./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:00:05,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:00:05,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:00:05,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:00:05,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:00:05,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:00:05,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:00:05,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:00:05,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:00:05,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:00:05,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:00:05,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:00:05,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:00:05,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:00:05,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:00:05,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:00:05,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:00:05,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:00:05,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:00:05,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:00:05,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:00:05,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:00:05,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:00:05,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:00:05,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:00:05,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:00:05,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:00:05,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:00:05,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:00:05,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:00:05,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:00:05,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:00:05,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:00:05,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:00:05,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:00:05,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:00:05,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:00:05,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:00:05,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:00:05,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:00:05,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:00:05,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:00:05,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:00:05,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:00:05,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:00:05,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:00:05,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:00:05,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:00:05,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:00:05,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:00:05,547 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:00:05,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:00:05,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:00:05,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:00:05,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:00:05,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:00:05,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:00:05,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:00:05,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:00:05,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:00:05,550 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:00:05,550 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:00:05,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:00:05,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:00:05,550 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-06 21:00:05,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:00:05,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:00:05,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:00:05,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:00:05,745 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:00:05,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-06 21:00:05,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/f2cf48315/2574eb3e8e124f9294cc3ff8310de276/FLAG4b02fe1e9 [2021-12-06 21:00:06,167 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:00:06,167 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-06 21:00:06,172 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/f2cf48315/2574eb3e8e124f9294cc3ff8310de276/FLAG4b02fe1e9 [2021-12-06 21:00:06,182 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/f2cf48315/2574eb3e8e124f9294cc3ff8310de276 [2021-12-06 21:00:06,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:00:06,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:00:06,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:00:06,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:00:06,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:00:06,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1f44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06, skipping insertion in model container [2021-12-06 21:00:06,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:00:06,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:00:06,321 WARN L230 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-12-06 21:00:06,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:00:06,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:00:06,347 WARN L230 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-12-06 21:00:06,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:00:06,359 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:00:06,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06 WrapperNode [2021-12-06 21:00:06,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:00:06,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:00:06,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:00:06,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:00:06,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,391 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-06 21:00:06,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:00:06,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:00:06,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:00:06,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:00:06,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:00:06,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:00:06,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:00:06,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:00:06,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (1/1) ... [2021-12-06 21:00:06,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:00:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:06,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:00:06,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:00:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:00:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:00:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:00:06,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:00:06,523 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:00:06,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:00:06,582 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:00:06,586 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:00:06,586 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 21:00:06,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:06 BoogieIcfgContainer [2021-12-06 21:00:06,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:00:06,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:00:06,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:00:06,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:00:06,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:00:06" (1/3) ... [2021-12-06 21:00:06,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cca49ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:00:06, skipping insertion in model container [2021-12-06 21:00:06,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:06" (2/3) ... [2021-12-06 21:00:06,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cca49ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:00:06, skipping insertion in model container [2021-12-06 21:00:06,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:06" (3/3) ... [2021-12-06 21:00:06,593 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-06 21:00:06,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:00:06,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:00:06,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:00:06,643 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 [2021-12-06 21:00:06,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:00:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:00:06,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:06,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:00:06,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-06 21:00:06,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:06,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327502224] [2021-12-06 21:00:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:06,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:06,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:06,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327502224] [2021-12-06 21:00:06,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327502224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:06,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:06,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:00:06,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942082779] [2021-12-06 21:00:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:06,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:00:06,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:06,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:00:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:00:06,827 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:06,837 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-06 21:00:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:00:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:00:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:06,846 INFO L225 Difference]: With dead ends: 21 [2021-12-06 21:00:06,846 INFO L226 Difference]: Without dead ends: 9 [2021-12-06 21:00:06,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:00:06,851 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:06,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-06 21:00:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-06 21:00:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-06 21:00:06,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-06 21:00:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:06,878 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-06 21:00:06,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-06 21:00:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:00:06,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:06,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:00:06,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:00:06,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:06,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-06 21:00:06,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:06,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062060911] [2021-12-06 21:00:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:06,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:06,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062060911] [2021-12-06 21:00:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062060911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:06,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:06,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293304468] [2021-12-06 21:00:06,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:06,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:06,924 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:06,933 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-06 21:00:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:00:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:06,934 INFO L225 Difference]: With dead ends: 16 [2021-12-06 21:00:06,934 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 21:00:06,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:06,936 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:06,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 21:00:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-06 21:00:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-06 21:00:06,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-06 21:00:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-06 21:00:06,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-06 21:00:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 21:00:06,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:06,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:06,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:00:06,940 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-06 21:00:06,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:06,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684331474] [2021-12-06 21:00:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:06,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:07,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:07,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684331474] [2021-12-06 21:00:07,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684331474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:00:07,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930697102] [2021-12-06 21:00:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:07,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:00:07,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:07,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:00:07,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:00:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:07,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:00:07,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:07,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:07,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930697102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:07,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:00:07,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 21:00:07,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779503794] [2021-12-06 21:00:07,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:07,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:00:07,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:00:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:00:07,128 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:07,166 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-06 21:00:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:00:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 