./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/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_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:20:05,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:20:05,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:20:05,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:20:05,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:20:05,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:20:05,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:20:05,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:20:05,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:20:05,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:20:05,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:20:05,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:20:05,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:20:05,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:20:05,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:20:05,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:20:05,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:20:05,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:20:05,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:20:05,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:20:05,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:20:05,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:20:05,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:20:05,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:20:05,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:20:05,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:20:05,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:20:05,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:20:05,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:20:05,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:20:05,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:20:05,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:20:05,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:20:05,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:20:05,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:20:05,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:20:05,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:20:05,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:20:05,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:20:05,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:20:05,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:20:05,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:20:05,408 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:20:05,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:20:05,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:20:05,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:20:05,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:20:05,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:20:05,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:20:05,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:20:05,413 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:20:05,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:20:05,414 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:20:05,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:20:05,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:20:05,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:20:05,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:20:05,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:20:05,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:20:05,417 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:20:05,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:20:05,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:20:05,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:20:05,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:20:05,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:20:05,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:20:05,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:20:05,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:20:05,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:20:05,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:20:05,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:20:05,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:20:05,421 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:20:05,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:20:05,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:20:05,422 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_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 [2022-11-20 11:20:05,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:20:05,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:20:05,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:20:05,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:20:05,866 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:20:05,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2022-11-20 11:20:09,601 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:20:09,827 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:20:09,828 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2022-11-20 11:20:09,837 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/data/d5ce63598/c9979e12a8f84cfd87d93847671d50e3/FLAG860746e0a [2022-11-20 11:20:09,863 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/data/d5ce63598/c9979e12a8f84cfd87d93847671d50e3 [2022-11-20 11:20:09,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:20:09,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:20:09,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:20:09,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:20:09,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:20:09,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:20:09" (1/1) ... [2022-11-20 11:20:09,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@529a352b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:09, skipping insertion in model container [2022-11-20 11:20:09,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:20:09" (1/1) ... [2022-11-20 11:20:09,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:20:09,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:20:10,126 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-11-20 11:20:10,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:20:10,142 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:20:10,159 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-11-20 11:20:10,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:20:10,175 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:20:10,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10 WrapperNode [2022-11-20 11:20:10,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:20:10,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:20:10,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:20:10,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:20:10,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,215 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-20 11:20:10,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:20:10,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:20:10,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:20:10,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:20:10,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,239 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:20:10,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:20:10,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:20:10,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:20:10,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (1/1) ... [2022-11-20 11:20:10,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:20:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:10,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:20:10,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:20:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:20:10,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:20:10,352 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-11-20 11:20:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-11-20 11:20:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-11-20 11:20:10,355 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-11-20 11:20:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:20:10,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:20:10,451 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:20:10,454 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:20:10,604 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:20:10,611 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:20:10,612 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 11:20:10,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:20:10 BoogieIcfgContainer [2022-11-20 11:20:10,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:20:10,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:20:10,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:20:10,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:20:10,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:20:09" (1/3) ... [2022-11-20 11:20:10,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3291aa96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:20:10, skipping insertion in model container [2022-11-20 11:20:10,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:20:10" (2/3) ... [2022-11-20 11:20:10,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3291aa96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:20:10, skipping insertion in model container [2022-11-20 11:20:10,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:20:10" (3/3) ... [2022-11-20 11:20:10,628 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2022-11-20 11:20:10,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:20:10,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:20:10,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:20:10,727 