./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G --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 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:55:18,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:55:18,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:55:18,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:55:18,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:55:18,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:55:18,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:55:18,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:55:18,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:55:18,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:55:18,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:55:18,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:55:18,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:55:18,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:55:18,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:55:18,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:55:18,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:55:18,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:55:18,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:55:18,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:55:18,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:55:18,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:55:18,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:55:18,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:55:18,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:55:18,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:55:18,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:55:18,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:55:18,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:55:18,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:55:18,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:55:18,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:55:18,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:55:18,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:55:18,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:55:18,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:55:18,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:55:18,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:55:18,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:55:18,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:55:18,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:55:18,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:55:18,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:55:18,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:55:18,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:55:18,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:55:18,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:55:18,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:55:18,543 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:55:18,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:55:18,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:55:18,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:55:18,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:55:18,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:55:18,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:55:18,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:55:18,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:55:18,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:55:18,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:55:18,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:55:18,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:55:18,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:55:18,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:55:18,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:55:18,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:55:18,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:55:18,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:55:18,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:55:18,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:55:18,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:55:18,551 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:55:18,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:55:18,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:55:18,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:55:18,555 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_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 [2021-11-23 12:55:18,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:55:18,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:55:18,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:55:18,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:55:18,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:55:18,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2021-11-23 12:55:18,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/data/06cf2adc1/7e1c37ff25734cdd9da8a34fbc511599/FLAG593f9c0e9 [2021-11-23 12:55:19,564 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:55:19,564 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2021-11-23 12:55:19,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/data/06cf2adc1/7e1c37ff25734cdd9da8a34fbc511599/FLAG593f9c0e9 [2021-11-23 12:55:19,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/data/06cf2adc1/7e1c37ff25734cdd9da8a34fbc511599 [2021-11-23 12:55:19,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:55:19,913 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:55:19,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:55:19,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:55:19,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:55:19,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60732c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:19, skipping insertion in model container [2021-11-23 12:55:19,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:55:19" (1/1) ... [2021-11-23 12:55:19,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:55:19,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:55:20,193 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_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2021-11-23 12:55:20,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:55:20,214 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:55:20,232 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_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2021-11-23 12:55:20,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:55:20,248 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:55:20,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20 WrapperNode [2021-11-23 12:55:20,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:55:20,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:55:20,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:55:20,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:55:20,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,292 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-11-23 12:55:20,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:55:20,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:55:20,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:55:20,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:55:20,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:55:20,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:55:20,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:55:20,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:55:20,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (1/1) ... [2021-11-23 12:55:20,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:55:20,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:20,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:55:20,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:55:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:55:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:55:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-11-23 12:55:20,455 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-11-23 12:55:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-11-23 12:55:20,456 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-11-23 12:55:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:55:20,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:55:20,543 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:55:20,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:55:20,748 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:55:20,756 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:55:20,756 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 12:55:20,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:55:20 BoogieIcfgContainer [2021-11-23 12:55:20,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:55:20,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:55:20,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:55:20,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:55:20,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:55:19" (1/3) ... [2021-11-23 12:55:20,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5273410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:55:20, skipping insertion in model container [2021-11-23 12:55:20,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:55:20" (2/3) ... [2021-11-23 