21:00:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:07,168 INFO L225 Difference]: With dead ends: 23 [2021-12-06 21:00:07,168 INFO L226 Difference]: Without dead ends: 19 [2021-12-06 21:00:07,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:00:07,170 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:07,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-06 21:00:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-06 21:00:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-06 21:00:07,175 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-06 21:00:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:07,175 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-06 21:00:07,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-06 21:00:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:00:07,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:07,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:07,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:00:07,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:00:07,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-06 21:00:07,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:07,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764247345] [2021-12-06 21:00:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:07,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:07,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764247345] [2021-12-06 21:00:07,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764247345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:00:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324228914] [2021-12-06 21:00:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:00:07,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:00:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:07,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:00:07,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:00:07,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:00:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:00:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 21:00:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:07,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324228914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:07,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:00:07,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 21:00:07,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284659012] [2021-12-06 21:00:07,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:00:07,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:00:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:00:07,743 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:07,857 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-06 21:00:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:00:07,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 21:00:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:07,859 INFO L225 Difference]: With dead ends: 35 [2021-12-06 21:00:07,859 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 21:00:07,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:00:07,861 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:07,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 21:00:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 21:00:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-06 21:00:07,867 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-06 21:00:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:07,868 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-06 21:00:07,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-06 21:00:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:00:07,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:07,869 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:07,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 21:00:08,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 21:00:08,071 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:08,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-06 21:00:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:08,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167395461] [2021-12-06 21:00:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:08,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 21:00:08,160 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 21:00:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 21:00:08,220 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 21:00:08,220 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 21:00:08,221 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 21:00:08,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:00:08,225 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-12-06 21:00:08,227 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 21:00:08,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 09:00:08 BoogieIcfgContainer [2021-12-06 21:00:08,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 21:00:08,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 21:00:08,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 21:00:08,249 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 21:00:08,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:06" (3/4) ... [2021-12-06 21:00:08,251 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 21:00:08,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 21:00:08,252 INFO L158 Benchmark]: Toolchain (without parser) took 2067.23ms. Allocated memory is still 121.6MB. Free memory was 82.3MB in the beginning and 68.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,252 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 98.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:00:08,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.13ms. Allocated memory is still 121.6MB. Free memory was 82.2MB in the beginning and 96.8MB in the end (delta: -14.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,252 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.60ms. Allocated memory is still 121.6MB. Free memory was 96.8MB in the beginning and 95.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,252 INFO L158 Benchmark]: Boogie Preprocessor took 19.30ms. Allocated memory is still 121.6MB. Free memory was 95.2MB in the beginning and 94.7MB in the end (delta: 549.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:00:08,253 INFO L158 Benchmark]: RCFGBuilder took 175.14ms. Allocated memory is still 121.6MB. Free memory was 94.2MB in the beginning and 85.9MB in the end (delta: 8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,253 INFO L158 Benchmark]: TraceAbstraction took 1659.97ms. Allocated memory is still 121.6MB. Free memory was 85.3MB in the beginning and 69.4MB in the end (delta: 15.9MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-12-06 21:00:08,253 INFO L158 Benchmark]: Witness Printer took 2.70ms. Allocated memory is still 121.6MB. Free memory was 69.4MB in the beginning and 68.8MB in the end (delta: 590.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:00:08,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 98.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.13ms. Allocated memory is still 121.6MB. Free memory was 82.2MB in the beginning and 96.8MB in the end (delta: -14.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.60ms. Allocated memory is still 121.6MB. Free memory was 96.8MB in the beginning and 95.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.30ms. Allocated memory is still 121.6MB. Free memory was 95.2MB in the beginning and 94.7MB in the end (delta: 549.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 175.14ms. Allocated memory is still 121.6MB. Free memory was 94.2MB in the beginning and 85.9MB in the end (delta: 8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1659.97ms. Allocated memory is still 121.6MB. Free memory was 85.3MB in the beginning and 69.4MB in the end (delta: 15.9MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * Witness Printer took 2.70ms. Allocated memory is still 121.6MB. Free memory was 69.4MB in the beginning and 68.8MB in the end (delta: 590.1kB). There was no memory consumed. 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 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=0, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=1, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=2, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=3, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=4, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=5, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=7, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, y=0] [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 150 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 102 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91 IncrementalHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 48 mSDtfsCounter, 91 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 457 SizeOfPredicates, 2 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 21:00:08,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:00:09,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:00:09,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:00:09,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:00:09,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:00:09,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:00:09,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:00:09,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:00:09,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:00:09,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:00:09,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:00:09,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:00:09,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:00:09,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:00:09,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:00:09,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:00:09,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:00:09,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:00:09,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:00:09,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:00:09,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:00:09,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:00:09,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:00:09,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:00:09,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:00:09,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:00:09,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:00:09,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:00:09,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:00:09,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:00:09,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:00:09,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:00:09,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:00:09,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:00:09,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:00:09,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:00:09,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:00:09,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:00:09,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:00:09,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:00:09,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:00:09,871 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 21:00:09,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:00:09,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:00:09,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:00:09,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:00:09,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:00:09,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:00:09,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:00:09,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:00:09,892 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:00:09,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:00:09,893 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:00:09,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:00:09,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:00:09,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 21:00:09,895 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:00:09,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:00:09,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:00:09,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:00:09,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 21:00:09,896 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-06 21:00:10,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:00:10,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:00:10,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:00:10,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:00:10,151 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:00:10,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-06 21:00:10,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/ad6a0fda0/76b433069ccb4b3f91a1001b6cdc867e/FLAG3f4b6b1b9 [2021-12-06 21:00:10,595 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:00:10,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-06 21:00:10,601 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/ad6a0fda0/76b433069ccb4b3f91a1001b6cdc867e/FLAG3f4b6b1b9 [2021-12-06 21:00:10,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/data/ad6a0fda0/76b433069ccb4b3f91a1001b6cdc867e [2021-12-06 21:00:10,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:00:10,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:00:10,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:00:10,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:00:10,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:00:10,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56669e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10, skipping insertion in model container [2021-12-06 21:00:10,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:00:10,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:00:10,748 WARN L230 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-12-06 21:00:10,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:00:10,766 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:00:10,775 WARN L230 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_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-12-06 21:00:10,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:00:10,795 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:00:10,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10 WrapperNode [2021-12-06 21:00:10,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:00:10,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:00:10,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:00:10,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:00:10,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,823 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-06 