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@681c3b8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:20:10,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:20:10,733 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) [2022-11-20 11:20:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:20:10,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:10,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:10,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2022-11-20 11:20:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:10,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378953754] [2022-11-20 11:20:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:11,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:11,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:11,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378953754] [2022-11-20 11:20:11,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378953754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:11,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:11,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:20:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532659303] [2022-11-20 11:20:11,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:11,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:20:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:20:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:20:11,340 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) [2022-11-20 11:20:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:11,448 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-20 11:20:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:20:11,451 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 [2022-11-20 11:20:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:11,472 INFO L225 Difference]: With dead ends: 39 [2022-11-20 11:20:11,472 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 11:20:11,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:11,480 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:11,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:20:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 11:20:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 11:20:11,579 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) [2022-11-20 11:20:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-20 11:20:11,583 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-11-20 11:20:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:11,584 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-20 11:20:11,584 INFO L496 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) [2022-11-20 11:20:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-20 11:20:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:20:11,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:11,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:11,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:20:11,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2022-11-20 11:20:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:11,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041237038] [2022-11-20 11:20:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:11,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:11,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:11,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:11,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041237038] [2022-11-20 11:20:11,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041237038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:11,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:11,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:20:11,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139917614] [2022-11-20 11:20:11,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:20:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:20:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:20:11,798 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) [2022-11-20 11:20:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:11,891 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-20 11:20:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:20:11,892 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 [2022-11-20 11:20:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:11,894 INFO L225 Difference]: With dead ends: 33 [2022-11-20 11:20:11,894 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 11:20:11,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:20:11,904 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:11,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:20:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 11:20:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-20 11:20:11,919 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) [2022-11-20 11:20:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-20 11:20:11,921 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2022-11-20 11:20:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:11,924 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-20 11:20:11,924 INFO L496 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) [2022-11-20 11:20:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-20 11:20:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:20:11,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:11,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:20:11,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2022-11-20 11:20:11,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:11,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881900350] [2022-11-20 11:20:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:11,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:20:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881900350] [2022-11-20 11:20:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881900350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361156238] [2022-11-20 11:20:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:12,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:12,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:12,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:12,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:20:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:20:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:20:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:20:12,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361156238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:12,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:12,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-11-20 11:20:12,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344813546] [2022-11-20 11:20:12,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:20:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:12,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:20:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:20:12,733 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) [2022-11-20 11:20:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:12,962 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-11-20 11:20:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:20:12,964 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 [2022-11-20 11:20:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:12,965 INFO L225 Difference]: With dead ends: 55 [2022-11-20 11:20:12,965 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 11:20:12,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:20:12,971 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:12,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 107 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:20:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 11:20:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-20 11:20:12,991 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) [2022-11-20 11:20:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-20 11:20:12,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-11-20 11:20:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:12,993 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-20 11:20:12,994 INFO L496 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) [2022-11-20 11:20:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-20 11:20:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:20:13,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:13,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:13,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:20:13,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:13,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2022-11-20 11:20:13,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:13,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46230381] [2022-11-20 11:20:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:13,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:20:13,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:13,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46230381] [2022-11-20 11:20:13,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46230381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968883784] [2022-11-20 11:20:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:13,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:13,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:20:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:20:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:20:13,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:20:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968883784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:14,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-11-20 11:20:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409584275] [2022-11-20 11:20:14,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:20:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:20:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:20:14,085 