12:55:20,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5273410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:55:20, skipping insertion in model container [2021-11-23 12:55:20,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:55:20" (3/3) ... [2021-11-23 12:55:20,771 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2021-11-23 12:55:20,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:55:20,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:55:20,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:55:20,848 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:55:20,849 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:55:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 12:55:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:55:20,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:20,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:20,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-11-23 12:55:20,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:20,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785527199] [2021-11-23 12:55:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:20,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:21,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:21,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785527199] [2021-11-23 12:55:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785527199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:21,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:21,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:55:21,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636867081] [2021-11-23 12:55:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:21,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:55:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:55:21,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:55:21,215 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:55:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:21,354 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-23 12:55:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:55:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 12:55:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:21,367 INFO L225 Difference]: With dead ends: 39 [2021-11-23 12:55:21,368 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 12:55:21,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:55:21,377 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:21,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:55:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 12:55:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 12:55:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 12:55:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-23 12:55:21,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-11-23 12:55:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:21,435 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-23 12:55:21,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:55:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-23 12:55:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:55:21,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:21,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:21,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:55:21,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-11-23 12:55:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:21,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591961813] [2021-11-23 12:55:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:21,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:55:21,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591961813] [2021-11-23 12:55:21,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591961813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:55:21,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:55:21,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:55:21,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044898755] [2021-11-23 12:55:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:55:21,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:55:21,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:55:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:55:21,535 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:55:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:21,634 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-23 12:55:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:55:21,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 12:55:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:21,637 INFO L225 Difference]: With dead ends: 33 [2021-11-23 12:55:21,637 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 12:55:21,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:55:21,640 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:21,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:55:21,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 12:55:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-23 12:55:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 12:55:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-23 12:55:21,653 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-11-23 12:55:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:21,653 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-23 12:55:21,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:55:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-23 12:55:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 12:55:21,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:21,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:21,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:55:21,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-11-23 12:55:21,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:21,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069308873] [2021-11-23 12:55:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:21,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-23 12:55:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:21,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069308873] [2021-11-23 12:55:21,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069308873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753472590] [2021-11-23 12:55:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:21,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:21,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:21,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:55:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:55:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:22,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:22,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753472590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:22,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:22,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-11-23 12:55:22,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977425337] [2021-11-23 12:55:22,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:22,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 12:55:22,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 12:55:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:55:22,655 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 12:55:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:22,925 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-11-23 12:55:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:55:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-11-23 12:55:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:22,932 INFO L225 Difference]: With dead ends: 55 [2021-11-23 12:55:22,933 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 12:55:22,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-23 12:55:22,945 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:22,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 136 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:55:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 12:55:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-23 12:55:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 12:55:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-23 12:55:22,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-11-23 12:55:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:22,973 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-23 12:55:22,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 12:55:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-23 12:55:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:55:22,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:22,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:23,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:23,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:23,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:23,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-11-23 12:55:23,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:23,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414524890] [2021-11-23 12:55:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:23,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:23,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:23,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:23,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:23,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:23,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414524890] [2021-11-23 