21:00:10,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:00:10,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:00:10,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:00:10,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:00:10,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:00:10,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:00:10,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:00:10,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:00:10,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (1/1) ... [2021-12-06 21:00:10,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:00:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:10,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:00:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:00:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:00:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:00:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:00:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 21:00:10,943 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:00:10,944 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:00:11,006 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:00:11,010 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:00:11,010 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 21:00:11,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:11 BoogieIcfgContainer [2021-12-06 21:00:11,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:00:11,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:00:11,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:00:11,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:00:11,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:00:10" (1/3) ... [2021-12-06 21:00:11,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2f7400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:00:11, skipping insertion in model container [2021-12-06 21:00:11,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:00:10" (2/3) ... [2021-12-06 21:00:11,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2f7400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:00:11, skipping insertion in model container [2021-12-06 21:00:11,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:00:11" (3/3) ... [2021-12-06 21:00:11,018 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-06 21:00:11,021 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:00:11,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:00:11,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:00:11,061 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 [2021-12-06 21:00:11,061 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:00:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:00:11,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:11,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:00:11,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-06 21:00:11,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:00:11,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417536497] [2021-12-06 21:00:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:11,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:00:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:00:11,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:00:11,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 21:00:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:11,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 21:00:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:11,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:00:11,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:00:11,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417536497] [2021-12-06 21:00:11,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417536497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:11,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:11,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:00:11,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125871892] [2021-12-06 21:00:11,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:11,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:00:11,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:00:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:00:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:00:11,211 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:11,226 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-06 21:00:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:00:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:00:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:11,235 INFO L225 Difference]: With dead ends: 21 [2021-12-06 21:00:11,236 INFO L226 Difference]: Without dead ends: 9 [2021-12-06 21:00:11,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:00:11,242 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:11,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-06 21:00:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-06 21:00:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-06 21:00:11,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-06 21:00:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:11,270 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-06 21:00:11,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-06 21:00:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:00:11,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:11,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:00:11,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:00:11,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:00:11,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-06 21:00:11,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:00:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726624873] [2021-12-06 21:00:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:11,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:00:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:00:11,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:00:11,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 21:00:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:00:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:11,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:00:11,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:00:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726624873] [2021-12-06 21:00:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726624873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:11,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:11,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:11,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742870853] [2021-12-06 21:00:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:00:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:11,540 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:11,550 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-06 21:00:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:00:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:11,551 INFO L225 Difference]: With dead ends: 16 [2021-12-06 21:00:11,551 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 21:00:11,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:11,553 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:11,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 21:00:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-06 21:00:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-06 21:00:11,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-06 21:00:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:11,556 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-06 21:00:11,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-06 21:00:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 21:00:11,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:11,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:11,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 21:00:11,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:00:11,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-06 21:00:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:00:11,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122692245] [2021-12-06 21:00:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:11,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:00:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:00:11,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:00:11,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 21:00:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:11,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:00:11,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:11,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:11,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:00:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122692245] [2021-12-06 21:00:11,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122692245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:11,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:00:11,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 21:00:11,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473917225] [2021-12-06 21:00:11,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:11,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:00:11,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:00:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:00:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:00:11,918 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:11,956 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-06 21:00:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:00:11,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 21:00:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:11,957 INFO L225 Difference]: With dead ends: 23 [2021-12-06 21:00:11,957 INFO L226 Difference]: Without dead ends: 19 [2021-12-06 21:00:11,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:00:11,959 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:11,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-06 21:00:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-06 21:00:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-06 21:00:11,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-06 21:00:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:11,966 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-06 21:00:11,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-06 21:00:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:00:11,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:11,967 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:11,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 21:00:12,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:00:12,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-06 21:00:12,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:00:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759952339] [2021-12-06 21:00:12,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:00:12,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:00:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:00:12,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:00:12,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 21:00:12,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:00:12,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:00:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:00:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:12,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:00:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759952339] [2021-12-06 21:00:12,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759952339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:12,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:00:12,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 21:00:12,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894335445] [2021-12-06 21:00:12,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:12,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:00:12,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:00:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:00:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:00:12,400 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:12,467 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-06 21:00:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:00:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 21:00:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:12,469 INFO L225 Difference]: With dead ends: 35 [2021-12-06 21:00:12,469 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 21:00:12,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:00:12,471 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:12,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 21:00:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 21:00:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-06 21:00:12,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-06 21:00:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:12,479 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-06 21:00:12,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-06 21:00:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:00:12,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:12,481 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:12,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 21:00:12,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:00:12,683 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:12,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-06 21:00:12,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:00:12,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261117583] [2021-12-06 21:00:12,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:00:12,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:00:12,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:00:12,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:00:12,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 21:00:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 21:00:12,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:00:12,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 21:00:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:18,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:00:18,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261117583] [2021-12-06 21:00:18,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261117583] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:18,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:00:18,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-12-06 21:00:18,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653475778] [2021-12-06 21:00:18,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:18,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 21:00:18,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:00:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 21:00:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 21:00:18,574 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:24,458 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-06 21:00:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 