,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:28,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:28,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752920138] [2021-11-13 18:45:28,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752920138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:28,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:28,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:45:28,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108761729] [2021-11-13 18:45:28,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:28,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:45:28,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:45:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:28,773 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-13 18:45:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:28,797 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-13 18:45:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:45:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2021-11-13 18:45:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:28,800 INFO L225 Difference]: With dead ends: 33 [2021-11-13 18:45:28,801 INFO L226 Difference]: Without dead ends: 29 [2021-11-13 18:45:28,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:28,804 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:28,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 13.05ms Time] [2021-11-13 18:45:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-13 18:45:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-13 18:45:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 18:45:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-13 18:45:28,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-11-13 18:45:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:28,817 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-13 18:45:28,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-13 18:45:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-13 18:45:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:45:28,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:28,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:28,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:45:28,820 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-11-13 18:45:28,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:28,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285562261] [2021-11-13 18:45:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:28,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:29,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:29,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:29,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285562261] [2021-11-13 18:45:29,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285562261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:29,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254396104] [2021-11-13 18:45:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:29,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:29,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:29,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:29,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:45:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:45:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:29,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:29,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254396104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:29,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:29,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-13 18:45:29,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532466209] [2021-11-13 18:45:29,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:29,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:45:29,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:45:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:45:29,834 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:45:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:30,157 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-11-13 18:45:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:45:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-11-13 18:45:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:30,166 INFO L225 Difference]: With dead ends: 55 [2021-11-13 18:45:30,166 INFO L226 Difference]: Without dead ends: 31 [2021-11-13 18:45:30,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:45:30,180 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.00ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:30,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 143 Unknown, 0 Unchecked, 15.00ms Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 175.36ms Time] [2021-11-13 18:45:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-13 18:45:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-13 18:45:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-13 18:45:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-13 18:45:30,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-11-13 18:45:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:30,199 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-13 18:45:30,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:45:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-13 18:45:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:45:30,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:30,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:30,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:30,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:30,428 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-11-13 18:45:30,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:30,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004727929] [2021-11-13 18:45:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:30,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:30,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:30,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:30,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:30,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:30,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004727929] [2021-11-13 18:45:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004727929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871512160] [2021-11-13 18:45:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:30,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:30,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:30,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:45:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:30,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:45:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:30,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:31,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871512160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:31,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:31,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-11-13 18:45:31,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442899103] [2021-11-13 18:45:31,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:31,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:45:31,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:45:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:45:31,092 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 18:45:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:31,318 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-11-13 18:45:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:45:31,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-11-13 18:45:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:31,331 INFO L225 Difference]: With dead ends: 51 [2021-11-13 18:45:31,331 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 18:45:31,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:45:31,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.71ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:31,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 194 Unknown, 0 Unchecked, 7.71ms Time], IncrementalHoareTripleChecker [23 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 170.26ms Time] [2021-11-13 18:45:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 18:45:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-11-13 18:45:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 18:45:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-11-13 18:45:31,361 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-11-13 18:45:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:31,362 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-11-13 18:45:31,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 18:45:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-11-13 18:45:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:45:31,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:31,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:31,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:31,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-11-13 18:45:31,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:31,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516297794] [2021-11-13 18:45:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:31,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 18:45:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:45:31,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:31,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516297794] [2021-11-13 18:45:31,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516297794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:31,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796084310] [2021-11-13 18:45:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:31,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:31,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:31,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:45:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:45:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:45:32,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:45:32,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796084310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:32,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:32,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-11-13 18:45:32,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840022628] [2021-11-13 18:45:32,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:32,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:45:32,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:45:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:45:32,526 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-13 18:45:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:32,828 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-11-13 18:45:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:45:32,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-11-13 18:45:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:32,836 INFO L225 Difference]: With dead ends: 105 [2021-11-13 18:45:32,837 INFO L226 Difference]: Without dead ends: 63 [2021-11-13 18:45:32,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:45:32,845 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:32,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 118 Invalid, 220 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [50 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 182.49ms Time] [2021-11-13 18:45:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-13 18:45:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-13 18:45:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-13 18:45:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-11-13 18:45:32,891 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-11-13 18:45:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:32,892 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-11-13 18:45:32,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-13 18:45:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-11-13 18:45:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 18:45:32,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:32,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:32,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:33,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:33,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-11-13 18:45:33,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:33,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030452074] [2021-11-13 18:45:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:33,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:45:33,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:33,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030452074] [2021-11-13 18:45:33,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030452074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:33,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358879549] [2021-11-13 18:45:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:33,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:33,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:33,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:33,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:45:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:45:33,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:45:33,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:45:34,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358879549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:34,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:34,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2021-11-13 18:45:34,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629596012] [2021-11-13 18:45:34,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:34,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:45:34,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:45:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:45:34,040 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-13 18:45:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:34,532 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-11-13 18:45:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:45:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2021-11-13 18:45:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:34,543 INFO L225 Difference]: With dead ends: 177 [2021-11-13 18:45:34,543 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 18:45:34,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:45:34,547 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.64ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:34,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 276 Invalid, 475 Unknown, 0 Unchecked, 7.64ms Time], IncrementalHoareTripleChecker [73 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 339.24ms Time] [2021-11-13 18:45:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 18:45:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-11-13 18:45:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-11-13 18:45:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-11-13 18:45:34,600 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-11-13 18:45:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:34,601 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-11-13 18:45:34,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-13 18:45:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-11-13 18:45:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:45:34,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:34,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:34,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:34,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:34,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-11-13 18:45:34,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:34,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571844309] [2021-11-13 18:45:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:34,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:34,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:34,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:45:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:45:35,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:35,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571844309] [2021-11-13 18:45:35,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571844309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:35,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305104493] [2021-11-13 18:45:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:35,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:35,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:35,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:45:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:45:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 18:45:35,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:45:36,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305104493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:36,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:36,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 20 [2021-11-13 18:45:36,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469367879] [2021-11-13 18:45:36,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:36,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:45:36,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:45:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:45:36,181 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-13 18:45:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:36,794 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2021-11-13 18:45:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:45:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) Word has length 51 [2021-11-13 18:45:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:36,804 INFO L225 Difference]: With dead ends: 255 [2021-11-13 18:45:36,804 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 18:45:36,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:45:36,808 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 357.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.92ms SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 429.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:36,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 280 Invalid, 600 Unknown, 0 Unchecked, 8.92ms Time], IncrementalHoareTripleChecker [121 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 429.56ms Time] [2021-11-13 18:45:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 18:45:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-11-13 18:45:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2021-11-13 18:45:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2021-11-13 18:45:36,870 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2021-11-13 18:45:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:36,870 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2021-11-13 18:45:36,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-13 18:45:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2021-11-13 18:45:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 18:45:36,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:36,877 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:36,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:37,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:37,104 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2021-11-13 18:45:37,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:37,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366556637] [2021-11-13 18:45:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:37,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:45:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-13 18:45:37,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:37,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366556637] [2021-11-13 18:45:37,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366556637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:37,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593700189] [2021-11-13 18:45:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:37,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:37,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:37,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:45:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:45:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:45:37,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 18:45:38,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593700189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:38,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 24 [2021-11-13 18:45:38,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208241614] [2021-11-13 18:45:38,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:38,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:45:38,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:45:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:45:38,988 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-13 18:45:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:39,661 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2021-11-13 18:45:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:45:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) Word has length 93 [2021-11-13 18:45:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:39,664 INFO L225 Difference]: With dead ends: 240 [2021-11-13 18:45:39,664 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 18:45:39,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:45:39,669 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 111 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 379.