12:55:23,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414524890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:23,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357602404] [2021-11-23 12:55:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:23,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:23,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:23,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:23,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:55:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:23,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:55:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:55:23,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357602404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:23,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:23,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-11-23 12:55:23,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008822973] [2021-11-23 12:55:23,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:23,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 12:55:23,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 12:55:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:55:23,968 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 12:55:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:24,192 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-11-23 12:55:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:55:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-11-23 12:55:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:24,203 INFO L225 Difference]: With dead ends: 51 [2021-11-23 12:55:24,203 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 12:55:24,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:55:24,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:24,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 110 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:55:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 12:55:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-11-23 12:55:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-23 12:55:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-11-23 12:55:24,256 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-11-23 12:55:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:24,258 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-11-23 12:55:24,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 12:55:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-11-23 12:55:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 12:55:24,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:24,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:24,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:24,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:24,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:24,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-11-23 12:55:24,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:24,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638544682] [2021-11-23 12:55:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:24,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-23 12:55:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-23 12:55:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:55:24,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:24,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638544682] [2021-11-23 12:55:24,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638544682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:24,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104633850] [2021-11-23 12:55:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:24,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:24,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:24,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:24,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:55:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:55:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 12:55:24,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:25,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104633850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:25,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:25,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-11-23 12:55:25,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232110717] [2021-11-23 12:55:25,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:25,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 12:55:25,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 12:55:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-23 12:55:25,350 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 12:55:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:25,662 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-11-23 12:55:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:55:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-11-23 12:55:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:25,665 INFO L225 Difference]: With dead ends: 105 [2021-11-23 12:55:25,665 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 12:55:25,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-23 12:55:25,669 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:25,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:55:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 12:55:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-23 12:55:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-23 12:55:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-11-23 12:55:25,683 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-11-23 12:55:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:25,684 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-11-23 12:55:25,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 12:55:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-11-23 12:55:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 12:55:25,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:25,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:25,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:25,906 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-11-23 12:55:25,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:25,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971548598] [2021-11-23 12:55:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:25,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:25,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 12:55:26,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:26,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971548598] [2021-11-23 12:55:26,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971548598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017115665] [2021-11-23 12:55:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:26,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:26,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:26,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:55:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:26,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:55:26,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:55:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:55:26,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017115665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:26,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:26,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2021-11-23 12:55:26,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743516061] [2021-11-23 12:55:26,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:26,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 12:55:26,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 12:55:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-23 12:55:26,782 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 12:55:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:27,219 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-11-23 12:55:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 12:55:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2021-11-23 12:55:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:27,230 INFO L225 Difference]: With dead ends: 177 [2021-11-23 12:55:27,230 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 12:55:27,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:55:27,244 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:27,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 238 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:55:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 12:55:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-11-23 12:55:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-11-23 12:55:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-11-23 12:55:27,297 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-11-23 12:55:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:27,299 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-11-23 12:55:27,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 12:55:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-11-23 12:55:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:55:27,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:27,314 