21:00:24,458 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:00:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:24,459 INFO L225 Difference]: With dead ends: 96 [2021-12-06 21:00:24,459 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 21:00:24,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1669, Invalid=5813, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 21:00:24,463 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:24,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 165 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2021-12-06 21:00:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 21:00:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2021-12-06 21:00:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-12-06 21:00:24,471 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2021-12-06 21:00:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:24,471 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-12-06 21:00:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-12-06 21:00:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:00:24,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:24,473 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:24,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 21:00:24,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:00:24,674 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-12-06 21:00:24,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:00:24,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346359343] [2021-12-06 21:00:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:24,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:00:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:00:24,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:00:24,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 21:00:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:24,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 21:00:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:25,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:00:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:28,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:00:28,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346359343] [2021-12-06 21:00:28,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346359343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:00:28,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:00:28,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:00:28,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537227137] [2021-12-06 21:00:28,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:00:28,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:00:28,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:00:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:00:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:00:28,388 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:05,887 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2021-12-06 21:01:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-06 21:01:05,887 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:01:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:05,890 INFO L225 Difference]: With dead ends: 319 [2021-12-06 21:01:05,890 INFO L226 Difference]: Without dead ends: 285 [2021-12-06 21:01:05,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2021-12-06 21:01:05,904 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 277 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:05,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 115 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1598 Invalid, 0 Unknown, 136 Unchecked, 2.3s Time] [2021-12-06 21:01:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-06 21:01:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-12-06 21:01:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-12-06 21:01:05,926 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2021-12-06 21:01:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:05,926 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-12-06 21:01:05,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-12-06 21:01:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:01:05,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:05,928 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:01:05,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 21:01:06,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:01:06,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:06,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-12-06 21:01:06,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:01:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704244561] [2021-12-06 21:01:06,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:01:06,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:01:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:01:06,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:01:06,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 21:01:06,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:01:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:01:06,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 21:01:06,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:06,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:01:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:10,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:01:10,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704244561] [2021-12-06 21:01:10,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704244561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:01:10,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:01:10,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:01:10,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210487706] [2021-12-06 21:01:10,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:01:10,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:01:10,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:01:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:01:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:01:10,047 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:47,792 INFO L93 Difference]: Finished difference Result 395 states and 511 transitions. [2021-12-06 21:01:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-12-06 21:01:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:01:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:47,794 INFO L225 Difference]: With dead ends: 395 [2021-12-06 21:01:47,794 INFO L226 Difference]: Without dead ends: 338 [2021-12-06 21:01:47,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13552 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=5749, Invalid=34451, Unknown=0, NotChecked=0, Total=40200 [2021-12-06 21:01:47,798 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 277 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:47,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 134 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1687 Invalid, 0 Unknown, 105 Unchecked, 2.0s Time] [2021-12-06 21:01:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-06 21:01:47,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 184. [2021-12-06 21:01:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2021-12-06 21:01:47,819 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 30 [2021-12-06 21:01:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:47,820 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2021-12-06 21:01:47,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:01:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2021-12-06 21:01:47,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:01:47,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:47,821 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:01:47,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 21:01:48,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:01:48,023 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:48,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-12-06 21:01:48,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:01:48,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925024499] [2021-12-06 21:01:48,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:01:48,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:01:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:01:48,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:01:48,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 21:01:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 21:01:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:01:48,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:01:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:01:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:01:54,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:01:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925024499] [2021-12-06 21:01:54,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925024499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:01:54,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:01:54,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:01:54,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739023477] [2021-12-06 21:01:54,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:01:54,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:01:54,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:01:54,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:01:54,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:01:54,246 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:01,995 INFO L93 Difference]: Finished difference Result 409 states and 537 transitions. [2021-12-06 21:02:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 21:02:01,995 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:02:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:01,998 INFO L225 Difference]: With dead ends: 409 [2021-12-06 21:02:01,998 INFO L226 Difference]: Without dead ends: 403 [2021-12-06 21:02:01,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 21:02:02,000 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:02,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 69 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 178 Invalid, 0 Unknown, 419 Unchecked, 0.2s Time] [2021-12-06 21:02:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-06 21:02:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 263. [2021-12-06 21:02:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 262 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2021-12-06 21:02:02,039 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 30 [2021-12-06 21:02:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:02,040 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2021-12-06 21:02:02,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2021-12-06 21:02:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:02:02,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:02,042 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:02:02,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 21:02:02,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:02:02,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:02:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:02:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-12-06 21:02:02,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:02:02,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242798183] [2021-12-06 21:02:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:02:02,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:02:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:02:02,249 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:02:02,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 21:02:02,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:02:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:02:02,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 21:02:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:02:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:02:03,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:02:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:02:06,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:02:06,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242798183] [2021-12-06 21:02:06,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242798183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:02:06,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:02:06,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:02:06,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320227603] [2021-12-06 21:02:06,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:02:06,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:02:06,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:02:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:02:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:02:06,163 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:59,807 INFO L93 Difference]: Finished difference Result 587 states and 774 transitions. [2021-12-06 21:02:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-06 21:02:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:02:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:59,811 INFO L225 Difference]: With dead ends: 587 [2021-12-06 21:02:59,811 INFO L226 Difference]: Without dead ends: 565 [2021-12-06 21:02:59,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20028 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=8138, Invalid=49222, Unknown=0, NotChecked=0, Total=57360 [2021-12-06 21:02:59,816 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:59,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 145 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1810 Invalid, 0 Unknown, 127 Unchecked, 2.7s Time] [2021-12-06 21:02:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-06 21:02:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 382. [2021-12-06 21:02:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 381 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 518 transitions. [2021-12-06 21:02:59,866 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 518 transitions. Word has length 30 [2021-12-06 21:02:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:02:59,866 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 518 transitions. [2021-12-06 21:02:59,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:02:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 518 transitions. [2021-12-06 21:02:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:02:59,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:02:59,867 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:02:59,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 21:03:00,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:03:00,069 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-12-06 21:03:00,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:03:00,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775837367] [2021-12-06 