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) [2022-11-20 11:20:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:14,328 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-11-20 11:20:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:20:14,329 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 [2022-11-20 11:20:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:14,338 INFO L225 Difference]: With dead ends: 51 [2022-11-20 11:20:14,338 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 11:20:14,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:20:14,343 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:14,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 83 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:20:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 11:20:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-20 11:20:14,365 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) [2022-11-20 11:20:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-11-20 11:20:14,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2022-11-20 11:20:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:14,368 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-11-20 11:20:14,368 INFO L496 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) [2022-11-20 11:20:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-11-20 11:20:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:20:14,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:14,371 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:14,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:14,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:14,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2022-11-20 11:20:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:14,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409832404] [2022-11-20 11:20:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-20 11:20:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:20:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:14,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409832404] [2022-11-20 11:20:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409832404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294613845] [2022-11-20 11:20:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:14,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:14,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:14,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:20:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:20:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:20:14,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:20:15,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294613845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:15,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:15,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2022-11-20 11:20:15,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117045074] [2022-11-20 11:20:15,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:15,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:20:15,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:20:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:20:15,456 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) [2022-11-20 11:20:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:15,898 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-11-20 11:20:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:20:15,899 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 [2022-11-20 11:20:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:15,902 INFO L225 Difference]: With dead ends: 105 [2022-11-20 11:20:15,902 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 11:20:15,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:20:15,905 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:15,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 123 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:20:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 11:20:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 11:20:15,919 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) [2022-11-20 11:20:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2022-11-20 11:20:15,921 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2022-11-20 11:20:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:15,922 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2022-11-20 11:20:15,922 INFO L496 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) [2022-11-20 11:20:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2022-11-20 11:20:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:20:15,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:15,925 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:15,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:20:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:16,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2022-11-20 11:20:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123375731] [2022-11-20 11:20:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:16,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:20:16,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123375731] [2022-11-20 11:20:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123375731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816155173] [2022-11-20 11:20:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:16,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:16,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:16,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:20:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:20:16,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:20:16,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:20:17,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816155173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:17,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:17,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2022-11-20 11:20:17,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284149194] [2022-11-20 11:20:17,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:17,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:20:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:20:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:20:17,113 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) [2022-11-20 11:20:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:17,695 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2022-11-20 11:20:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:20:17,696 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 [2022-11-20 11:20:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:17,699 INFO L225 Difference]: With dead ends: 177 [2022-11-20 11:20:17,699 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 11:20:17,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:20:17,702 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:17,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 195 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:20:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 11:20:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-11-20 11:20:17,724 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) [2022-11-20 11:20:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2022-11-20 11:20:17,728 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2022-11-20 11:20:17,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:17,728 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2022-11-20 11:20:17,728 INFO L496 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) [2022-11-20 11:20:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2022-11-20 11:20:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:20:17,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:17,733 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:17,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:17,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:17,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2022-11-20 11:20:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836381691] [2022-11-20 11:20:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 11:20:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:20:18,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836381691] [2022-11-20 11:20:18,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836381691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095415462] [2022-11-20 11:20:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:18,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:18,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:18,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:20:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:20:18,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:20:18,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:20:19,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095415462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:19,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:19,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-11-20 11:20:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887821931] [2022-11-20 11:20:19,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:19,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:20:19,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:20:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:20:19,167 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) [2022-11-20 11:20:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:19,807 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2022-11-20 11:20:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:20:19,808 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 [2022-11-20 11:20:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:19,810 INFO L225 Difference]: With dead ends: 255 [2022-11-20 11:20:19,811 INFO L226 Difference]: Without dead ends: 155 [2022-11-20 