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:27,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:27,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:27,515 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:27,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:27,515 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-11-23 12:55:27,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:27,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044969822] [2021-11-23 12:55:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:27,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-23 12:55:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 12:55:27,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:27,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044969822] [2021-11-23 12:55:27,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044969822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:27,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751359923] [2021-11-23 12:55:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:27,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:27,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:27,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:27,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:55:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:55:27,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 12:55:28,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 12:55:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751359923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:28,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:28,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2021-11-23 12:55:28,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528964472] [2021-11-23 12:55:28,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:28,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 12:55:28,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:28,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 12:55:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:55:28,694 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-23 12:55:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:29,207 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2021-11-23 12:55:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 12:55:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 51 [2021-11-23 12:55:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:29,212 INFO L225 Difference]: With dead ends: 255 [2021-11-23 12:55:29,212 INFO L226 Difference]: Without dead ends: 155 [2021-11-23 12:55:29,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-11-23 12:55:29,216 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:29,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:55:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-23 12:55:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-11-23 12:55:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2021-11-23 12:55:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2021-11-23 12:55:29,246 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2021-11-23 12:55:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:29,247 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2021-11-23 12:55:29,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-23 12:55:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2021-11-23 12:55:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:55:29,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:29,251 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:29,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:29,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 12:55:29,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2021-11-23 12:55:29,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:29,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786573734] [2021-11-23 12:55:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:29,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-23 12:55:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 12:55:29,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:29,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786573734] [2021-11-23 12:55:29,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786573734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:29,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061335553] [2021-11-23 12:55:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:29,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:29,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:29,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:29,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:55:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:55:29,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 12:55:30,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 12:55:30,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061335553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:30,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:30,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2021-11-23 12:55:30,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467353445] [2021-11-23 12:55:30,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:30,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 12:55:30,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 12:55:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:55:30,674 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2021-11-23 12:55:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:31,090 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2021-11-23 12:55:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 12:55:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 79 [2021-11-23 12:55:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:31,094 INFO L225 Difference]: With dead ends: 241 [2021-11-23 12:55:31,094 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 12:55:31,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:55:31,097 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:31,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 199 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:55:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 12:55:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2021-11-23 12:55:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (52), 20 states have call predecessors, (52), 19 states have call successors, (52) [2021-11-23 12:55:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2021-11-23 12:55:31,131 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 79 [2021-11-23 12:55:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:31,132 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2021-11-23 12:55:31,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2021-11-23 12:55:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2021-11-23 12:55:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 12:55:31,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:31,138 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:31,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:31,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 12:55:31,352 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1761405513, now seen corresponding path program 1 times [2021-11-23 12:55:31,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:31,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188115129] [2021-11-23 12:55:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:31,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-23 12:55:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 92 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-23 12:55:31,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188115129] [2021-11-23 12:55:31,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188115129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:31,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636329548] [2021-11-23 12:55:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:31,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:31,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:31,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:55:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:55:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-23 12:55:32,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 59 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 12:55:33,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636329548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:33,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:33,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 13] total 29 [2021-11-23 12:55:33,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026216647] [2021-11-23 12:55:33,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:33,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 12:55:33,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 12:55:33,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:55:33,571 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand has 29 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 29 states have internal predecessors, (82), 20 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 18 states have call predecessors, (33), 20 states have call successors, (33) [2021-11-23 12:55:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:34,313 INFO L93 Difference]: Finished difference Result 235 states and 425 transitions. [2021-11-23 