21:03:00,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:03:00,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:03:00,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:03:00,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:03:00,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 21:03:00,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 21:03:00,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:03:00,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:03:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:03:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:03:01,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:03:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:03:04,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:03:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775837367] [2021-12-06 21:03:04,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775837367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:03:04,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:03:04,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:03:04,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251953805] [2021-12-06 21:03:04,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:03:04,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:03:04,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:03:04,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:03:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:03:04,436 INFO L87 Difference]: Start difference. First operand 382 states and 518 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:40,885 INFO L93 Difference]: Finished difference Result 620 states and 831 transitions. [2021-12-06 21:03:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-06 21:03:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:03:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:40,889 INFO L225 Difference]: With dead ends: 620 [2021-12-06 21:03:40,889 INFO L226 Difference]: Without dead ends: 579 [2021-12-06 21:03:40,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8553 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=4227, Invalid=24503, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 21:03:40,891 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:40,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 80 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1659 Invalid, 0 Unknown, 93 Unchecked, 2.1s Time] [2021-12-06 21:03:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-06 21:03:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 428. [2021-12-06 21:03:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.3559718969555035) internal successors, (579), 427 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 579 transitions. [2021-12-06 21:03:40,947 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 579 transitions. Word has length 30 [2021-12-06 21:03:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 579 transitions. [2021-12-06 21:03:40,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 579 transitions. [2021-12-06 21:03:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:03:40,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:40,949 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:03:40,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 21:03:41,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:03:41,150 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-12-06 21:03:41,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:03:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043057934] [2021-12-06 21:03:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:03:41,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:03:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:03:41,156 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:03:41,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 21:03:41,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 21:03:41,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:03:41,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 21:03:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:03:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:03:42,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:03:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:03:47,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:03:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043057934] [2021-12-06 21:03:47,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043057934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:03:47,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:03:47,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:03:47,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017757112] [2021-12-06 21:03:47,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:03:47,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:03:47,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:03:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:03:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:03:47,097 INFO L87 Difference]: Start difference. First operand 428 states and 579 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:03:54,274 INFO L93 Difference]: Finished difference Result 623 states and 844 transitions. [2021-12-06 21:03:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 21:03:54,274 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:03:54,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:03:54,277 INFO L225 Difference]: With dead ends: 623 [2021-12-06 21:03:54,277 INFO L226 Difference]: Without dead ends: 617 [2021-12-06 21:03:54,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=895, Invalid=6415, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 21:03:54,278 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:03:54,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 89 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 243 Unchecked, 0.1s Time] [2021-12-06 21:03:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-06 21:03:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 550. [2021-12-06 21:03:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.3734061930783241) internal successors, (754), 549 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 754 transitions. [2021-12-06 21:03:54,360 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 754 transitions. Word has length 30 [2021-12-06 21:03:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:03:54,360 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 754 transitions. [2021-12-06 21:03:54,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:03:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 754 transitions. [2021-12-06 21:03:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:03:54,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:03:54,361 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:03:54,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-06 21:03:54,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:03:54,563 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:03:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:03:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-12-06 21:03:54,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:03:54,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172928478] [2021-12-06 21:03:54,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:03:54,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:03:54,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:03:54,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:03:54,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 21:03:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:03:54,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 21:03:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:03:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:03:55,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:03:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:03:58,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:03:58,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172928478] [2021-12-06 21:03:58,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172928478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:03:58,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:03:58,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:03:58,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795037898] [2021-12-06 21:03:58,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:03:58,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:03:58,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:03:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:03:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:03:58,652 INFO L87 Difference]: Start difference. First operand 550 states and 754 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:04:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:04:21,300 INFO L93 Difference]: Finished difference Result 776 states and 1047 transitions. [2021-12-06 21:04:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-12-06 21:04:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:04:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:04:21,305 INFO L225 Difference]: With dead ends: 776 [2021-12-06 21:04:21,305 INFO L226 Difference]: Without dead ends: 762 [2021-12-06 21:04:21,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7734 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=2487, Invalid=22635, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 21:04:21,308 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:04:21,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1385 Invalid, 0 Unknown, 100 Unchecked, 1.7s Time] [2021-12-06 21:04:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-12-06 21:04:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 640. [2021-12-06 21:04:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.3708920187793427) internal successors, (876), 639 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:04:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2021-12-06 21:04:21,402 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 30 [2021-12-06 21:04:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:04:21,402 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2021-12-06 21:04:21,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:04:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2021-12-06 21:04:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:04:21,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:04:21,403 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:04:21,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 21:04:21,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:04:21,604 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:04:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:04:21,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2021-12-06 21:04:21,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:04:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715668526] [2021-12-06 21:04:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:04:21,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:04:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:04:21,605 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:04:21,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 21:04:21,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:04:21,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:04:21,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 21:04:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:04:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:04:22,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:04:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:04:25,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:04:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715668526] [2021-12-06 21:04:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715668526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:04:25,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:04:25,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:04:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937089264] [2021-12-06 21:04:25,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:04:25,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:04:25,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:04:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:04:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:04:25,711 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:05:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:05:03,201 INFO L93 Difference]: Finished difference Result 866 states and 1165 transitions. [2021-12-06 21:05:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 21:05:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:05:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:05:03,205 INFO L225 Difference]: With dead ends: 866 [2021-12-06 21:05:03,205 INFO L226 Difference]: Without dead ends: 831 [2021-12-06 21:05:03,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10070 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=4419, Invalid=28161, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 21:05:03,207 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:05:03,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1661 Invalid, 0 Unknown, 88 Unchecked, 2.2s Time] [2021-12-06 21:05:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-06 21:05:03,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 681. [2021-12-06 21:05:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3691176470588236) internal successors, (931), 680 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:05:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 931 transitions. [2021-12-06 21:05:03,307 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 931 transitions. Word has length 30 [2021-12-06 21:05:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:05:03,308 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 931 transitions. [2021-12-06 21:05:03,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:05:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 931 transitions. [2021-12-06 21:05:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:05:03,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:05:03,309 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:05:03,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 21:05:03,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:05:03,509 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:05:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:05:03,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2021-12-06 21:05:03,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:05:03,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178744417] [2021-12-06 21:05:03,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:05:03,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:05:03,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:05:03,511 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:05:03,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 21:05:03,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 21:05:03,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:05:03,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 