11:20:19,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:20:19,814 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:19,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 192 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:20:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-20 11:20:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-11-20 11:20:19,840 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) [2022-11-20 11:20:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2022-11-20 11:20:19,842 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2022-11-20 11:20:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:19,843 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2022-11-20 11:20:19,844 INFO L496 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) [2022-11-20 11:20:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2022-11-20 11:20:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 11:20:19,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:19,849 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:19,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:20,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:20,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2022-11-20 11:20:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:20,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496420740] [2022-11-20 11:20:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:20:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 11:20:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496420740] [2022-11-20 11:20:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496420740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:20,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895571736] [2022-11-20 11:20:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:20,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:20,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:20,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:20:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:20:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 11:20:20,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 11:20:21,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895571736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:21,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2022-11-20 11:20:21,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603925759] [2022-11-20 11:20:21,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:20:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:20:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:20:21,271 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) [2022-11-20 11:20:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:21,775 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2022-11-20 11:20:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:20:21,776 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 [2022-11-20 11:20:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:21,778 INFO L225 Difference]: With dead ends: 241 [2022-11-20 11:20:21,778 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 11:20:21,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:20:21,781 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:21,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:20:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 11:20:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-11-20 11:20:21,806 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) [2022-11-20 11:20:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2022-11-20 11:20:21,809 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 79 [2022-11-20 11:20:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:21,809 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2022-11-20 11:20:21,810 INFO L496 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) [2022-11-20 11:20:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2022-11-20 11:20:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-20 11:20:21,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:21,814 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:21,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:22,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1761405513, now seen corresponding path program 1 times [2022-11-20 11:20:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:22,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602010416] [2022-11-20 11:20:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:20:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:22,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:23,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:23,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 92 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-20 11:20:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602010416] [2022-11-20 11:20:23,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602010416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879373554] [2022-11-20 11:20:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:23,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:23,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:23,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:20:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:20:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-11-20 11:20:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 59 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-20 11:20:24,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879373554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:24,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:24,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 13] total 29 [2022-11-20 11:20:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487259825] [2022-11-20 11:20:24,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:20:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:20:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:20:24,600 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) [2022-11-20 11:20:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:25,480 INFO L93 Difference]: Finished difference Result 235 states and 425 transitions. [2022-11-20 11:20:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:20:25,481 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 [2022-11-20 11:20:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:25,484 INFO L225 Difference]: With dead ends: 235 [2022-11-20 11:20:25,484 INFO L226 Difference]: Without dead ends: 132 [2022-11-20 11:20:25,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:20:25,493 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:25,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 308 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:20:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-20 11:20:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2022-11-20 11:20:25,519 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) [2022-11-20 11:20:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2022-11-20 11:20:25,524 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 133 [2022-11-20 11:20:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:25,524 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2022-11-20 11:20:25,525 INFO L496 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) [2022-11-20 11:20:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2022-11-20 11:20:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 11:20:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:25,536 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:25,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:25,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 11:20:25,745 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 2 times [2022-11-20 11:20:25,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:25,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939642745] [2022-11-20 11:20:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:25,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:25,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:20:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 11:20:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:26,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939642745] [2022-11-20 11:20:26,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939642745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:26,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701652423] [2022-11-20 11:20:26,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:20:26,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:26,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:26,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:26,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:20:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:20:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:20:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-20 11:20:26,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-20 11:20:26,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701652423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:26,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:26,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 19 [2022-11-20 11:20:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176154006] [2022-11-20 11:20:26,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:26,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:20:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:20:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:20:26,961 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) [2022-11-20 11:20:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:27,309 INFO L93 Difference]: Finished difference Result 222 states and 336 transitions. [2022-11-20 11:20:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:20:27,310 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 [2022-11-20 11:20:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:27,312 INFO L225 Difference]: With dead ends: 222 [2022-11-20 11:20:27,312 INFO L226 Difference]: Without dead ends: 123 [2022-11-20 11:20:27,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:20:27,314 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:27,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 159 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:20:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-20 11:20:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-11-20 11:20:27,327 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) [2022-11-20 11:20:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2022-11-20 11:20:27,329 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 92 [2022-11-20 11:20:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:27,330 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2022-11-20 11:20:27,330 INFO L496 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) [2022-11-20 11:20:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2022-11-20 11:20:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 11:20:27,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:27,333 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:27,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:27,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:20:27,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1154581566, now seen corresponding path program 3 times [2022-11-20 11:20:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:27,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728296715] [2022-11-20 11:20:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:20:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 108 proven. 97 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-20 11:20:28,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728296715] [2022-11-20 11:20:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728296715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762837691] [2022-11-20 11:20:28,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:20:28,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:28,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:28,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:20:28,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:20:28,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:28,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:20:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 11:20:28,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-20 11:20:29,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762837691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:29,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:29,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 29 [2022-11-20 11:20:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546842673] [2022-11-20 11:20:29,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:20:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:20:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:20:29,337 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) [2022-11-20 11:20:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:30,222 INFO L93 Difference]: Finished difference Result 258 states and 421 transitions. [2022-11-20 11:20:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:20:30,223 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 [2022-11-20 11:20:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:30,227 INFO L225 Difference]: With dead ends: 258 [2022-11-20 11:20:30,227 INFO L226 Difference]: Without dead ends: 151 [2022-11-20 11:20:30,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 258 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:20:30,230 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 168 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:30,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 213 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:20:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-20 11:20:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2022-11-20 11:20:30,248 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) [2022-11-20 11:20:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2022-11-20 11:20:30,251 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 119 [2022-11-20 11:20:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:30,252 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2022-11-20 11:20:30,252 INFO L496 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) [2022-11-20 11:20:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2022-11-20 11:20:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 11:20:30,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:30,255 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:30,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:30,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:30,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 4 times [2022-11-20 11:20:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:30,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915960285] [2022-11-20 11:20:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:30,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:20:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-20 11:20:31,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:31,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915960285] [2022-11-20 11:20:31,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915960285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:31,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61236794] [2022-11-20 11:20:31,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:20:31,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:31,976 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:32,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:20:32,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:20:32,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 11:20:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-20 11:20:32,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-20 11:20:33,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61236794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:33,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:33,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2022-11-20 11:20:33,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72155594] [2022-11-20 11:20:33,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:33,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:20:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:20:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:20:33,908 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) [2022-11-20 11:20:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:34,280 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2022-11-20 11:20:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:20:34,281 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 [2022-11-20 11:20:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:34,283 INFO L225 Difference]: With dead ends: 135 [2022-11-20 11:20:34,283 INFO L226 Difference]: Without dead ends: 131 [2022-11-20 11:20:34,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 229 SyntacticMatches, 18 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:20:34,284 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:34,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 908 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:20:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-20 11:20:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-11-20 11:20:34,298 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) [2022-11-20 11:20:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 179 transitions. [2022-11-20 11:20:34,300 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 179 transitions. Word has length 106 [2022-11-20 11:20:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:34,300 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 179 transitions. [2022-11-20 11:20:34,301 INFO L496 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) [2022-11-20 11:20:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 179 transitions. [2022-11-20 11:20:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 11:20:34,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:34,306 INFO L195 NwaCegarLoop]: 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] [2022-11-20 11:20:34,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:34,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:34,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1967848152, now seen corresponding path program 5 times [2022-11-20 11:20:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:34,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168383752] [2022-11-20 11:20:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:34,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 11:20:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:34,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:34,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:20:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:20:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-20 11:20:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:20:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:20:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 165 proven. 92 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-20 11:20:35,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168383752] [2022-11-20 11:20:35,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168383752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135898538] [2022-11-20 11:20:35,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:20:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:35,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:35,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:20:35,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 11:20:35,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:20:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-20 11:20:35,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 152 proven. 146 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-11-20 11:20:37,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135898538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:37,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:37,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 30 [2022-11-20 11:20:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122433961] [2022-11-20 11:20:37,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:20:37,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:37,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:20:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:20:37,249 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) [2022-11-20 11:20:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:38,034 INFO L93 Difference]: Finished difference Result 235 states and 349 transitions. [2022-11-20 11:20:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:20:38,035 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 [2022-11-20 11:20:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:38,036 INFO L225 Difference]: With dead ends: 235 [2022-11-20 11:20:38,036 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 11:20:38,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 314 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:20:38,043 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:38,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 306 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:20:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 11:20:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 11:20:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 11:20:38,045 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 147 [2022-11-20 11:20:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:38,046 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 11:20:38,046 INFO L496 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) [2022-11-20 11:20:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 11:20:38,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 11:20:38,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 11:20:38,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:38,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:38,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 11:20:39,524 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-20 11:20:39,524 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-20 11:20:39,524 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-20 11:20:39,525 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-20 11:20:39,525 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2022-11-20 11:20:39,525 INFO L895 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (<= 5 |ULTIMATE.start_main_~x~0#1|) [2022-11-20 11:20:39,526 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2022-11-20 11:20:39,526 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2022-11-20 11:20:39,526 INFO L895 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)) [2022-11-20 11:20:39,526 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2022-11-20 11:20:39,527 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2022-11-20 11:20:39,527 INFO L902 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2022-11-20 11:20:39,527 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2022-11-20 11:20:39,527 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-20 11:20:39,528 INFO L895 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))))) [2022-11-20 11:20:39,528 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-11-20 11:20:39,528 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-11-20 11:20:39,528 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-11-20 11:20:39,529 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-11-20 11:20:39,529 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-11-20 11:20:39,529 INFO L902 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2022-11-20 11:20:39,529 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (not (<= |fibo1_#in~n| 1))) [2022-11-20 11:20:39,529 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-11-20 11:20:39,530 INFO L895 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))))) [2022-11-20 11:20:39,530 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-11-20 11:20:39,530 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-11-20 11:20:39,530 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-11-20 11:20:39,530 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-11-20 11:20:39,531 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-11-20 11:20:39,535 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:39,537 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 11:20:39,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:20:39 BoogieIcfgContainer [2022-11-20 11:20:39,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 11:20:39,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 11:20:39,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 11:20:39,554 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 11:20:39,554 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:20:10" (3/4) ... [2022-11-20 11:20:39,558 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 11:20:39,566 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-11-20 11:20:39,566 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-11-20 11:20:39,570 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-20 11:20:39,570 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-20 11:20:39,570 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-20 11:20:39,571 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 11:20:39,609 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 11:20:39,609 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 11:20:39,611 INFO L158 Benchmark]: Toolchain (without parser) took 29741.19ms. Allocated memory was 174.1MB in the beginning and 257.9MB in the end (delta: 83.9MB). Free memory was 128.5MB in the beginning and 81.2MB in the end (delta: 47.3MB). Peak memory consumption was 133.2MB. Max. memory is 16.1GB. [2022-11-20 11:20:39,611 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory was 65.5MB in the beginning and 65.4MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:20:39,612 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.49ms. Allocated memory is still 174.1MB. Free memory was 128.5MB in the beginning and 118.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:20:39,613 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.05ms. Allocated memory is still 174.1MB. Free memory was 118.5MB in the beginning and 116.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 11:20:39,613 INFO L158 Benchmark]: Boogie Preprocessor took 25.48ms. Allocated memory is still 174.1MB. Free memory was 116.9MB in the beginning and 115.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:20:39,615 INFO L158 Benchmark]: RCFGBuilder took 372.31ms. Allocated memory is still 174.1MB. Free memory was 115.9MB in the beginning and 105.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:20:39,615 INFO L158 Benchmark]: TraceAbstraction took 28934.08ms. Allocated memory was 174.1MB in the beginning and 257.9MB in the end (delta: 83.9MB). Free memory was 105.4MB in the beginning and 83.3MB in the end (delta: 22.1MB). Peak memory consumption was 108.0MB. Max. memory is 16.1GB. [2022-11-20 11:20:39,615 INFO L158 Benchmark]: Witness Printer took 56.96ms. Allocated memory is still 257.9MB. Free memory was 83.3MB in the beginning and 81.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 11:20:39,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory was 65.5MB in the beginning and 65.4MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.49ms. Allocated memory is still 174.1MB. Free memory was 128.5MB in the beginning and 118.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.05ms. Allocated memory is still 174.1MB. Free memory was 118.5MB in the beginning and 116.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.48ms. Allocated memory is still 174.1MB. Free memory was 116.9MB in the beginning and 115.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 372.31ms. Allocated memory is still 174.1MB. Free memory was 115.9MB in the beginning and 105.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 28934.08ms. Allocated memory was 174.1MB in the beginning and 257.9MB in the end (delta: 83.9MB). Free memory was 105.4MB in the beginning and 83.3MB in the end (delta: 22.1MB). Peak memory consumption was 108.0MB. Max. memory is 16.1GB. * Witness Printer took 56.96ms. Allocated memory is still 257.9MB. Free memory was 83.3MB in the beginning and 81.2MB 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: 28.8s, OverallIterations: 13, TraceHistogramMax: 11, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 856 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 776 mSDsluCounter, 2902 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2533 mSDsCounter, 781 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4775 IncrementalHoareTripleChecker+Invalid, 5556 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 781 mSolverCounterUnsat, 369 mSDtfsCounter, 4775 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2177 GetRequests, 1818 SyntacticMatches, 60 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 4.9s 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, 3220 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4419 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 1715 NumberOfCodeBlocks, 1643 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 2527 ConstructedInterpolants, 0 QuantifiedInterpolants, 5782 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! [2022-11-20 11:20:39,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6601a372-a78e-43e1-a94c-4c8421b76e15/bin/uautomizer-ug76WZFUDN/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