12:55:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 12:55:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 29 states have internal predecessors, (82), 20 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 18 states have call predecessors, (33), 20 states have call successors, (33) Word has length 133 [2021-11-23 12:55:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:34,324 INFO L225 Difference]: With dead ends: 235 [2021-11-23 12:55:34,325 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 12:55:34,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 12:55:34,331 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:34,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 395 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:55:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 12:55:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2021-11-23 12:55:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 73 states have internal predecessors, (85), 19 states have call successors, (19), 11 states have call predecessors, (19), 15 states have return successors, (53), 24 states have call predecessors, (53), 19 states have call successors, (53) [2021-11-23 12:55:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2021-11-23 12:55:34,363 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 133 [2021-11-23 12:55:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:34,364 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2021-11-23 12:55:34,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 29 states have internal predecessors, (82), 20 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 18 states have call predecessors, (33), 20 states have call successors, (33) [2021-11-23 12:55:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2021-11-23 12:55:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 12:55:34,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:34,367 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:34,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:34,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:34,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 2 times [2021-11-23 12:55:34,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:34,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621284338] [2021-11-23 12:55:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:34,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-23 12:55:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-23 12:55:34,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:34,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621284338] [2021-11-23 12:55:34,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621284338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:34,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328981197] [2021-11-23 12:55:34,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:55:34,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:34,920 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:34,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:55:35,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:55:35,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:35,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:55:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 12:55:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 12:55:35,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328981197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:35,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:35,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 19 [2021-11-23 12:55:35,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369788152] [2021-11-23 12:55:35,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:35,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 12:55:35,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 12:55:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:55:35,780 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-23 12:55:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:36,061 INFO L93 Difference]: Finished difference Result 222 states and 336 transitions. [2021-11-23 12:55:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 12:55:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) Word has length 92 [2021-11-23 12:55:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:36,068 INFO L225 Difference]: With dead ends: 222 [2021-11-23 12:55:36,068 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 12:55:36,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:55:36,070 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:36,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 190 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:55:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 12:55:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2021-11-23 12:55:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 80 states have (on average 1.1375) internal successors, (91), 78 states have internal predecessors, (91), 20 states have call successors, (20), 12 states have call predecessors, (20), 16 states have return successors, (54), 26 states have call predecessors, (54), 20 states have call successors, (54) [2021-11-23 12:55:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2021-11-23 12:55:36,099 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 92 [2021-11-23 12:55:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:36,099 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2021-11-23 12:55:36,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-23 12:55:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2021-11-23 12:55:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 12:55:36,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:36,103 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:36,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:36,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:36,324 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1154581566, now seen corresponding path program 3 times [2021-11-23 12:55:36,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:36,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706880631] [2021-11-23 12:55:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:36,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-23 12:55:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 108 proven. 97 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 12:55:36,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:36,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706880631] [2021-11-23 12:55:36,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706880631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338372975] [2021-11-23 12:55:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:55:36,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:36,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:36,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:55:36,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 12:55:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:55:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 12:55:37,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 12:55:38,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338372975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:38,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:38,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 29 [2021-11-23 12:55:38,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616415931] [2021-11-23 12:55:38,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:38,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 12:55:38,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 12:55:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-11-23 12:55:38,011 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 29 states have internal predecessors, (81), 17 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 17 states have call successors, (27) [2021-11-23 12:55:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:38,673 INFO L93 Difference]: Finished difference Result 258 states and 421 transitions. [2021-11-23 12:55:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 12:55:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 29 states have internal predecessors, (81), 17 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 17 states have call successors, (27) Word has length 119 [2021-11-23 12:55:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:38,677 INFO L225 Difference]: With dead ends: 258 [2021-11-23 12:55:38,677 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 12:55:38,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:55:38,681 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 168 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:38,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 304 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:55:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 12:55:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2021-11-23 12:55:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 86 states have internal predecessors, (104), 22 states have call successors, (22), 17 states have call predecessors, (22), 15 states have return successors, (54), 24 states have call predecessors, (54), 22 states have call successors, (54) [2021-11-23 12:55:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2021-11-23 12:55:38,696 