21:05:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:05:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:05:05,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:05:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:05:10,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:05:10,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178744417] [2021-12-06 21:05:10,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178744417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:05:10,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:05:10,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:05:10,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453235234] [2021-12-06 21:05:10,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:05:10,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:05:10,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:05:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:05:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2401, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:05:10,417 INFO L87 Difference]: Start difference. First operand 681 states and 931 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:05:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:05:20,283 INFO L93 Difference]: Finished difference Result 1022 states and 1381 transitions. [2021-12-06 21:05:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 21:05:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:05:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:05:20,288 INFO L225 Difference]: With dead ends: 1022 [2021-12-06 21:05:20,288 INFO L226 Difference]: Without dead ends: 1016 [2021-12-06 21:05:20,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1687, Invalid=9025, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 21:05:20,289 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:05:20,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 159 Invalid, 0 Unknown, 306 Unchecked, 0.2s Time] [2021-12-06 21:05:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-12-06 21:05:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 866. [2021-12-06 21:05:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.3745664739884393) internal successors, (1189), 865 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:05:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1189 transitions. [2021-12-06 21:05:20,428 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1189 transitions. Word has length 30 [2021-12-06 21:05:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:05:20,428 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1189 transitions. [2021-12-06 21:05:20,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:05:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1189 transitions. [2021-12-06 21:05:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:05:20,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:05:20,429 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 21:05:20,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 21:05:20,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:05:20,631 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:05:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:05:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2021-12-06 21:05:20,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:05:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966874126] [2021-12-06 21:05:20,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:05:20,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:05:20,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:05:20,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:05:20,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 21:05:20,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:05:20,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:05:20,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 21:05:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:05:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:05:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:05:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:05:25,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:05:25,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966874126] [2021-12-06 21:05:25,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966874126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:05:25,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:05:25,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:05:25,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309602131] [2021-12-06 21:05:25,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:05:25,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:05:25,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:05:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:05:25,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:05:25,242 INFO L87 Difference]: Start difference. First operand 866 states and 1189 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:06:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:06:16,167 INFO L93 Difference]: Finished difference Result 1142 states and 1552 transitions. [2021-12-06 21:06:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-06 21:06:16,169 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:06:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:06:16,173 INFO L225 Difference]: With dead ends: 1142 [2021-12-06 21:06:16,173 INFO L226 Difference]: Without dead ends: 1120 [2021-12-06 21:06:16,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12469 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=6080, Invalid=33322, Unknown=0, NotChecked=0, Total=39402 [2021-12-06 21:06:16,175 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:06:16,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 163 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2128 Invalid, 0 Unknown, 131 Unchecked, 3.2s Time] [2021-12-06 21:06:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-12-06 21:06:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 937. [2021-12-06 21:06:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.3803418803418803) internal successors, (1292), 936 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:06:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1292 transitions. [2021-12-06 21:06:16,324 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1292 transitions. Word has length 30 [2021-12-06 21:06:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:06:16,325 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1292 transitions. [2021-12-06 21:06:16,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:06:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1292 transitions. [2021-12-06 21:06:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:06:16,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:06:16,326 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:06:16,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 21:06:16,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:06:16,527 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:06:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:06:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 216357974, now seen corresponding path program 11 times [2021-12-06 21:06:16,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:06:16,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556619599] [2021-12-06 21:06:16,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:06:16,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:06:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:06:16,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:06:16,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 21:06:16,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 21:06:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:06:16,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:06:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:06:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:06:17,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:06:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:06:20,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:06:20,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556619599] [2021-12-06 21:06:20,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556619599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:06:20,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:06:20,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:06:20,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819679608] [2021-12-06 21:06:20,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:06:20,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:06:20,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:06:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:06:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:06:20,739 INFO L87 Difference]: Start difference. First operand 937 states and 1292 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:05,157 INFO L93 Difference]: Finished difference Result 1274 states and 1751 transitions. [2021-12-06 21:07:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-12-06 21:07:05,159 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:07:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:05,163 INFO L225 Difference]: With dead ends: 1274 [2021-12-06 21:07:05,163 INFO L226 Difference]: Without dead ends: 1247 [2021-12-06 21:07:05,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12700 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=4921, Invalid=34879, Unknown=0, NotChecked=0, Total=39800 [2021-12-06 21:07:05,166 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:05,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 86 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2177 Invalid, 0 Unknown, 53 Unchecked, 2.7s Time] [2021-12-06 21:07:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-12-06 21:07:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1050. [2021-12-06 21:07:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.3775023832221163) internal successors, (1445), 1049 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1445 transitions. [2021-12-06 21:07:05,332 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1445 transitions. Word has length 30 [2021-12-06 21:07:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:05,332 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1445 transitions. [2021-12-06 21:07:05,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1445 transitions. [2021-12-06 21:07:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:07:05,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:05,333 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:05,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 21:07:05,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:07:05,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -406442094, now seen corresponding path program 12 times [2021-12-06 21:07:05,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:07:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871923055] [2021-12-06 21:07:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:07:05,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:07:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:07:05,540 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:07:05,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 21:07:05,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 21:07:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:07:05,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 21:07:05,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:07:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:07,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:07:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:11,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:07:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871923055] [2021-12-06 21:07:11,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871923055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:07:11,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:07:11,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:07:11,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920615790] [2021-12-06 21:07:11,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:07:11,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:07:11,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:07:11,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:07:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:07:11,462 INFO L87 Difference]: Start difference. First operand 1050 states and 1445 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:37,062 INFO L93 Difference]: Finished difference Result 1256 states and 1720 transitions. [2021-12-06 21:07:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 21:07:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:07:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:37,067 INFO L225 Difference]: With dead ends: 1256 [2021-12-06 21:07:37,067 INFO L226 Difference]: Without dead ends: 1250 [2021-12-06 21:07:37,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=2341, Invalid=11939, Unknown=0, NotChecked=0, Total=14280 [2021-12-06 21:07:37,068 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:37,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 77 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 434 Invalid, 0 Unknown, 1132 Unchecked, 0.3s Time] [2021-12-06 21:07:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-12-06 21:07:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1191. [2021-12-06 21:07:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.377310924369748) internal successors, (1639), 1190 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1639 transitions. [2021-12-06 21:07:37,265 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1639 transitions. Word has length 30 [2021-12-06 21:07:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:37,265 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1639 transitions. [2021-12-06 21:07:37,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1639 transitions. [2021-12-06 21:07:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:07:37,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:37,267 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:37,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-06 21:07:37,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:07:37,468 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash -463700396, now seen corresponding path program 13 times [2021-12-06 21:07:37,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:07:37,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005658214] [2021-12-06 21:07:37,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:07:37,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:07:37,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:07:37,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:07:37,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 21:07:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:07:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:07:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:38,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:07:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:41,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:07:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005658214] [2021-12-06 21:07:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005658214] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:07:41,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:07:41,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:07:41,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207072898] [2021-12-06 21:07:41,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:07:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:07:41,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:07:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:07:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:07:41,846 INFO L87 Difference]: Start difference. First operand 1191 states and 1639 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:39,462 INFO L93 Difference]: Finished difference Result 1605 states and 2179 transitions. [2021-12-06 21:08:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-06 21:08:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:08:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:39,468 INFO L225 Difference]: With dead ends: 1605 [2021-12-06 21:08:39,468 INFO L226 Difference]: Without dead ends: 1583 [2021-12-06 21:08:39,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18248 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=6948, Invalid=46182, Unknown=0, NotChecked=0, Total=53130 [2021-12-06 21:08:39,472 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 229 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:39,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 177 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2059 Invalid, 0 Unknown, 132 Unchecked, 3.1s Time] [2021-12-06 21:08:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-12-06 21:08:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1323. [2021-12-06 21:08:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.3789712556732223) internal successors, (1823), 1322 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1823 transitions. [2021-12-06 21:08:39,706 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1823 transitions. Word has length 30 [2021-12-06 21:08:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:39,706 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1823 transitions. [2021-12-06 21:08:39,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1823 transitions. [2021-12-06 21:08:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:08:39,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:39,707 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:39,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 21:08:39,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:08:39,909 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:39,910 INFO L85 PathProgramCache]: Analyzing trace with hash -41807464, now seen corresponding path program 14 times [2021-12-06 21:08:39,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:08:39,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780486762] [2021-12-06 21:08:39,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:08:39,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:08:39,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:08:39,914 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:08:39,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 21:08:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:08:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:08:39,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:08:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:08:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:40,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:08:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:44,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:08:44,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780486762] [2021-12-06 21:08:44,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780486762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:08:44,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:08:44,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:08:44,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936939559] [2021-12-06 21:08:44,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:08:44,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:08:44,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:08:44,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:08:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2260, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:08:44,376 INFO L87 Difference]: Start difference. First operand 1323 states and 1823 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:35,449 INFO L93 Difference]: Finished difference Result 1653 states and 2253 transitions. [2021-12-06 21:09:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-12-06 21:09:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:09:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:35,456 INFO L225 Difference]: With dead ends: 1653 [2021-12-06 21:09:35,457 INFO L226 Difference]: Without dead ends: 1635 [2021-12-06 21:09:35,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14811 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=6460, Invalid=39122, Unknown=0, NotChecked=0, Total=45582 [2021-12-06 21:09:35,459 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 234 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 123 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2108 Invalid, 0 Unknown, 120 Unchecked, 3.0s Time] [2021-12-06 21:09:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-12-06 21:09:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1384. [2021-12-06 21:09:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3796095444685466) internal successors, (1908), 1383 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1908 transitions. [2021-12-06 21:09:35,695 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1908 transitions. Word has length 30 [2021-12-06 21:09:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:35,696 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1908 transitions. [2021-12-06 21:09:35,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1908 transitions. [2021-12-06 21:09:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:09:35,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:35,696 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:35,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 21:09:35,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:09:35,898 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -664607532, now seen corresponding path program 15 times [2021-12-06 21:09:35,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:09:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002957321] [2021-12-06 21:09:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:09:35,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:09:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:09:35,903 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:09:35,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 21:09:35,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 21:09:35,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:09:35,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 21:09:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:38,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:09:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:42,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:09:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002957321] [2021-12-06 21:09:42,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002957321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:09:42,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:09:42,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:09:42,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584542329] [2021-12-06 21:09:42,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:09:42,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:09:42,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:09:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:09:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2411, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:09:42,736 INFO L87 Difference]: Start difference. First operand 1384 states and 1908 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:03,316 INFO L93 Difference]: Finished difference Result 1973 states and 2695 transitions. [2021-12-06 21:10:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 21:10:03,316 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:10:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:03,323 INFO L225 Difference]: With dead ends: 1973 [2021-12-06 21:10:03,323 INFO L226 Difference]: Without dead ends: 1967 [2021-12-06 21:10:03,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4930 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=2818, Invalid=14212, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 21:10:03,324 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 143 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:03,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 85 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 283 Invalid, 0 Unknown, 836 Unchecked, 0.4s Time] [2021-12-06 21:10:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-06 21:10:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1646. [2021-12-06 21:10:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 1.3829787234042554) internal successors, (2275), 1645 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2275 transitions. [2021-12-06 21:10:03,621 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2275 transitions. Word has length 30 [2021-12-06 21:10:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:03,621 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 2275 transitions. [2021-12-06 21:10:03,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2275 transitions. [2021-12-06 21:10:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:10:03,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:03,622 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:03,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 21:10:03,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:03,823 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -721865834, now seen corresponding path program 16 times [2021-12-06 21:10:03,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717608133] [2021-12-06 21:10:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:10:03,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:03,828 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:03,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 21:10:03,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:10:03,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:03,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 21:10:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:04,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717608133] [2021-12-06 21:10:08,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717608133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:08,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:08,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:10:08,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143313927] [2021-12-06 21:10:08,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:10:08,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:10:08,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:10:08,619 INFO L87 Difference]: Start difference. First operand 1646 states and 2275 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:02,998 INFO L93 Difference]: Finished difference Result 2062 states and 2814 transitions. [2021-12-06 21:11:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-12-06 21:11:02,999 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:11:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:03,006 INFO L225 Difference]: With dead ends: 2062 [2021-12-06 21:11:03,006 INFO L226 Difference]: Without dead ends: 2046 [2021-12-06 21:11:03,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12319 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=5623, Invalid=33779, Unknown=0, NotChecked=0, Total=39402 [2021-12-06 21:11:03,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 199 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:03,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 209 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 2554 Invalid, 0 Unknown, 121 Unchecked, 3.5s Time] [2021-12-06 21:11:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-12-06 21:11:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1731. [2021-12-06 21:11:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 1.3826589595375722) internal successors, (2392), 1730 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2392 transitions. [2021-12-06 21:11:03,330 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2392 transitions. Word has length 30 [2021-12-06 21:11:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:03,330 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2392 transitions. [2021-12-06 21:11:03,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2392 transitions. [2021-12-06 21:11:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:11:03,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:03,331 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:03,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 21:11:03,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:11:03,532 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1553479954, now seen corresponding path program 17 times [2021-12-06 21:11:03,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:11:03,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033000815] [2021-12-06 21:11:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:11:03,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:11:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:11:03,537 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:11:03,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 21:11:03,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 21:11:03,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:03,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:11:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:11:04,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:11:07,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:11:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033000815] [2021-12-06 21:11:07,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033000815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:07,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:11:07,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:11:07,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046827608] [2021-12-06 21:11:07,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:07,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:11:07,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:11:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:11:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:11:07,764 