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.64ms SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 450.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:39,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 270 Invalid, 615 Unknown, 0 Unchecked, 8.64ms Time], IncrementalHoareTripleChecker [127 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 450.31ms Time] [2021-11-13 18:45:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 18:45:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-11-13 18:45:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (35), 17 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-13 18:45:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2021-11-13 18:45:39,694 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 93 [2021-11-13 18:45:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:39,695 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2021-11-13 18:45:39,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-13 18:45:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2021-11-13 18:45:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 18:45:39,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:39,706 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:39,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:39,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:45:39,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1129417830, now seen corresponding path program 1 times [2021-11-13 18:45:39,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:39,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862425579] [2021-11-13 18:45:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:39,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-13 18:45:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:45:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 73 proven. 135 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-11-13 18:45:40,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:40,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862425579] [2021-11-13 18:45:40,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862425579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:40,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255259494] [2021-11-13 18:45:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:40,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:40,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:40,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:40,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:45:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:40,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:45:40,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 36 proven. 211 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-13 18:45:40,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 36 proven. 227 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-13 18:45:42,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255259494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:42,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:42,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 26 [2021-11-13 18:45:42,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148973264] [2021-11-13 18:45:42,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:42,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:45:42,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:45:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:45:42,542 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) [2021-11-13 18:45:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:43,207 INFO L93 Difference]: Finished difference Result 214 states and 372 transitions. [2021-11-13 18:45:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:45:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) Word has length 148 [2021-11-13 18:45:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:43,212 INFO L225 Difference]: With dead ends: 214 [2021-11-13 18:45:43,212 INFO L226 Difference]: Without dead ends: 134 [2021-11-13 18:45:43,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:45:43,216 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 108 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 348.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.95ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 423.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:43,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 313 Invalid, 680 Unknown, 0 Unchecked, 7.95ms Time], IncrementalHoareTripleChecker [129 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 423.09ms Time] [2021-11-13 18:45:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-13 18:45:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2021-11-13 18:45:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 78 states have internal predecessors, (93), 20 states have call successors, (20), 11 states have call predecessors, (20), 16 states have return successors, (56), 24 states have call predecessors, (56), 20 states have call successors, (56) [2021-11-13 18:45:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2021-11-13 18:45:43,233 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 148 [2021-11-13 18:45:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:43,233 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2021-11-13 18:45:43,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) [2021-11-13 18:45:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2021-11-13 18:45:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-13 18:45:43,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:43,240 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 16, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:43,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:43,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:43,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:43,457 INFO L85 PathProgramCache]: Analyzing trace with hash -399650163, now seen corresponding path program 2 times [2021-11-13 18:45:43,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:43,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810550264] [2021-11-13 18:45:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:43,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:45:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-13 18:45:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:45:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 169 proven. 360 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2021-11-13 18:45:44,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:44,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810550264] [2021-11-13 18:45:44,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810550264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:44,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77192295] [2021-11-13 18:45:44,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:45:44,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:44,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:44,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:44,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:45:44,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:45:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:45:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 79 proven. 543 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-11-13 18:45:45,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 79 proven. 567 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2021-11-13 18:45:47,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77192295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:47,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:47,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 27 [2021-11-13 18:45:47,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156610755] [2021-11-13 18:45:47,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:47,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:45:47,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:45:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:45:47,708 INFO L87 Difference]: Start difference. First operand 114 states and 169 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 14 states have call predecessors, (36), 21 states have call successors, (36) [2021-11-13 18:45:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:48,435 INFO L93 Difference]: Finished difference Result 260 states and 447 transitions. [2021-11-13 18:45:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:45:48,436 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 14 states have call predecessors, (36), 21 states have call successors, (36) Word has length 271 [2021-11-13 18:45:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:48,439 INFO L225 Difference]: With dead ends: 260 [2021-11-13 18:45:48,439 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 18:45:48,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 605 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:45:48,442 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 373.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.82ms SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 450.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:48,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 354 Invalid, 839 Unknown, 0 Unchecked, 7.82ms Time], IncrementalHoareTripleChecker [162 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 450.48ms Time] [2021-11-13 18:45:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 18:45:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-11-13 18:45:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 99 states have internal predecessors, (125), 26 states have call successors, (26), 18 states have call predecessors, (26), 17 states have return successors, (73), 27 states have call predecessors, (73), 26 states have call successors, (73) [2021-11-13 18:45:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 224 transitions. [2021-11-13 18:45:48,456 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 224 transitions. Word has length 271 [2021-11-13 18:45:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 224 transitions. [2021-11-13 18:45:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 14 states have call predecessors, (36), 21 states have call successors, (36) [2021-11-13 18:45:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 224 transitions. [2021-11-13 18:45:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-11-13 18:45:48,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:48,467 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 25, 23, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 12, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:48,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:48,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:45:48,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1123052726, now seen corresponding path program 3 times [2021-11-13 18:45:48,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:48,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054307319] [2021-11-13 18:45:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:48,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:45:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:45:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2021-11-13 18:45:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 18:45:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 264 proven. 626 refuted. 0 times theorem prover too weak. 3539 trivial. 0 not checked. [2021-11-13 18:45:49,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:49,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054307319] [2021-11-13 18:45:49,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054307319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:49,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971817935] [2021-11-13 18:45:49,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:45:49,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:49,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:49,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:49,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:45:49,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:45:49,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:49,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:45:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 434 proven. 4 refuted. 0 times theorem prover too weak. 3991 trivial. 0 not checked. [2021-11-13 18:45:50,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 434 proven. 4 refuted. 0 times theorem prover too weak. 3991 trivial. 0 not checked. [2021-11-13 18:45:52,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971817935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:52,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:52,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2021-11-13 18:45:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066674738] [2021-11-13 18:45:52,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:52,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:45:52,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:45:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:45:52,627 INFO L87 Difference]: Start difference. First operand 145 states and 224 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 8 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-13 18:45:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:52,883 INFO L93 Difference]: Finished difference Result 283 states and 457 transitions. [2021-11-13 18:45:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:45:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 8 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 394 [2021-11-13 18:45:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:52,887 INFO L225 Difference]: With dead ends: 283 [2021-11-13 18:45:52,888 INFO L226 Difference]: Without dead ends: 147 [2021-11-13 18:45:52,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 896 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:45:52,891 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:52,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 199 Invalid, 296 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [45 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 181.82ms Time] [2021-11-13 18:45:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-13 18:45:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-11-13 18:45:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 101 states have (on average 1.198019801980198) internal successors, (121), 98 states have internal predecessors, (121), 26 states have call successors, (26), 19 states have call predecessors, (26), 16 states have return successors, (66), 26 states have call predecessors, (66), 26 states have call successors, (66) [2021-11-13 18:45:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 213 transitions. [2021-11-13 18:45:52,911 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 213 transitions. Word has length 394 [2021-11-13 18:45:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:52,913 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 213 transitions. [2021-11-13 18:45:52,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 8 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-13 18:45:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 213 transitions. [2021-11-13 18:45:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-13 18:45:52,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:52,928 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 36, 36, 33, 31, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 18, 18, 15, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:52,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:53,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:45:53,144 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2090861273, now seen corresponding path program 4 times [2021-11-13 18:45:53,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:53,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869451166] [2021-11-13 18:45:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:53,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 18:45:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-13 18:45:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 18:45:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2021-11-13 18:45:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:45:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:45:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:45:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:45:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:45:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8577 backedges. 1090 proven. 942 refuted. 0 times theorem prover too weak. 6545 trivial. 0 not checked. [2021-11-13 18:45:55,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:55,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869451166] [2021-11-13 18:45:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869451166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:55,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325686408] [2021-11-13 18:45:55,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:45:55,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:55,183 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:55,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:45:55,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:45:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:45:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8577 backedges. 490 proven. 1080 refuted. 0 times theorem prover too weak. 7007 trivial. 0 not checked. [2021-11-13 18:45:56,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8577 backedges. 492 proven. 1108 refuted. 0 times theorem prover too weak. 6977 trivial. 0 not checked. [2021-11-13 18:46:01,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325686408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:01,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:01,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 19] total 42 [2021-11-13 18:46:01,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412066683] [2021-11-13 18:46:01,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-13 18:46:01,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-13 18:46:01,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:46:01,057 INFO L87 Difference]: Start difference. First operand 144 states and 213 transitions. Second operand has 42 states, 40 states have (on average 2.8) internal successors, (112), 42 states have internal predecessors, (112), 29 states have call successors, (36), 1 states have call predecessors, (36), 18 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2021-11-13 18:46:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:02,583 INFO L93 Difference]: Finished difference Result 355 states and 619 transitions. [2021-11-13 18:46:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-13 18:46:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.8) internal successors, (112), 42 states have internal predecessors, (112), 29 states have call successors, (36), 1 states have call predecessors, (36), 18 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) Word has length 542 [2021-11-13 18:46:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:02,589 INFO L225 Difference]: With dead ends: 355 [2021-11-13 18:46:02,590 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 18:46:02,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1222 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 18:46:02,596 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 173 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 869.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.18ms SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1054.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:02,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 648 Invalid, 1709 Unknown, 0 Unchecked, 15.18ms Time], IncrementalHoareTripleChecker [307 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1054.40ms Time] [2021-11-13 18:46:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 18:46:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 155. [2021-11-13 18:46:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 109 states have (on average 1.091743119266055) internal successors, (119), 106 states have internal predecessors, (119), 29 states have call successors, (29), 22 states have call predecessors, (29), 16 states have return successors, (42), 26 states have call predecessors, (42), 29 states have call successors, (42) [2021-11-13 18:46:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2021-11-13 18:46:02,613 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 542 [2021-11-13 18:46:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:02,614 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2021-11-13 18:46:02,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.8) internal successors, (112), 42 states have internal predecessors, (112), 29 states have call successors, (36), 1 states have call predecessors, (36), 18 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2021-11-13 18:46:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2021-11-13 18:46:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-13 18:46:02,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:02,626 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:02,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:02,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:02,848 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1387676979, now seen corresponding path program 5 times [2021-11-13 18:46:02,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:02,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138472153] [2021-11-13 18:46:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:02,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:46:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:46:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 18:46:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:46:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-13 18:46:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:46:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:46:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2021-11-13 18:46:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 18:46:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 18:46:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 18:46:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:46:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-13 18:46:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:46:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 1060 proven. 718 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2021-11-13 18:46:04,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:04,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138472153] [2021-11-13 18:46:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138472153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:04,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963764794] [2021-11-13 18:46:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:46:04,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:04,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:04,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:46:04,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-13 18:46:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:04,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:46:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 918 proven. 135 refuted. 0 times theorem prover too weak. 4316 trivial. 0 not checked. [2021-11-13 18:46:05,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 920 proven. 137 refuted. 0 times theorem prover too weak. 4312 trivial. 0 not checked. [2021-11-13 18:46:08,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963764794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:08,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:08,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13, 15] total 41 [2021-11-13 18:46:08,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229394519] [2021-11-13 18:46:08,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:46:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:46:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:46:08,164 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 states have internal predecessors, (111), 23 states have call successors, (35), 1 states have call predecessors, (35), 16 states have return successors, (45), 29 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-13 18:46:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:09,067 INFO L93 Difference]: Finished difference Result 333 states and 423 transitions. [2021-11-13 18:46:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:46:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 states have internal predecessors, (111), 23 states have call successors, (35), 1 states have call predecessors, (35), 16 states have return successors, (45), 29 states have call predecessors, (45), 23 states have call successors, (45) Word has length 433 [2021-11-13 18:46:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:09,075 INFO L225 Difference]: With dead ends: 333 [2021-11-13 18:46:09,075 INFO L226 Difference]: Without dead ends: 185 [2021-11-13 18:46:09,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 977 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=2446, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 18:46:09,080 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 491.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.87ms SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 607.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:09,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 689 Invalid, 1009 Unknown, 0 Unchecked, 7.87ms Time], IncrementalHoareTripleChecker [175 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 607.96ms Time] [2021-11-13 18:46:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-13 18:46:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 159. [2021-11-13 18:46:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 110 states have internal predecessors, (118), 30 states have call successors, (30), 23 states have call predecessors, (30), 16 states have return successors, (41), 25 states have call predecessors, (41), 30 states have call successors, (41) [2021-11-13 18:46:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2021-11-13 18:46:09,103 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 433 [2021-11-13 18:46:09,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:09,107 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2021-11-13 18:46:09,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 states have internal predecessors, (111), 23 states have call successors, (35), 1 states have call predecessors, (35), 16 states have return successors, (45), 29 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-13 18:46:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2021-11-13 18:46:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-13 18:46:09,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:09,121 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:09,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:09,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:46:09,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:09,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1402769443, now seen corresponding path program 6 times [2021-11-13 18:46:09,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:09,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6161044] [2021-11-13 18:46:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:09,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:46:09,428 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:46:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:46:09,722 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:46:09,723 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:46:09,725 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:46:09,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:46:09,733 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:09,740 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:46:09,834 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:46:09,837 INFO L158 Benchmark]: Toolchain (without parser) took 42697.00ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 72.4MB in the beginning and 253.8MB in the end (delta: -181.4MB). Peak memory consumption was 182.2MB. Max. memory is 16.1GB. [2021-11-13 18:46:09,838 INFO L158 Benchmark]: CDTParser took 0.44ms. Allocated memory is still 104.9MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:09,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.85ms. Allocated memory is still 104.9MB. Free memory was 72.2MB in the beginning and 80.9MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:46:09,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.84ms. Allocated memory is still 104.9MB. Free memory was 80.9MB in the beginning and 79.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:46:09,839 INFO L158 Benchmark]: Boogie Preprocessor took 24.05ms. Allocated memory is still 104.9MB. Free memory was 79.6MB in the beginning and 78.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:09,840 INFO L158 Benchmark]: RCFGBuilder took 343.98ms. Allocated memory is still 104.9MB. Free memory was 78.5MB in the beginning and 69.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:46:09,841 INFO L158 Benchmark]: TraceAbstraction took 41927.59ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 68.8MB in the beginning and 253.8MB in the end (delta: -185.0MB). Peak memory consumption was 181.0MB. Max. memory is 16.1GB. [2021-11-13 18:46:09,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44ms. Allocated memory is still 104.9MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.85ms. Allocated memory is still 104.9MB. Free memory was 72.2MB in the beginning and 80.9MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.84ms. Allocated memory is still 104.9MB. Free memory was 80.9MB in the beginning and 79.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.05ms. Allocated memory is still 104.9MB. Free memory was 79.6MB in the beginning and 78.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 343.98ms. Allocated memory is still 104.9MB. Free memory was 78.5MB in the beginning and 69.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 41927.59ms. Allocated memory was 104.9MB in the beginning and 318.8MB in the end (delta: 213.9MB). Free memory was 68.8MB in the beginning and 253.8MB in the end (delta: -185.0MB). Peak memory consumption was 181.0MB. 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:46:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y --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 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:46:12,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:46:12,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:46:12,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:46:12,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:46:12,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:46:12,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:46:12,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:46:12,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:46:12,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:46:12,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:46:12,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:46:12,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:46:12,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:46:12,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:46:12,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:46:12,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:46:12,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:46:12,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:46:12,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:46:12,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:46:12,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:46:12,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:46:12,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:46:12,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:46:12,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:46:12,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:46:12,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:46:12,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:46:12,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:46:12,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:46:12,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:46:12,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:46:12,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:46:12,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:46:12,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:46:12,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:46:12,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:46:12,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:46:12,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:46:12,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:46:12,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:46:13,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:46:13,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:46:13,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:46:13,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:46:13,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:46:13,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:46:13,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:46:13,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:46:13,033 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:46:13,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:46:13,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:46:13,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:46:13,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:46:13,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:46:13,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:46:13,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:46:13,036 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:46:13,036 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:46:13,036 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:46:13,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:46:13,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:46:13,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:46:13,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:46:13,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:46:13,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:46:13,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:13,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:46:13,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:46:13,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:46:13,039 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:46:13,040 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:46:13,040 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:46:13,040 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:46:13,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:46:13,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:46:13,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:46:13,042 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 [2021-11-13 18:46:13,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:46:13,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:46:13,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:46:13,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:46:13,586 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:46:13,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-11-13 18:46:13,677 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/2a74e6e68/d4a8f9796c6d43c29aa3e565255a5101/FLAG2bf6bc613 [2021-11-13 18:46:14,409 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:46:14,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-11-13 18:46:14,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/2a74e6e68/d4a8f9796c6d43c29aa3e565255a5101/FLAG2bf6bc613 [2021-11-13 18:46:14,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/data/2a74e6e68/d4a8f9796c6d43c29aa3e565255a5101 [2021-11-13 18:46:14,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:46:14,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:46:14,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:14,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:46:14,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:46:14,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:14" (1/1) ... [2021-11-13 18:46:14,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d71714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:14, skipping insertion in model container [2021-11-13 18:46:14,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:14" (1/1) ... [2021-11-13 18:46:14,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:46:14,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:15,017 WARN L228 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_f7da4b7a-ba48-4778-8de6-87aa78ca4274/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-11-13 18:46:15,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:15,037 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:46:15,059 WARN L228 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_f7da4b7a-ba48-4778-8de6-87aa78ca4274/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-11-13 18:46:15,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:15,081 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:46:15,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15 WrapperNode [2021-11-13 18:46:15,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:15,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:15,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:46:15,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:46:15,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:15,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:46:15,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:46:15,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:46:15,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:46:15,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:46:15,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:46:15,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:46:15,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (1/1) ... [2021-11-13 18:46:15,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:15,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:15,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:46:15,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:46:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:46:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-11-13 18:46:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-11-13 18:46:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:46:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-11-13 18:46:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-11-13 18:46:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:46:15,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:46:15,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:46:15,769 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:46:15,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:15 BoogieIcfgContainer [2021-11-13 18:46:15,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:46:15,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:46:15,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:46:15,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:46:15,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:46:14" (1/3) ... [2021-11-13 18:46:15,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffc260d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:15, skipping insertion in model container [2021-11-13 18:46:15,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:15" (2/3) ... [2021-11-13 18:46:15,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffc260d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:15, skipping insertion in model container [2021-11-13 18:46:15,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:15" (3/3) ... [2021-11-13 18:46:15,799 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2021-11-13 18:46:15,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:46:15,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:46:15,886 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:46:15,900 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:46:15,901 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:46:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:46:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:46:15,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:15,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:15,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2021-11-13 18:46:15,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:15,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044536987] [2021-11-13 18:46:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:15,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:16,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:16,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:46:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:46:16,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:16,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:16,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:16,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044536987] [2021-11-13 18:46:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044536987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:16,506 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:16,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 18:46:16,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905304469] [2021-11-13 18:46:16,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:16,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:16,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:16,553 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:16,739 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-13 18:46:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:46:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 10 [2021-11-13 18:46:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:16,753 INFO L225 Difference]: With dead ends: 37 [2021-11-13 18:46:16,753 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:46:16,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:16,762 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:16,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 100 Invalid, 39 Unknown, 0 Unchecked, 5.03ms Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 84.50ms Time] [2021-11-13 18:46:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:46:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-13 18:46:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 18:46:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-13 18:46:16,841 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2021-11-13 18:46:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:16,842 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-13 18:46:16,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-13 18:46:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:46:16,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:16,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:16,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:17,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:17,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2131805067, now seen corresponding path program 1 times [2021-11-13 18:46:17,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:17,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027299262] [2021-11-13 18:46:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:17,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:17,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:17,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:46:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:46:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:17,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:17,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:17,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027299262] [2021-11-13 18:46:17,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027299262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:17,347 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:17,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-13 18:46:17,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228920807] [2021-11-13 18:46:17,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:17,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:46:17,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:17,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:46:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:17,352 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:17,461 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-11-13 18:46:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:46:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-13 18:46:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:17,465 INFO L225 Difference]: With dead ends: 31 [2021-11-13 18:46:17,465 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 18:46:17,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:17,468 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:17,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 55 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 81.07ms Time] [2021-11-13 18:46:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 18:46:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-13 18:46:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 18:46:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-11-13 18:46:17,481 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2021-11-13 18:46:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:17,482 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-11-13 18:46:17,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:46:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-11-13 18:46:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:46:17,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:17,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:17,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:17,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:17,698 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:17,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:17,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1494555912, now seen corresponding path program 1 times [2021-11-13 18:46:17,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:17,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209952394] [2021-11-13 18:46:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:17,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:17,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:17,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:46:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:17,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:46:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:17,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:18,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209952394] [2021-11-13 18:46:18,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209952394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:18,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:18,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-13 18:46:18,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144547350] [2021-11-13 18:46:18,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:18,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:46:18,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:46:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:46:18,356 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:46:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:18,636 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2021-11-13 18:46:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2021-11-13 18:46:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:18,640 INFO L225 Difference]: With dead ends: 37 [2021-11-13 18:46:18,640 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:46:18,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:46:18,643 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.63ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:18,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 81 Invalid, 101 Unknown, 0 Unchecked, 4.63ms Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 218.66ms Time] [2021-11-13 18:46:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:46:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-11-13 18:46:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-13 18:46:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-11-13 18:46:18,656 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2021-11-13 18:46:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-11-13 18:46:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:46:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-11-13 18:46:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:46:18,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:18,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:18,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:18,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:18,873 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 814571350, now seen corresponding path program 1 times [2021-11-13 18:46:18,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:18,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316282032] [2021-11-13 18:46:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:18,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:18,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:18,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:46:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:46:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:19,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:19,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:19,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316282032] [2021-11-13 18:46:19,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316282032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:19,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:19,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-13 18:46:19,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532038216] [2021-11-13 18:46:19,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:46:19,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:46:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:46:19,440 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:46:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:19,649 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2021-11-13 18:46:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2021-11-13 18:46:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:19,652 INFO L225 Difference]: With dead ends: 61 [2021-11-13 18:46:19,652 INFO L226 Difference]: Without dead ends: 35 [2021-11-13 18:46:19,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:46:19,656 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:19,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 101 Invalid, 123 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 165.04ms Time] [2021-11-13 18:46:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-13 18:46:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-11-13 18:46:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-13 18:46:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-11-13 18:46:19,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2021-11-13 18:46:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:19,673 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-11-13 18:46:19,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:46:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2021-11-13 18:46:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:46:19,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:19,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:19,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:19,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:19,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1581983960, now seen corresponding path program 1 times [2021-11-13 18:46:19,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:19,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290364822] [2021-11-13 18:46:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:19,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:19,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:19,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:19,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:46:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:46:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:46:20,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:46:20,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:20,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290364822] [2021-11-13 18:46:20,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290364822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:20,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:20,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-11-13 18:46:20,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660579634] [2021-11-13 18:46:20,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:20,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:46:20,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:20,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:46:20,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:46:20,971 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:46:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:21,351 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2021-11-13 18:46:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:46:21,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 34 [2021-11-13 18:46:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:21,355 INFO L225 Difference]: With dead ends: 49 [2021-11-13 18:46:21,355 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:46:21,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:46:21,357 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:21,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 93 Invalid, 140 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [18 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 284.41ms Time] [2021-11-13 18:46:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:46:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-11-13 18:46:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2021-11-13 18:46:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2021-11-13 18:46:21,389 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 34 [2021-11-13 18:46:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:21,391 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2021-11-13 18:46:21,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:46:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2021-11-13 18:46:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:46:21,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:21,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:21,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:21,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:21,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1656487097, now seen corresponding path program 1 times [2021-11-13 18:46:21,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:21,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752586210] [2021-11-13 18:46:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:21,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:21,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:21,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:46:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:46:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 18:46:21,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:46:22,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:22,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752586210] [2021-11-13 18:46:22,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752586210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:22,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:22,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-11-13 18:46:22,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900105314] [2021-11-13 18:46:22,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:22,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:46:22,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:46:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:46:22,298 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:46:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:22,556 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-11-13 18:46:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:46:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 35 [2021-11-13 18:46:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:22,560 INFO L225 Difference]: With dead ends: 79 [2021-11-13 18:46:22,560 INFO L226 Difference]: Without dead ends: 46 [2021-11-13 18:46:22,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:46:22,563 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.99ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 163 Unknown, 0 Unchecked, 3.99ms Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 185.33ms Time] [2021-11-13 18:46:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-13 18:46:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-13 18:46:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 10 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (37), 14 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-13 18:46:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2021-11-13 18:46:22,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 35 [2021-11-13 18:46:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:22,583 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2021-11-13 18:46:22,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:46:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2021-11-13 18:46:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:46:22,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:22,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:22,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:22,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:22,801 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash 600804856, now seen corresponding path program 2 times [2021-11-13 18:46:22,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:22,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159210593] [2021-11-13 18:46:22,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:22,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:22,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:22,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:22,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:46:22,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:22,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:22,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:46:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:46:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:46:24,323 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:24,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159210593] [2021-11-13 18:46:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159210593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:24,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:24,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2021-11-13 18:46:24,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953382902] [2021-11-13 18:46:24,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:46:24,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:46:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:46:24,327 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-13 18:46:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:24,933 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2021-11-13 18:46:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:46:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 46 [2021-11-13 18:46:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:24,937 INFO L225 Difference]: With dead ends: 70 [2021-11-13 18:46:24,937 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 18:46:24,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:46:24,940 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 354.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.24ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 426.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:24,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 210 Unknown, 0 Unchecked, 5.24ms Time], IncrementalHoareTripleChecker [25 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 426.57ms Time] [2021-11-13 18:46:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 18:46:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2021-11-13 18:46:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 10 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2021-11-13 18:46:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 90 transitions. [2021-11-13 18:46:24,972 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 90 transitions. Word has length 46 [2021-11-13 18:46:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:24,973 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 90 transitions. [2021-11-13 18:46:24,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-13 18:46:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 90 transitions. [2021-11-13 18:46:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 18:46:24,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:24,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:24,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:25,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:25,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1482129412, now seen corresponding path program 1 times [2021-11-13 18:46:25,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:25,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871037343] [2021-11-13 18:46:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:25,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:25,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:25,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:46:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:46:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 18:46:25,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:46:26,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:26,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871037343] [2021-11-13 18:46:26,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871037343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:26,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:26,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2021-11-13 18:46:26,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619016497] [2021-11-13 18:46:26,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:26,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:46:26,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:46:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:46:26,172 INFO L87 Difference]: Start difference. First operand 50 states and 90 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-13 18:46:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:26,441 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2021-11-13 18:46:26,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:46:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 47 [2021-11-13 18:46:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:26,445 INFO L225 Difference]: With dead ends: 108 [2021-11-13 18:46:26,445 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 18:46:26,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:46:26,450 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:26,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 135 Invalid, 190 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [17 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 199.62ms Time] [2021-11-13 18:46:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 18:46:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-13 18:46:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2021-11-13 18:46:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-11-13 18:46:26,474 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 47 [2021-11-13 18:46:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:26,475 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-11-13 18:46:26,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-13 18:46:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-11-13 18:46:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:46:26,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:26,480 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:26,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:26,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:26,695 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash -425933224, now seen corresponding path program 3 times [2021-11-13 18:46:26,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:26,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253003592] [2021-11-13 18:46:26,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:46:26,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:26,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:26,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:46:26,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:46:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:46:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:46:26,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:46:27,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:27,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253003592] [2021-11-13 18:46:27,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253003592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:27,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:27,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-13 18:46:27,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134504561] [2021-11-13 18:46:27,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:27,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:46:27,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:46:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:46:27,468 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 18:46:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:27,655 INFO L93 Difference]: Finished difference Result 83 states and 163 transitions. [2021-11-13 18:46:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 58 [2021-11-13 18:46:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:27,659 INFO L225 Difference]: With dead ends: 83 [2021-11-13 18:46:27,659 INFO L226 Difference]: Without dead ends: 79 [2021-11-13 18:46:27,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:46:27,661 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:27,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 121 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 152.15ms Time] [2021-11-13 18:46:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-13 18:46:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-11-13 18:46:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2021-11-13 18:46:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-11-13 18:46:27,684 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 58 [2021-11-13 18:46:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:27,685 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-11-13 18:46:27,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 18:46:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-11-13 18:46:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:46:27,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:27,688 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:27,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:27,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:27,900 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:27,901 INFO L85 PathProgramCache]: Analyzing trace with hash -354787678, now seen corresponding path program 2 times [2021-11-13 18:46:27,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:27,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061601103] [2021-11-13 18:46:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:27,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:27,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:27,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:46:27,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:27,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:46:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:46:28,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:46:29,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:29,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061601103] [2021-11-13 18:46:29,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061601103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:29,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:29,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-11-13 18:46:29,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099017326] [2021-11-13 18:46:29,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:29,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:46:29,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:46:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:46:29,541 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-13 18:46:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:30,345 INFO L93 Difference]: Finished difference Result 163 states and 460 transitions. [2021-11-13 18:46:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:46:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) Word has length 59 [2021-11-13 18:46:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:30,348 INFO L225 Difference]: With dead ends: 163 [2021-11-13 18:46:30,349 INFO L226 Difference]: Without dead ends: 105 [2021-11-13 18:46:30,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:46:30,351 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 456.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 553.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:30,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 145 Invalid, 374 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [64 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 553.86ms Time] [2021-11-13 18:46:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-13 18:46:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-11-13 18:46:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 20 states have call successors, (20), 5 states have call predecessors, (20), 22 states have return successors, (150), 33 states have call predecessors, (150), 20 states have call successors, (150) [2021-11-13 18:46:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 232 transitions. [2021-11-13 18:46:30,379 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 232 transitions. Word has length 59 [2021-11-13 18:46:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:30,380 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 232 transitions. [2021-11-13 18:46:30,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-13 18:46:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 232 transitions. [2021-11-13 18:46:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 18:46:30,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:30,384 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:30,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:30,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:30,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash -580629115, now seen corresponding path program 1 times [2021-11-13 18:46:30,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:30,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008364016] [2021-11-13 18:46:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:30,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:30,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:30,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:46:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:46:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 13 proven. 78 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 18:46:30,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 13 proven. 88 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-13 18:46:31,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:31,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008364016] [2021-11-13 18:46:31,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008364016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:31,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:31,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-11-13 18:46:31,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484223460] [2021-11-13 18:46:31,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:31,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:46:31,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:46:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:46:31,675 INFO L87 Difference]: Start difference. First operand 99 states and 232 transitions. Second operand has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 16 states have internal predecessors, (50), 13 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 6 states have call predecessors, (18), 13 states have call successors, (18) [2021-11-13 18:46:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:32,065 INFO L93 Difference]: Finished difference Result 209 states and 648 transitions. [2021-11-13 18:46:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:46:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 16 states have internal predecessors, (50), 13 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 6 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2021-11-13 18:46:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:32,069 INFO L225 Difference]: With dead ends: 209 [2021-11-13 18:46:32,070 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 18:46:32,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:46:32,073 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.72ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:32,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 228 Invalid, 308 Unknown, 0 Unchecked, 6.72ms Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 295.29ms Time] [2021-11-13 18:46:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 18:46:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-11-13 18:46:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 62 states have (on average 1.096774193548387) internal successors, (68), 66 states have internal predecessors, (68), 22 states have call successors, (22), 5 states have call predecessors, (22), 25 states have return successors, (186), 38 states have call predecessors, (186), 22 states have call successors, (186) [2021-11-13 18:46:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2021-11-13 18:46:32,122 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 84 [2021-11-13 18:46:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:32,124 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2021-11-13 18:46:32,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 16 states have internal predecessors, (50), 13 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 6 states have call predecessors, (18), 13 states have call successors, (18) [2021-11-13 18:46:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2021-11-13 18:46:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 18:46:32,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:32,137 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:32,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:32,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:32,351 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash 398895823, now seen corresponding path program 2 times [2021-11-13 18:46:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:32,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39518554] [2021-11-13 18:46:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:32,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:32,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:32,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:46:32,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:32,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:46:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 27 proven. 209 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-11-13 18:46:33,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 27 proven. 223 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-13 18:46:34,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:34,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39518554] [2021-11-13 18:46:34,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39518554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:34,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:34,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-11-13 18:46:34,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971070801] [2021-11-13 18:46:34,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:34,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:46:34,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:46:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:46:34,568 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand has 18 states, 16 states have (on average 3.375) internal successors, (54), 18 states have internal predecessors, (54), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-13 18:46:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:36,301 INFO L93 Difference]: Finished difference Result 322 states and 1120 transitions. [2021-11-13 18:46:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:46:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 18 states have internal predecessors, (54), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 143 [2021-11-13 18:46:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:36,311 INFO L225 Difference]: With dead ends: 322 [2021-11-13 18:46:36,311 INFO L226 Difference]: Without dead ends: 215 [2021-11-13 18:46:36,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:46:36,317 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 948.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.77ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1113.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:36,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 262 Invalid, 645 Unknown, 0 Unchecked, 8.77ms Time], IncrementalHoareTripleChecker [52 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 1113.49ms Time] [2021-11-13 18:46:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-13 18:46:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 209. [2021-11-13 18:46:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 128 states have internal predecessors, (136), 36 states have call successors, (36), 13 states have call predecessors, (36), 49 states have return successors, (406), 67 states have call predecessors, (406), 36 states have call successors, (406) [2021-11-13 18:46:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 578 transitions. [2021-11-13 18:46:36,377 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 578 transitions. Word has length 143 [2021-11-13 18:46:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 578 transitions. [2021-11-13 18:46:36,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 18 states have internal predecessors, (54), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-13 18:46:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 578 transitions. [2021-11-13 18:46:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-13 18:46:36,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:36,411 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 22, 17, 16, 14, 14, 14, 14, 14, 14, 13, 11, 11, 11, 11, 11, 11, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:36,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:36,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:36,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash 52781266, now seen corresponding path program 2 times [2021-11-13 18:46:36,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:36,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99537658] [2021-11-13 18:46:36,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:36,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:36,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:36,629 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:46:36,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:36,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:46:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 74 proven. 567 refuted. 0 times theorem prover too weak. 2559 trivial. 0 not checked. [2021-11-13 18:46:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 74 proven. 583 refuted. 0 times theorem prover too weak. 2543 trivial. 0 not checked. [2021-11-13 18:46:39,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:39,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99537658] [2021-11-13 18:46:39,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99537658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:39,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:39,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-11-13 18:46:39,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646321304] [2021-11-13 18:46:39,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:39,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:46:39,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:39,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:46:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:46:39,707 INFO L87 Difference]: Start difference. First operand 209 states and 578 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-13 18:46:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:40,227 INFO L93 Difference]: Finished difference Result 443 states and 1689 transitions. [2021-11-13 18:46:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:46:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 315 [2021-11-13 18:46:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:40,239 INFO L225 Difference]: With dead ends: 443 [2021-11-13 18:46:40,239 INFO L226 Difference]: Without dead ends: 237 [2021-11-13 18:46:40,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:46:40,248 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 335.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 392.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:40,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 315 Invalid, 414 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 392.88ms Time] [2021-11-13 18:46:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-13 18:46:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-11-13 18:46:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 137 states have (on average 1.094890510948905) internal successors, (150), 142 states have internal predecessors, (150), 40 states have call successors, (40), 13 states have call predecessors, (40), 56 states have return successors, (534), 78 states have call predecessors, (534), 40 states have call successors, (534) [2021-11-13 18:46:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 724 transitions. [2021-11-13 18:46:40,327 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 724 transitions. Word has length 315 [2021-11-13 18:46:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:40,329 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 724 transitions. [2021-11-13 18:46:40,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-13 18:46:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 724 transitions. [2021-11-13 18:46:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 18:46:40,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:40,340 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:40,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:40,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:40,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:40,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1863902760, now seen corresponding path program 4 times [2021-11-13 18:46:40,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:40,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835479405] [2021-11-13 18:46:40,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:46:40,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:40,564 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:40,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:46:40,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:46:40,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:46:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 23 proven. 136 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-13 18:46:41,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 23 proven. 157 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 18:46:43,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:43,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835479405] [2021-11-13 18:46:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835479405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:43,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:43,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2021-11-13 18:46:43,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621899361] [2021-11-13 18:46:43,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:43,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:46:43,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:46:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:46:43,443 INFO L87 Difference]: Start difference. First operand 234 states and 724 transitions. Second operand has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-13 18:46:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:45,676 INFO L93 Difference]: Finished difference Result 690 states and 3320 transitions. [2021-11-13 18:46:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:46:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 106 [2021-11-13 18:46:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:45,699 INFO L225 Difference]: With dead ends: 690 [2021-11-13 18:46:45,699 INFO L226 Difference]: Without dead ends: 459 [2021-11-13 18:46:45,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:46:45,713 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1125.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.89ms SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1327.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:45,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 210 Invalid, 730 Unknown, 0 Unchecked, 8.89ms Time], IncrementalHoareTripleChecker [167 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 1327.76ms Time] [2021-11-13 18:46:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-13 18:46:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2021-11-13 18:46:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 255 states have (on average 1.1058823529411765) internal successors, (282), 262 states have internal predecessors, (282), 73 states have call successors, (73), 25 states have call predecessors, (73), 105 states have return successors, (1274), 146 states have call predecessors, (1274), 73 states have call successors, (1274) [2021-11-13 18:46:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1629 transitions. [2021-11-13 18:46:45,871 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1629 transitions. Word has length 106 [2021-11-13 18:46:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:45,872 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1629 transitions. [2021-11-13 18:46:45,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-13 18:46:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1629 transitions. [2021-11-13 18:46:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-13 18:46:45,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:45,899 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 21, 19, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:45,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:46,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:46,114 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:46,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1014379344, now seen corresponding path program 3 times [2021-11-13 18:46:46,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:46,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654999387] [2021-11-13 18:46:46,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:46:46,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:46,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:46,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:46:46,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:46:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:46,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:46:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6494 backedges. 740 proven. 4 refuted. 0 times theorem prover too weak. 5750 trivial. 0 not checked. [2021-11-13 18:46:47,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6494 backedges. 743 proven. 4 refuted. 0 times theorem prover too weak. 5747 trivial. 0 not checked. [2021-11-13 18:46:49,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:49,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654999387] [2021-11-13 18:46:49,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654999387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:49,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:49,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-11-13 18:46:49,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827977955] [2021-11-13 18:46:49,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:49,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:46:49,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:46:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:46:49,933 INFO L87 Difference]: Start difference. First operand 434 states and 1629 transitions. Second operand has 14 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-13 18:46:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:50,542 INFO L93 Difference]: Finished difference Result 989 states and 5804 transitions. [2021-11-13 18:46:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:46:50,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 446 [2021-11-13 18:46:50,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:50,569 INFO L225 Difference]: With dead ends: 989 [2021-11-13 18:46:50,569 INFO L226 Difference]: Without dead ends: 474 [2021-11-13 18:46:50,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 876 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:46:50,599 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 387.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:50,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 309 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [39 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 387.90ms Time] [2021-11-13 18:46:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-13 18:46:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 390. [2021-11-13 18:46:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 229 states have (on average 1.091703056768559) internal successors, (250), 231 states have internal predecessors, (250), 67 states have call successors, (67), 22 states have call predecessors, (67), 93 states have return successors, (1147), 136 states have call predecessors, (1147), 67 states have call successors, (1147) [2021-11-13 18:46:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1464 transitions. [2021-11-13 18:46:50,823 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1464 transitions. Word has length 446 [2021-11-13 18:46:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:50,825 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1464 transitions. [2021-11-13 18:46:50,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-13 18:46:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1464 transitions. [2021-11-13 18:46:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2021-11-13 18:46:50,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:50,866 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 33, 32, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 25, 25, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:50,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:51,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:51,088 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1425839997, now seen corresponding path program 4 times [2021-11-13 18:46:51,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:51,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509171400] [2021-11-13 18:46:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:46:51,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:51,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:51,092 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:51,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:46:51,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:46:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:46:51,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16372 backedges. 263 proven. 1790 refuted. 0 times theorem prover too weak. 14319 trivial. 0 not checked. [2021-11-13 18:46:53,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16372 backedges. 263 proven. 1820 refuted. 0 times theorem prover too weak. 14289 trivial. 0 not checked. [2021-11-13 18:46:59,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:59,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509171400] [2021-11-13 18:46:59,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509171400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:59,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:59,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2021-11-13 18:46:59,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114300696] [2021-11-13 18:46:59,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:59,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:46:59,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:46:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:46:59,224 INFO L87 Difference]: Start difference. First operand 390 states and 1464 transitions. Second operand has 22 states, 20 states have (on average 3.25) internal successors, (65), 22 states have internal predecessors, (65), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-13 18:47:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:02,775 INFO L93 Difference]: Finished difference Result 1142 states and 6518 transitions. [2021-11-13 18:47:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:47:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.25) internal successors, (65), 22 states have internal predecessors, (65), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 702 [2021-11-13 18:47:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:02,809 INFO L225 Difference]: With dead ends: 1142 [2021-11-13 18:47:02,810 INFO L226 Difference]: Without dead ends: 755 [2021-11-13 18:47:02,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1382 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=352, Invalid=1904, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:47:02,832 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1720.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.03ms SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2020.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:02,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 280 Invalid, 971 Unknown, 0 Unchecked, 12.03ms Time], IncrementalHoareTripleChecker [162 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 2020.56ms Time] [2021-11-13 18:47:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-13 18:47:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 683. [2021-11-13 18:47:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 402 states have (on average 1.099502487562189) internal successors, (442), 401 states have internal predecessors, (442), 118 states have call successors, (118), 40 states have call predecessors, (118), 162 states have return successors, (2466), 241 states have call predecessors, (2466), 118 states have call successors, (2466) [2021-11-13 18:47:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 3026 transitions. [2021-11-13 18:47:03,310 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 3026 transitions. Word has length 702 [2021-11-13 18:47:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:03,311 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 3026 transitions. [2021-11-13 18:47:03,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.25) internal successors, (65), 22 states have internal predecessors, (65), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-13 18:47:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 3026 transitions. [2021-11-13 18:47:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-11-13 18:47:03,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:03,374 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 44, 44, 31, 29, 26, 26, 26, 26, 26, 26, 24, 22, 22, 22, 22, 22, 22, 13, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:03,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:03,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:03,602 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1094192790, now seen corresponding path program 5 times [2021-11-13 18:47:03,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:03,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546281677] [2021-11-13 18:47:03,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:03,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:03,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:03,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:03,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:47:03,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:47:03,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:47:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3039 proven. 0 refuted. 0 times theorem prover too weak. 8666 trivial. 0 not checked. [2021-11-13 18:47:04,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 380 proven. 836 refuted. 0 times theorem prover too weak. 10489 trivial. 0 not checked. [2021-11-13 18:47:07,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:07,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546281677] [2021-11-13 18:47:07,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546281677] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:07,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:47:07,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-13 18:47:07,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532257613] [2021-11-13 18:47:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:07,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:47:07,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:47:07,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:47:07,619 INFO L87 Difference]: Start difference. First operand 683 states and 3026 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:47:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:07,765 INFO L93 Difference]: Finished difference Result 1144 states and 5761 transitions. [2021-11-13 18:47:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:47:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 593 [2021-11-13 18:47:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:07,781 INFO L225 Difference]: With dead ends: 1144 [2021-11-13 18:47:07,781 INFO L226 Difference]: Without dead ends: 444 [2021-11-13 18:47:07,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 1177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:47:07,808 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.84ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:07,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 47 Unknown, 0 Unchecked, 0.84ms Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 62.41ms Time] [2021-11-13 18:47:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-13 18:47:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 398. [2021-11-13 18:47:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 237 states have (on average 1.1012658227848102) internal successors, (261), 236 states have internal predecessors, (261), 72 states have call successors, (72), 30 states have call predecessors, (72), 88 states have return successors, (805), 131 states have call predecessors, (805), 72 states have call successors, (805) [2021-11-13 18:47:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1138 transitions. [2021-11-13 18:47:07,916 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1138 transitions. Word has length 593 [2021-11-13 18:47:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:07,916 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1138 transitions. [2021-11-13 18:47:07,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:47:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1138 transitions. [2021-11-13 18:47:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-13 18:47:07,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:07,932 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 24, 21, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:07,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:08,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:08,147 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash -168496601, now seen corresponding path program 6 times [2021-11-13 18:47:08,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:08,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006862599] [2021-11-13 18:47:08,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:08,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:08,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:08,150 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:08,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:47:08,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-13 18:47:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:47:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5302 backedges. 1094 proven. 2 refuted. 0 times theorem prover too weak. 4206 trivial. 0 not checked. [2021-11-13 18:47:09,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5302 backedges. 234 proven. 601 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2021-11-13 18:47:12,098 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:12,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006862599] [2021-11-13 18:47:12,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006862599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:12,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:12,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-13 18:47:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368480310] [2021-11-13 18:47:12,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:12,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:47:12,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:47:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:47:12,102 INFO L87 Difference]: Start difference. First operand 398 states and 1138 transitions. Second operand has 18 states, 13 states have (on average 4.076923076923077) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2021-11-13 18:47:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:12,520 INFO L93 Difference]: Finished difference Result 590 states and 1902 transitions. [2021-11-13 18:47:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:47:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 4.076923076923077) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 407 [2021-11-13 18:47:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:12,525 INFO L225 Difference]: With dead ends: 590 [2021-11-13 18:47:12,526 INFO L226 Difference]: Without dead ends: 166 [2021-11-13 18:47:12,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 796 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:47:12,533 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:12,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 118 Invalid, 160 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [27 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 225.49ms Time] [2021-11-13 18:47:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-13 18:47:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 143. [2021-11-13 18:47:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 89 states have internal predecessors, (95), 25 states have call successors, (25), 10 states have call predecessors, (25), 31 states have return successors, (132), 43 states have call predecessors, (132), 25 states have call successors, (132) [2021-11-13 18:47:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 252 transitions. [2021-11-13 18:47:12,557 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 252 transitions. Word has length 407 [2021-11-13 18:47:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:12,558 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 252 transitions. [2021-11-13 18:47:12,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 4.076923076923077) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2021-11-13 18:47:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 252 transitions. [2021-11-13 18:47:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-11-13 18:47:12,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:12,564 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 25, 22, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 10, 8, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:12,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:12,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:12,785 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:12,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1793569084, now seen corresponding path program 7 times [2021-11-13 18:47:12,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:12,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469232893] [2021-11-13 18:47:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:12,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:12,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:12,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:12,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:47:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:13,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:47:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4483 backedges. 334 proven. 620 refuted. 0 times theorem prover too weak. 3529 trivial. 0 not checked. [2021-11-13 18:47:13,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4483 backedges. 334 proven. 644 refuted. 0 times theorem prover too weak. 3505 trivial. 0 not checked. [2021-11-13 18:47:16,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:16,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469232893] [2021-11-13 18:47:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469232893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:16,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:16,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2021-11-13 18:47:16,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199477108] [2021-11-13 18:47:16,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:16,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:47:16,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:47:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:47:16,428 INFO L87 Difference]: Start difference. First operand 143 states and 252 transitions. Second operand has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 16 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (26), 11 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-13 18:47:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:17,249 INFO L93 Difference]: Finished difference Result 307 states and 726 transitions. [2021-11-13 18:47:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:47:17,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 16 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (26), 11 states have call predecessors, (26), 16 states have call successors, (26) Word has length 376 [2021-11-13 18:47:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:17,257 INFO L225 Difference]: With dead ends: 307 [2021-11-13 18:47:17,257 INFO L226 Difference]: Without dead ends: 210 [2021-11-13 18:47:17,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:47:17,261 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 443.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.34ms SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 535.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:17,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 198 Invalid, 555 Unknown, 0 Unchecked, 4.34ms Time], IncrementalHoareTripleChecker [100 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 535.00ms Time] [2021-11-13 18:47:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-13 18:47:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 174. [2021-11-13 18:47:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 109 states have internal predecessors, (121), 32 states have call successors, (32), 15 states have call predecessors, (32), 34 states have return successors, (213), 49 states have call predecessors, (213), 32 states have call successors, (213) [2021-11-13 18:47:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 366 transitions. [2021-11-13 18:47:17,294 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 366 transitions. Word has length 376 [2021-11-13 18:47:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:17,295 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 366 transitions. [2021-11-13 18:47:17,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 16 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (26), 11 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-13 18:47:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 366 transitions. [2021-11-13 18:47:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 932 [2021-11-13 18:47:17,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:17,310 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 70, 70, 60, 58, 38, 38, 38, 38, 38, 38, 35, 35, 35, 35, 35, 35, 25, 20, 17, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:17,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:17,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:17,527 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2071258427, now seen corresponding path program 8 times [2021-11-13 18:47:17,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:17,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790988101] [2021-11-13 18:47:17,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:17,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:17,531 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:17,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 18:47:18,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:47:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 28681 backedges. 383 proven. 1018 refuted. 0 times theorem prover too weak. 27280 trivial. 0 not checked. [2021-11-13 18:47:19,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 28681 backedges. 383 proven. 1023 refuted. 0 times theorem prover too weak. 27275 trivial. 0 not checked. [2021-11-13 18:47:24,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:24,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790988101] [2021-11-13 18:47:24,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790988101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:24,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:24,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2021-11-13 18:47:24,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809494865] [2021-11-13 18:47:24,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:24,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:47:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:47:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:47:24,323 INFO L87 Difference]: Start difference. First operand 174 states and 366 transitions. Second operand has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 14 states have internal predecessors, (46), 9 states have call successors, (16), 1 states have call predecessors, (16), 5 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-13 18:47:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:24,620 INFO L93 Difference]: Finished difference Result 391 states and 1070 transitions. [2021-11-13 18:47:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:47:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 14 states have internal predecessors, (46), 9 states have call successors, (16), 1 states have call predecessors, (16), 5 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) Word has length 931 [2021-11-13 18:47:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:24,630 INFO L225 Difference]: With dead ends: 391 [2021-11-13 18:47:24,631 INFO L226 Difference]: Without dead ends: 223 [2021-11-13 18:47:24,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1864 GetRequests, 1848 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:47:24,637 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 222.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:24,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 194 Invalid, 227 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 222.46ms Time] [2021-11-13 18:47:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-13 18:47:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 189. [2021-11-13 18:47:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 117 states have internal predecessors, (129), 35 states have call successors, (35), 15 states have call predecessors, (35), 38 states have return successors, (268), 56 states have call predecessors, (268), 35 states have call successors, (268) [2021-11-13 18:47:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 432 transitions. [2021-11-13 18:47:24,680 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 432 transitions. Word has length 931 [2021-11-13 18:47:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:24,681 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 432 transitions. [2021-11-13 18:47:24,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 14 states have internal predecessors, (46), 9 states have call successors, (16), 1 states have call predecessors, (16), 5 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-13 18:47:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 432 transitions. [2021-11-13 18:47:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-11-13 18:47:24,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:24,691 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 32, 30, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 14, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:24,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:24,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:24,903 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 957560556, now seen corresponding path program 9 times [2021-11-13 18:47:24,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:24,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089602478] [2021-11-13 18:47:24,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:24,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:24,906 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:24,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 18:47:25,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:47:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:47:25,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 1463 proven. 14 refuted. 0 times theorem prover too weak. 6267 trivial. 0 not checked. [2021-11-13 18:47:25,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 917 proven. 48 refuted. 0 times theorem prover too weak. 6779 trivial. 0 not checked. [2021-11-13 18:47:28,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:28,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089602478] [2021-11-13 18:47:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089602478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:28,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:28,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-11-13 18:47:28,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955589536] [2021-11-13 18:47:28,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:28,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:47:28,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:47:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:47:28,467 INFO L87 Difference]: Start difference. First operand 189 states and 432 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 9 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-13 18:47:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:28,990 INFO L93 Difference]: Finished difference Result 470 states and 1717 transitions. [2021-11-13 18:47:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:47:28,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 9 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 490 [2021-11-13 18:47:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:29,004 INFO L225 Difference]: With dead ends: 470 [2021-11-13 18:47:29,004 INFO L226 Difference]: Without dead ends: 287 [2021-11-13 18:47:29,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:47:29,008 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 396.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:29,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 242 Invalid, 380 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [29 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 396.33ms Time] [2021-11-13 18:47:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-13 18:47:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 253. [2021-11-13 18:47:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 151 states have internal predecessors, (167), 51 states have call successors, (51), 17 states have call predecessors, (51), 52 states have return successors, (576), 84 states have call predecessors, (576), 51 states have call successors, (576) [2021-11-13 18:47:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 794 transitions. [2021-11-13 18:47:29,079 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 794 transitions. Word has length 490 [2021-11-13 18:47:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:29,081 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 794 transitions. [2021-11-13 18:47:29,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 9 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-13 18:47:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 794 transitions. [2021-11-13 18:47:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2266 [2021-11-13 18:47:29,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:29,142 INFO L514 BasicCegarLoop]: trace histogram [181, 181, 178, 178, 149, 137, 90, 90, 90, 90, 90, 90, 89, 89, 89, 89, 89, 89, 60, 47, 41, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:29,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:29,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:29,356 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash 450707966, now seen corresponding path program 10 times [2021-11-13 18:47:29,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:29,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41309943] [2021-11-13 18:47:29,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:29,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:29,362 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:29,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 18:47:30,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:30,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:47:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 172277 backedges. 879 proven. 5644 refuted. 0 times theorem prover too weak. 165754 trivial. 0 not checked. [2021-11-13 18:47:34,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 172277 backedges. 879 proven. 5668 refuted. 0 times theorem prover too weak. 165730 trivial. 0 not checked. [2021-11-13 18:47:46,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:46,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41309943] [2021-11-13 18:47:46,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41309943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:46,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2021-11-13 18:47:46,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015176127] [2021-11-13 18:47:46,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:46,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:47:46,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:47:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:47:46,062 INFO L87 Difference]: Start difference. First operand 253 states and 794 transitions. Second operand has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 16 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (26), 11 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-13 18:47:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:46,765 INFO L93 Difference]: Finished difference Result 369 states and 1300 transitions. [2021-11-13 18:47:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:47:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 16 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (26), 11 states have call predecessors, (26), 16 states have call successors, (26) Word has length 2265 [2021-11-13 18:47:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:46,792 INFO L225 Difference]: With dead ends: 369 [2021-11-13 18:47:46,792 INFO L226 Difference]: Without dead ends: 317 [2021-11-13 18:47:46,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4544 GetRequests, 4511 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:47:46,795 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 332.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 383.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:46,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 196 Invalid, 454 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [129 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 383.04ms Time] [2021-11-13 18:47:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-13 18:47:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 261. [2021-11-13 18:47:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 156 states have (on average 1.141025641025641) internal successors, (178), 158 states have internal predecessors, (178), 53 states have call successors, (53), 20 states have call predecessors, (53), 51 states have return successors, (569), 82 states have call predecessors, (569), 53 states have call successors, (569) [2021-11-13 18:47:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 800 transitions. [2021-11-13 18:47:46,861 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 800 transitions. Word has length 2265 [2021-11-13 18:47:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:46,863 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 800 transitions. [2021-11-13 18:47:46,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 19 states have internal predecessors, (61), 16 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (26), 11 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-13 18:47:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 800 transitions. [2021-11-13 18:47:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2021-11-13 18:47:46,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:46,887 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 87, 87, 74, 70, 47, 47, 47, 47, 47, 47, 43, 43, 43, 43, 43, 43, 27, 27, 24, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:46,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:47,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:47:47,112 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2116514215, now seen corresponding path program 11 times [2021-11-13 18:47:47,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:47:47,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412673152] [2021-11-13 18:47:47,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:47,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:47:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:47:47,117 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:47:47,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 18:47:47,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-11-13 18:47:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 18:47:47,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 43516 backedges. 13755 proven. 2726 refuted. 0 times theorem prover too weak. 27035 trivial. 0 not checked. [2021-11-13 18:47:50,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 43516 backedges. 3785 proven. 3822 refuted. 0 times theorem prover too weak. 35909 trivial. 0 not checked. [2021-11-13 18:47:59,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:59,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412673152] [2021-11-13 18:47:59,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412673152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:59,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:47:59,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 28 [2021-11-13 18:47:59,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147215393] [2021-11-13 18:47:59,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:59,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 18:47:59,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:47:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 18:47:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:47:59,308 INFO L87 Difference]: Start difference. First operand 261 states and 800 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 24 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (48), 15 states have call predecessors, (48), 24 states have call successors, (48) [2021-11-13 18:48:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:00,633 INFO L93 Difference]: Finished difference Result 710 states and 4936 transitions. [2021-11-13 18:48:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:48:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 24 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (48), 15 states have call predecessors, (48), 24 states have call successors, (48) Word has length 1144 [2021-11-13 18:48:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:00,661 INFO L225 Difference]: With dead ends: 710 [2021-11-13 18:48:00,662 INFO L226 Difference]: Without dead ends: 446 [2021-11-13 18:48:00,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2298 GetRequests, 2260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1334, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:48:00,671 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 824.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.96ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 975.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:00,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 556 Invalid, 1172 Unknown, 0 Unchecked, 7.96ms Time], IncrementalHoareTripleChecker [130 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 975.00ms Time] [2021-11-13 18:48:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-13 18:48:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 366. [2021-11-13 18:48:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 208 states have (on average 1.125) internal successors, (234), 210 states have internal predecessors, (234), 83 states have call successors, (83), 22 states have call predecessors, (83), 74 states have return successors, (1348), 133 states have call predecessors, (1348), 83 states have call successors, (1348) [2021-11-13 18:48:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1665 transitions. [2021-11-13 18:48:00,805 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1665 transitions. Word has length 1144 [2021-11-13 18:48:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:00,807 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1665 transitions. [2021-11-13 18:48:00,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 24 states have call successors, (35), 2 states have call predecessors, (35), 13 states have return successors, (48), 15 states have call predecessors, (48), 24 states have call successors, (48) [2021-11-13 18:48:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1665 transitions. [2021-11-13 18:48:00,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2243 [2021-11-13 18:48:00,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:00,867 INFO L514 BasicCegarLoop]: trace histogram [182, 182, 173, 173, 144, 141, 91, 91, 91, 91, 91, 91, 86, 86, 86, 86, 86, 86, 58, 50, 38, 32, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:00,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:01,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:01,087 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1496642036, now seen corresponding path program 12 times [2021-11-13 18:48:01,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:48:01,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070378651] [2021-11-13 18:48:01,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:48:01,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:48:01,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:48:01,091 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:48:01,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 18:48:01,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-13 18:48:01,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:48:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 168812 backedges. 2554 proven. 3890 refuted. 0 times theorem prover too weak. 162368 trivial. 0 not checked. [2021-11-13 18:48:05,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 168812 backedges. 2552 proven. 3912 refuted. 0 times theorem prover too weak. 162348 trivial. 0 not checked. [2021-11-13 18:48:16,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:48:16,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070378651] [2021-11-13 18:48:16,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070378651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:16,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:48:16,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 23 [2021-11-13 18:48:16,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233526591] [2021-11-13 18:48:16,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:16,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:48:16,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:48:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:48:16,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:48:16,006 INFO L87 Difference]: Start difference. First operand 366 states and 1665 transitions. Second operand has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 23 states have internal predecessors, (64), 18 states have call successors, (24), 1 states have call predecessors, (24), 8 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-13 18:48:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:17,252 INFO L93 Difference]: Finished difference Result 757 states and 4728 transitions. [2021-11-13 18:48:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:48:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 23 states have internal predecessors, (64), 18 states have call successors, (24), 1 states have call predecessors, (24), 8 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) Word has length 2242 [2021-11-13 18:48:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:17,278 INFO L225 Difference]: With dead ends: 757 [2021-11-13 18:48:17,278 INFO L226 Difference]: Without dead ends: 403 [2021-11-13 18:48:17,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4491 GetRequests, 4461 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:48:17,290 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 82 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 694.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.19ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 815.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 301 Invalid, 551 Unknown, 0 Unchecked, 4.19ms Time], IncrementalHoareTripleChecker [85 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 815.90ms Time] [2021-11-13 18:48:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-13 18:48:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 338. [2021-11-13 18:48:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 198 states have (on average 1.1161616161616161) internal successors, (221), 200 states have internal predecessors, (221), 70 states have call successors, (70), 22 states have call predecessors, (70), 69 states have return successors, (986), 115 states have call predecessors, (986), 70 states have call successors, (986) [2021-11-13 18:48:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1277 transitions. [2021-11-13 18:48:17,397 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1277 transitions. Word has length 2242 [2021-11-13 18:48:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:17,399 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1277 transitions. [2021-11-13 18:48:17,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 23 states have internal predecessors, (64), 18 states have call successors, (24), 1 states have call predecessors, (24), 8 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2021-11-13 18:48:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1277 transitions. [2021-11-13 18:48:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2021-11-13 18:48:17,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:17,422 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 81, 81, 71, 67, 45, 45, 45, 45, 45, 45, 40, 40, 40, 40, 40, 40, 31, 22, 19, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:17,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:17,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:17,637 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash -427029928, now seen corresponding path program 13 times [2021-11-13 18:48:17,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:48:17,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283462284] [2021-11-13 18:48:17,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:48:17,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:48:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:48:17,642 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:48:17,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 18:48:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:48:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38986 backedges. 421 proven. 3030 refuted. 0 times theorem prover too weak. 35535 trivial. 0 not checked. [2021-11-13 18:48:20,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38986 backedges. 421 proven. 3063 refuted. 0 times theorem prover too weak. 35502 trivial. 0 not checked. [2021-11-13 18:48:24,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:48:24,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283462284] [2021-11-13 18:48:24,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283462284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:24,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:48:24,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2021-11-13 18:48:24,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139351694] [2021-11-13 18:48:24,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:25,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:48:25,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:48:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:48:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:48:25,002 INFO L87 Difference]: Start difference. First operand 338 states and 1277 transitions. Second operand has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 19 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 10 states have call predecessors, (28), 19 states have call successors, (28) [2021-11-13 18:48:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:25,781 INFO L93 Difference]: Finished difference Result 439 states and 1806 transitions. [2021-11-13 18:48:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:48:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 19 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 10 states have call predecessors, (28), 19 states have call successors, (28) Word has length 1083 [2021-11-13 18:48:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:25,802 INFO L225 Difference]: With dead ends: 439 [2021-11-13 18:48:25,802 INFO L226 Difference]: Without dead ends: 419 [2021-11-13 18:48:25,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2182 GetRequests, 2145 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:48:25,807 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 397.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 458.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:25,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 159 Invalid, 524 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [171 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 458.94ms Time] [2021-11-13 18:48:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-13 18:48:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 339. [2021-11-13 18:48:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 201 states have (on average 1.1044776119402986) internal successors, (222), 202 states have internal predecessors, (222), 68 states have call successors, (68), 23 states have call predecessors, (68), 69 states have return successors, (849), 113 states have call predecessors, (849), 68 states have call successors, (849) [2021-11-13 18:48:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1139 transitions. [2021-11-13 18:48:25,916 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1139 transitions. Word has length 1083 [2021-11-13 18:48:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:25,916 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1139 transitions. [2021-11-13 18:48:25,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 19 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 10 states have call predecessors, (28), 19 states have call successors, (28) [2021-11-13 18:48:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1139 transitions. [2021-11-13 18:48:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-13 18:48:25,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:25,933 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 11, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:25,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:26,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:26,147 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1088568863, now seen corresponding path program 14 times [2021-11-13 18:48:26,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:48:26,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236576161] [2021-11-13 18:48:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:26,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:48:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:48:26,151 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:48:26,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 18:48:26,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:26,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:48:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5144 backedges. 613 proven. 107 refuted. 0 times theorem prover too weak. 4424 trivial. 0 not checked. [2021-11-13 18:48:27,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5144 backedges. 613 proven. 117 refuted. 0 times theorem prover too weak. 4414 trivial. 0 not checked. [2021-11-13 18:48:28,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:48:28,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236576161] [2021-11-13 18:48:28,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236576161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:28,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:48:28,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-11-13 18:48:28,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893420146] [2021-11-13 18:48:28,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:28,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:48:28,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:48:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:48:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:48:28,566 INFO L87 Difference]: Start difference. First operand 339 states and 1139 transitions. Second operand has 16 states, 14 states have (on average 3.642857142857143) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-13 18:48:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:28,885 INFO L93 Difference]: Finished difference Result 433 states and 1479 transitions. [2021-11-13 18:48:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:48:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.642857142857143) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) Word has length 402 [2021-11-13 18:48:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:28,897 INFO L225 Difference]: With dead ends: 433 [2021-11-13 18:48:28,897 INFO L226 Difference]: Without dead ends: 429 [2021-11-13 18:48:28,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:48:28,900 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:28,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 208 Invalid, 256 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 183.56ms Time] [2021-11-13 18:48:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-13 18:48:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 345. [2021-11-13 18:48:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 205 states have (on average 1.102439024390244) internal successors, (226), 206 states have internal predecessors, (226), 68 states have call successors, (68), 23 states have call predecessors, (68), 71 states have return successors, (860), 115 states have call predecessors, (860), 68 states have call successors, (860) [2021-11-13 18:48:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1154 transitions. [2021-11-13 18:48:28,975 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1154 transitions. Word has length 402 [2021-11-13 18:48:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:28,976 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1154 transitions. [2021-11-13 18:48:28,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.642857142857143) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-13 18:48:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1154 transitions. [2021-11-13 18:48:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-11-13 18:48:28,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:28,993 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 41, 41, 35, 34, 23, 23, 23, 23, 23, 23, 20, 20, 20, 20, 20, 20, 15, 11, 11, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:29,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:29,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:29,207 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1488847579, now seen corresponding path program 15 times [2021-11-13 18:48:29,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:48:29,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268722984] [2021-11-13 18:48:29,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:48:29,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:48:29,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:48:29,210 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:48:29,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 18:48:29,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-13 18:48:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:48:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9905 backedges. 3101 proven. 21 refuted. 0 times theorem prover too weak. 6783 trivial. 0 not checked. [2021-11-13 18:48:30,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9905 backedges. 1141 proven. 134 refuted. 0 times theorem prover too weak. 8630 trivial. 0 not checked. [2021-11-13 18:48:32,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:48:32,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268722984] [2021-11-13 18:48:32,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268722984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:32,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:48:32,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-11-13 18:48:32,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405906566] [2021-11-13 18:48:32,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:32,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:48:32,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:48:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:48:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:48:32,415 INFO L87 Difference]: Start difference. First operand 345 states and 1154 transitions. Second operand has 16 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 10 states have call successors, (21), 2 states have call predecessors, (21), 7 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-13 18:48:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:32,991 INFO L93 Difference]: Finished difference Result 646 states and 2812 transitions. [2021-11-13 18:48:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:48:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 10 states have call successors, (21), 2 states have call predecessors, (21), 7 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 552 [2021-11-13 18:48:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:33,003 INFO L225 Difference]: With dead ends: 646 [2021-11-13 18:48:33,003 INFO L226 Difference]: Without dead ends: 315 [2021-11-13 18:48:33,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1088 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:48:33,011 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 313.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 371.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:33,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 241 Invalid, 365 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [30 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 371.14ms Time] [2021-11-13 18:48:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-13 18:48:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 289. [2021-11-13 18:48:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 175 states have (on average 1.0514285714285714) internal successors, (184), 173 states have internal predecessors, (184), 58 states have call successors, (58), 22 states have call predecessors, (58), 55 states have return successors, (526), 93 states have call predecessors, (526), 58 states have call successors, (526) [2021-11-13 18:48:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 768 transitions. [2021-11-13 18:48:33,126 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 768 transitions. Word has length 552 [2021-11-13 18:48:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:33,127 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 768 transitions. [2021-11-13 18:48:33,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 10 states have call successors, (21), 2 states have call predecessors, (21), 7 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-13 18:48:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 768 transitions. [2021-11-13 18:48:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-13 18:48:33,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:33,133 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:33,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:33,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:33,346 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:33,346 INFO L85 PathProgramCache]: Analyzing trace with hash -379544600, now seen corresponding path program 16 times [2021-11-13 18:48:33,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:48:33,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463935710] [2021-11-13 18:48:33,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:48:33,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:48:33,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:48:33,349 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:48:33,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 18:48:33,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:48:33,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-13 18:48:33,754 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:48:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:48:34,491 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:48:34,491 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:48:34,492 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:48:34,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:34,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:34,715 INFO L732 BasicCegarLoop]: Path program histogram: [16, 4, 2, 2, 1, 1, 1, 1] [2021-11-13 18:48:34,722 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:48:34,802 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:48:34,806 INFO L158 Benchmark]: Toolchain (without parser) took 140031.01ms. Allocated memory was 54.5MB in the beginning and 629.1MB in the end (delta: 574.6MB). Free memory was 32.3MB in the beginning and 468.4MB in the end (delta: -436.1MB). Peak memory consumption was 137.6MB. Max. memory is 16.1GB. [2021-11-13 18:48:34,806 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:48:34,807 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.31ms. Allocated memory is still 54.5MB. Free memory was 32.1MB in the beginning and 35.9MB in the end (delta: -3.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-11-13 18:48:34,807 INFO L158 Benchmark]: Boogie Procedure Inliner took 104.11ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 35.7MB in the beginning and 49.9MB in the end (delta: -14.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:48:34,807 INFO L158 Benchmark]: Boogie Preprocessor took 56.22ms. Allocated memory is still 67.1MB. Free memory was 49.9MB in the beginning and 49.0MB in the end (delta: 877.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:48:34,807 INFO L158 Benchmark]: RCFGBuilder took 539.70ms. Allocated memory is still 67.1MB. Free memory was 48.8MB in the beginning and 39.0MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:48:34,808 INFO L158 Benchmark]: TraceAbstraction took 139015.55ms. Allocated memory was 67.1MB in the beginning and 629.1MB in the end (delta: 562.0MB). Free memory was 38.5MB in the beginning and 468.4MB in the end (delta: -429.9MB). Peak memory consumption was 132.4MB. Max. memory is 16.1GB. [2021-11-13 18:48:34,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 54.5MB. Free memory is still 35.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.31ms. Allocated memory is still 54.5MB. Free memory was 32.1MB in the beginning and 35.9MB in the end (delta: -3.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 104.11ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 35.7MB in the beginning and 49.9MB in the end (delta: -14.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.22ms. Allocated memory is still 67.1MB. Free memory was 49.9MB in the beginning and 49.0MB in the end (delta: 877.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 539.70ms. Allocated memory is still 67.1MB. Free memory was 48.8MB in the beginning and 39.0MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 139015.55ms. Allocated memory was 67.1MB in the beginning and 629.1MB in the end (delta: 562.0MB). Free memory was 38.5MB in the beginning and 468.4MB in the end (delta: -429.9MB). Peak memory consumption was 132.4MB. 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:48:34,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7da4b7a-ba48-4778-8de6-87aa78ca4274/bin/uautomizer-YU5uOKAj3y/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: ERROR: ExceptionOrErrorResult: NullPointerException: null