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 119 [2021-11-23 12:55:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:38,697 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2021-11-23 12:55:38,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.892857142857143) internal successors, (81), 29 states have internal predecessors, (81), 17 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 17 states have call successors, (27) [2021-11-23 12:55:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2021-11-23 12:55:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 12:55:38,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:38,700 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:38,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:38,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:38,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 4 times [2021-11-23 12:55:38,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119294363] [2021-11-23 12:55:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:38,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-23 12:55:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-23 12:55:39,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:39,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119294363] [2021-11-23 12:55:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119294363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:39,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512957767] [2021-11-23 12:55:39,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:55:39,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:39,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:39,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:55:39,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:55:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 12:55:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-23 12:55:40,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-23 12:55:41,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512957767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:41,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:41,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2021-11-23 12:55:41,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361684600] [2021-11-23 12:55:41,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:41,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 12:55:41,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:41,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 12:55:41,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-11-23 12:55:41,768 INFO L87 Difference]: Start difference. First operand 128 states and 180 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-23 12:55:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:42,011 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2021-11-23 12:55:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 12:55:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2021-11-23 12:55:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:42,014 INFO L225 Difference]: With dead ends: 135 [2021-11-23 12:55:42,015 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 12:55:42,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 236 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-11-23 12:55:42,016 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:42,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 984 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:55:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 12:55:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-11-23 12:55:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 86 states have internal predecessors, (104), 22 states have call successors, (22), 17 states have call predecessors, (22), 15 states have return successors, (53), 24 states have call predecessors, (53), 22 states have call successors, (53) [2021-11-23 12:55:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 179 transitions. [2021-11-23 12:55:42,030 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 179 transitions. Word has length 106 [2021-11-23 12:55:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:42,031 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 179 transitions. [2021-11-23 12:55:42,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-23 12:55:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 179 transitions. [2021-11-23 12:55:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 12:55:42,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:55:42,035 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:42,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:42,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:42,248 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:55:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:55:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1967848152, now seen corresponding path program 5 times [2021-11-23 12:55:42,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:55:42,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934513502] [2021-11-23 12:55:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:55:42,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:55:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 12:55:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-23 12:55:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-23 12:55:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-23 12:55:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 12:55:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-23 12:55:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-23 12:55:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:55:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 165 proven. 92 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 12:55:42,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:55:42,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934513502] [2021-11-23 12:55:42,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934513502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:55:42,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678562391] [2021-11-23 12:55:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:55:42,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:55:42,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:55:42,692 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:55:42,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:55:42,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 12:55:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:55:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:55:42,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:55:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-23 12:55:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:55:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 152 proven. 146 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-23 12:55:44,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678562391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:55:44,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:55:44,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 30 [2021-11-23 12:55:44,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11797981] [2021-11-23 12:55:44,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:55:44,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 12:55:44,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:55:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 12:55:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-11-23 12:55:44,647 INFO L87 Difference]: Start difference. First operand 128 states and 179 transitions. Second operand has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 30 states have internal predecessors, (94), 22 states have call successors, (30), 1 states have call predecessors, (30), 10 states have return successors, (34), 16 states have call predecessors, (34), 22 states have call successors, (34) [2021-11-23 12:55:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:55:45,232 INFO L93 Difference]: Finished difference Result 235 states and 349 transitions. [2021-11-23 12:55:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:55:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 30 states have internal predecessors, (94), 22 states have call successors, (30), 1 states have call predecessors, (30), 10 states have return successors, (34), 16 states have call predecessors, (34), 22 states have call successors, (34) Word has length 147 [2021-11-23 12:55:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:55:45,238 INFO L225 Difference]: With dead ends: 235 [2021-11-23 12:55:45,238 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 12:55:45,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 12:55:45,241 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:55:45,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 402 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:55:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 12:55:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 12:55:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:55:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 12:55:45,243 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 147 [2021-11-23 12:55:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:55:45,243 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 12:55:45,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 