INFO L87 Difference]: Start difference. First operand 1731 states and 2392 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:39,363 INFO L93 Difference]: Finished difference Result 1965 states and 2701 transitions. [2021-12-06 21:11:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 21:11:39,364 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:11:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:39,371 INFO L225 Difference]: With dead ends: 1965 [2021-12-06 21:11:39,371 INFO L226 Difference]: Without dead ends: 1937 [2021-12-06 21:11:39,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6672 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=3568, Invalid=19994, Unknown=0, NotChecked=0, Total=23562 [2021-12-06 21:11:39,375 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 193 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:39,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 66 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1636 Invalid, 0 Unknown, 100 Unchecked, 2.3s Time] [2021-12-06 21:11:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-06 21:11:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1785. [2021-12-06 21:11:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 1.3800448430493273) internal successors, (2462), 1784 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2462 transitions. [2021-12-06 21:11:39,698 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2462 transitions. Word has length 30 [2021-12-06 21:11:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:39,698 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 2462 transitions. [2021-12-06 21:11:39,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2462 transitions. [2021-12-06 21:11:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:11:39,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:39,699 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:39,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 21:11:39,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:11:39,901 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:11:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1496221652, now seen corresponding path program 18 times [2021-12-06 21:11:39,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:11:39,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852341235] [2021-12-06 21:11:39,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:11:39,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:11:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:11:39,906 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:11:39,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 21:11:39,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 21:11:39,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:39,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 21:11:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:11:41,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:11:45,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:11:45,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852341235] [2021-12-06 21:11:45,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852341235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:45,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:11:45,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:11:45,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169049193] [2021-12-06 21:11:45,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:45,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:11:45,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:11:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:11:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2448, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:11:45,858 INFO L87 Difference]: Start difference. First operand 1785 states and 2462 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:12:01,221 INFO L93 Difference]: Finished difference Result 1953 states and 2679 transitions. [2021-12-06 21:12:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 21:12:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:12:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:12:01,228 INFO L225 Difference]: With dead ends: 1953 [2021-12-06 21:12:01,228 INFO L226 Difference]: Without dead ends: 1947 [2021-12-06 21:12:01,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1436, Invalid=9070, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 21:12:01,229 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 103 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:12:01,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 76 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 224 Invalid, 0 Unknown, 683 Unchecked, 0.1s Time] [2021-12-06 21:12:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-12-06 21:12:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1884. [2021-12-06 21:12:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.3786510886882635) internal successors, (2596), 1883 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2596 transitions. [2021-12-06 21:12:01,572 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2596 transitions. Word has length 30 [2021-12-06 21:12:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:12:01,572 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 2596 transitions. [2021-12-06 21:12:01,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2596 transitions. [2021-12-06 21:12:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:12:01,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:12:01,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:12:01,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 21:12:01,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:12:01,775 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:12:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:12:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash 873421584, now seen corresponding path program 19 times [2021-12-06 21:12:01,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:12:01,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579744407] [2021-12-06 21:12:01,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:12:01,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:12:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:12:01,780 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:12:01,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 21:12:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:01,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:12:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:06,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:12:06,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579744407] [2021-12-06 21:12:06,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579744407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:06,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:12:06,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:12:06,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700893043] [2021-12-06 21:12:06,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:06,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:12:06,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:12:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:12:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2287, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:12:06,272 INFO L87 Difference]: Start difference. First operand 1884 states and 2596 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:12:51,432 INFO L93 Difference]: Finished difference Result 2149 states and 2927 transitions. [2021-12-06 21:12:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-12-06 21:12:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:12:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:12:51,441 INFO L225 Difference]: With dead ends: 2149 [2021-12-06 21:12:51,441 INFO L226 Difference]: Without dead ends: 2093 [2021-12-06 21:12:51,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10554 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=4333, Invalid=30077, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 21:12:51,443 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 195 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:12:51,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 78 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1958 Invalid, 0 Unknown, 105 Unchecked, 2.6s Time] [2021-12-06 21:12:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-12-06 21:12:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1890. [2021-12-06 21:12:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 1.3758602435150873) internal successors, (2599), 1889 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2599 transitions. [2021-12-06 21:12:51,798 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2599 transitions. Word has length 30 [2021-12-06 21:12:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:12:51,799 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 2599 transitions. [2021-12-06 21:12:51,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2599 transitions. [2021-12-06 21:12:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:12:51,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:12:51,800 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 21:12:51,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 21:12:52,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:12:52,002 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:12:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:12:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash 557997844, now seen corresponding path program 20 times [2021-12-06 21:12:52,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:12:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207266529] [2021-12-06 21:12:52,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:12:52,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:12:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:12:52,007 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:12:52,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 21:12:52,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:12:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:12:52,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 21:12:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:52,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:57,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:12:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207266529] [2021-12-06 21:12:57,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207266529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:57,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:12:57,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-06 21:12:57,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809477216] [2021-12-06 21:12:57,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:57,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 21:12:57,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:12:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 21:12:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:12:57,092 INFO L87 Difference]: Start difference. First operand 1890 states and 2599 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:13:48,430 INFO L93 Difference]: Finished difference Result 2231 states and 3035 transitions. [2021-12-06 21:13:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-12-06 21:13:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 21:13:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:13:48,437 INFO L225 Difference]: With dead ends: 2231 [2021-12-06 21:13:48,437 INFO L226 Difference]: Without dead ends: 2213 [2021-12-06 21:13:48,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9787 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=5262, Invalid=27680, Unknown=0, NotChecked=0, Total=32942 [2021-12-06 21:13:48,439 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:13:48,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 144 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2332 Invalid, 0 Unknown, 124 Unchecked, 3.6s Time] [2021-12-06 21:13:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-12-06 21:13:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1917. [2021-12-06 21:13:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 1.3752609603340293) internal successors, (2635), 1916 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2635 transitions. [2021-12-06 21:13:48,796 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2635 transitions. Word has length 30 [2021-12-06 21:13:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:13:48,796 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2635 transitions. [2021-12-06 21:13:48,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2635 transitions. [2021-12-06 21:13:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:13:48,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:13:48,797 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:13:48,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 21:13:48,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:13:48,999 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:13:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2143230256, now seen corresponding path program 21 times [2021-12-06 21:13:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:13:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221177766] [2021-12-06 21:13:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:13:49,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:13:49,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:13:49,004 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:13:49,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efc3018-26c6-4a51-9fb6-f01a255ef5b4/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 21:13:49,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 21:13:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:13:49,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:13:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:13:51,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:13:55,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:13:55,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221177766] [2021-12-06 21:13:55,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221177766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:13:55,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:13:55,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-06 21:13:55,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017497150] [2021-12-06 21:13:55,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:13:55,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 21:13:55,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:13:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 21:13:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:13:55,377 INFO L87 Difference]: Start difference. First operand 1917 states and 2635 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)