30 states have internal predecessors, (94), 22 states have call successors, (30), 1 states have call predecessors, (30), 10 states have return successors, (34), 16 states have call predecessors, (34), 22 states have call successors, (34) [2021-11-23 12:55:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 12:55:45,244 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 12:55:45,247 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 12:55:45,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:55:45,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 12:55:45,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 12:55:46,755 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 12:55:46,756 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-23 12:55:46,756 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 12:55:46,756 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-23 12:55:46,756 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-11-23 12:55:46,756 INFO L854 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (<= 5 |ULTIMATE.start_main_~x~0#1|) [2021-11-23 12:55:46,757 INFO L858 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-11-23 12:55:46,757 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-11-23 12:55:46,757 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 5 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 5)) [2021-11-23 12:55:46,757 INFO L858 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-11-23 12:55:46,757 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2021-11-23 12:55:46,757 INFO L861 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-11-23 12:55:46,758 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2021-11-23 12:55:46,758 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-23 12:55:46,758 INFO L854 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (or (and (<= |fibo2_#t~ret6| 1) (<= 1 |fibo2_#t~ret6|)) (not (<= |fibo2_#in~n| 3))) (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse0 (<= 5 fibo2_~n)) (and .cse0 (<= |fibo2_#t~ret6| 2) (<= 2 |fibo2_#t~ret6|)) (and (<= fibo2_~n 2) .cse0 (< 1 fibo2_~n)) (and (<= 3 fibo2_~n) .cse0 (<= fibo2_~n 3))))) [2021-11-23 12:55:46,758 INFO L858 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-11-23 12:55:46,758 INFO L858 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2021-11-23 12:55:46,758 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2021-11-23 12:55:46,758 INFO L858 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2021-11-23 12:55:46,759 INFO L858 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2021-11-23 12:55:46,759 INFO L861 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-11-23 12:55:46,759 INFO L854 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (not (<= |fibo1_#in~n| 1))) [2021-11-23 12:55:46,759 INFO L858 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-11-23 12:55:46,759 INFO L854 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (<= 3 fibo1_~n)) (.cse1 (<= |fibo1_#in~n| 4)) (.cse2 (= fibo1_~n |fibo1_#in~n|))) (and (or (<= fibo1_~n 2) (and (<= 3 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 3)) (<= 6 fibo1_~n) (and .cse0 .cse1 .cse2)) (or (and .cse2 (<= 5 fibo1_~n)) (and .cse0 (<= 4 |fibo1_#in~n|) .cse1 .cse2) (and (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret4|) .cse2 (<= |fibo1_#t~ret4| 1))))) [2021-11-23 12:55:46,759 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2021-11-23 12:55:46,760 INFO L858 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-11-23 12:55:46,760 INFO L858 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2021-11-23 12:55:46,760 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2021-11-23 12:55:46,760 INFO L858 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2021-11-23 12:55:46,764 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:55:46,766 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 12:55:46,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:55:46 BoogieIcfgContainer [2021-11-23 12:55:46,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 12:55:46,788 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:55:46,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:55:46,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:55:46,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:55:20" (3/4) ... [2021-11-23 12:55:46,792 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 12:55:46,800 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2021-11-23 12:55:46,801 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2021-11-23 12:55:46,808 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-23 12:55:46,808 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 12:55:46,809 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 12:55:46,809 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 12:55:46,859 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 12:55:46,859 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:55:46,860 INFO L158 Benchmark]: Toolchain (without parser) took 26946.88ms. Allocated memory was 123.7MB in the beginning and 234.9MB in the end (delta: 111.1MB). Free memory was 94.5MB in the beginning and 133.1MB in the end (delta: -38.6MB). Peak memory consumption was 72.1MB. Max. memory is 16.1GB. [2021-11-23 12:55:46,861 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 123.7MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:55:46,861 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.00ms. Allocated memory was 123.7MB in the beginning and 161.5MB in the end (delta: 37.7MB). Free memory was 94.3MB in the beginning and 134.2MB in the end (delta: -39.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:55:46,862 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.17ms. Allocated memory is still 161.5MB. Free memory was 134.2MB in the beginning and 132.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:55:46,863 INFO L158 Benchmark]: Boogie Preprocessor took 24.68ms. Allocated memory is still 161.5MB. Free memory was 132.7MB in the beginning and 131.8MB in the end (delta: 923.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:55:46,863 INFO L158 Benchmark]: RCFGBuilder took 439.40ms. Allocated memory is still 161.5MB. Free memory was 131.8MB in the beginning and 122.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 12:55:46,864 INFO L158 Benchmark]: TraceAbstraction took 26025.23ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 122.0MB in the beginning and 135.2MB in the end (delta: -13.3MB). Peak memory consumption was 126.3MB. Max. memory is 16.1GB. [2021-11-23 12:55:46,865 INFO L158 Benchmark]: Witness Printer took 72.03ms. Allocated memory is still 234.9MB. Free memory was 135.2MB in the beginning and 133.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:55:46,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 123.7MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.00ms. Allocated memory was 123.7MB in the beginning and 161.5MB in the end (delta: 37.7MB). Free memory was 94.3MB in the beginning and 134.2MB in the end (delta: -39.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.17ms. Allocated memory is still 161.5MB. Free memory was 134.2MB in the beginning and 132.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.68ms. Allocated memory is still 161.5MB. Free memory was 132.7MB in the beginning and 131.8MB in the end (delta: 923.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 439.40ms. Allocated memory is still 161.5MB. Free memory was 131.8MB in the beginning and 122.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 26025.23ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 122.0MB in the beginning and 135.2MB in the end (delta: -13.3MB). Peak memory consumption was 126.3MB. Max. memory is 16.1GB. * Witness Printer took 72.03ms. Allocated memory is still 234.9MB. Free memory was 135.2MB in the beginning and 133.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.9s, OverallIterations: 13, TraceHistogramMax: 11, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 853 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 774 mSDsluCounter, 3517 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3148 mSDsCounter, 782 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4151 IncrementalHoareTripleChecker+Invalid, 4933 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 782 mSolverCounterUnsat, 369 mSDtfsCounter, 4151 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2177 GetRequests, 1848 SyntacticMatches, 30 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=11, InterpolantAutomatonStates: 221, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 143 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 518 PreInvPairs, 652 NumberOfFragments, 138 HoareAnnotationTreeSize, 518 FomulaSimplifications, 2942 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4414 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.1s InterpolantComputationTime, 1715 NumberOfCodeBlocks, 1643 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 2527 ConstructedInterpolants, 0 QuantifiedInterpolants, 5743 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1950 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 35 InterpolantComputations, 2 PerfectInterpolantSequences, 4703/6024 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 5 <= x RESULT: Ultimate proved your program to be correct! [2021-11-23 12:55:46,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15186a16-10a7-46a2-a2d9-c0cac9d9a41c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE