./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:28:23,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:28:23,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:28:23,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:28:23,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:28:23,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:28:23,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:28:23,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:28:23,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:28:23,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:28:23,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:28:23,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:28:23,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:28:23,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:28:23,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:28:23,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:28:23,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:28:23,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:28:23,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:28:23,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:28:23,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:28:23,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:28:23,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:28:23,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:28:23,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:28:23,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:28:23,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:28:23,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:28:23,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:28:23,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:28:23,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:28:23,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:28:23,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:28:23,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:28:23,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:28:23,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:28:23,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:28:23,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:28:23,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:28:23,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:28:23,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:28:23,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:28:23,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:28:23,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:28:23,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:28:23,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:28:23,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:28:23,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:28:23,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:28:23,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:28:23,424 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:28:23,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:28:23,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:28:23,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:28:23,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:28:23,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:28:23,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:28:23,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:28:23,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:28:23,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:28:23,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:28:23,427 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:28:23,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:28:23,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:28:23,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:28:23,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:28:23,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:28:23,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:28:23,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:28:23,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:28:23,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:28:23,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:28:23,430 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:28:23,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:28:23,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:28:23,431 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_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 [2022-11-21 16:28:23,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:28:23,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:28:23,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:28:23,741 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:28:23,741 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:28:23,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2022-11-21 16:28:26,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:28:27,011 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:28:27,012 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2022-11-21 16:28:27,018 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/data/8431ee617/8847808973d04e38b53c7c59b3658b35/FLAG0bf6588e6 [2022-11-21 16:28:27,033 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/data/8431ee617/8847808973d04e38b53c7c59b3658b35 [2022-11-21 16:28:27,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:28:27,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:28:27,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:28:27,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:28:27,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:28:27,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267ac256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27, skipping insertion in model container [2022-11-21 16:28:27,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:28:27,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:28:27,212 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_b6f7af59-61cc-4012-a9bd-240770c8ba8f/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2022-11-21 16:28:27,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:28:27,226 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:28:27,237 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_b6f7af59-61cc-4012-a9bd-240770c8ba8f/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2022-11-21 16:28:27,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:28:27,251 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:28:27,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27 WrapperNode [2022-11-21 16:28:27,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:28:27,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:28:27,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:28:27,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:28:27,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,283 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-11-21 16:28:27,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:28:27,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:28:27,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:28:27,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:28:27,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:28:27,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:28:27,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:28:27,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:28:27,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (1/1) ... [2022-11-21 16:28:27,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:28:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:27,337 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:28:27,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:28:27,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:28:27,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:28:27,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:28:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-11-21 16:28:27,387 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-11-21 16:28:27,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:28:27,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:28:27,457 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:28:27,557 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:28:27,563 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:28:27,564 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 16:28:27,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:28:27 BoogieIcfgContainer [2022-11-21 16:28:27,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:28:27,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:28:27,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:28:27,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:28:27,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:28:27" (1/3) ... [2022-11-21 16:28:27,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb4be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:28:27, skipping insertion in model container [2022-11-21 16:28:27,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:28:27" (2/3) ... [2022-11-21 16:28:27,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb4be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:28:27, skipping insertion in model container [2022-11-21 16:28:27,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:28:27" (3/3) ... [2022-11-21 16:28:27,576 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2022-11-21 16:28:27,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:28:27,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:28:27,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:28:27,653 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;@2d2f49e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:28:27,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:28:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:28:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:28:27,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:27,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:27,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-11-21 16:28:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340578339] [2022-11-21 16:28:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:28:27,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340578339] [2022-11-21 16:28:27,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340578339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:28:27,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:28:27,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:28:27,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916532940] [2022-11-21 16:28:27,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:28:27,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:28:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:28:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:28:28,027 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-11-21 16:28:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:28,156 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-21 16:28:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:28:28,163 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 [2022-11-21 16:28:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:28,173 INFO L225 Difference]: With dead ends: 25 [2022-11-21 16:28:28,173 INFO L226 Difference]: Without dead ends: 15 [2022-11-21 16:28:28,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:28:28,184 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:28,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-21 16:28:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-21 16:28:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 16:28:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-21 16:28:28,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-11-21 16:28:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:28,235 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-21 16:28:28,236 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) [2022-11-21 16:28:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-21 16:28:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:28:28,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:28,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:28,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:28:28,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:28,246 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-11-21 16:28:28,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:28,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292015361] [2022-11-21 16:28:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:28,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:28,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:28,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:28:28,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292015361] [2022-11-21 16:28:28,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292015361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139245053] [2022-11-21 16:28:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:28,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:28,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:28:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:28:28,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:28:28,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:28:29,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139245053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:29,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:29,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-11-21 16:28:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762673138] [2022-11-21 16:28:29,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:28:29,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:28:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:28:29,207 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 16:28:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:29,295 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-21 16:28:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:28:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-11-21 16:28:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:29,298 INFO L225 Difference]: With dead ends: 22 [2022-11-21 16:28:29,299 INFO L226 Difference]: Without dead ends: 18 [2022-11-21 16:28:29,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:29,307 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:29,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-21 16:28:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-21 16:28:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-21 16:28:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-21 16:28:29,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-11-21 16:28:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:29,322 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-21 16:28:29,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 16:28:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-21 16:28:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:28:29,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:29,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:29,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:29,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:29,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-11-21 16:28:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:29,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193698934] [2022-11-21 16:28:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:29,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:29,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:28:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:29,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193698934] [2022-11-21 16:28:29,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193698934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576582500] [2022-11-21 16:28:29,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:28:29,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:29,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:29,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:29,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:28:29,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:28:29,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:28:29,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:28:29,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:28:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576582500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:30,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-11-21 16:28:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610009238] [2022-11-21 16:28:30,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:30,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:28:30,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:28:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:28:30,362 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:28:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:30,440 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-21 16:28:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:28:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-11-21 16:28:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:30,442 INFO L225 Difference]: With dead ends: 25 [2022-11-21 16:28:30,442 INFO L226 Difference]: Without dead ends: 21 [2022-11-21 16:28:30,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:28:30,458 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:30,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-21 16:28:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-21 16:28:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 16:28:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-21 16:28:30,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-11-21 16:28:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:30,465 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-21 16:28:30,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:28:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-21 16:28:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:28:30,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:30,466 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:30,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:30,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 16:28:30,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-11-21 16:28:30,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:30,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654614363] [2022-11-21 16:28:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:30,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:30,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:30,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654614363] [2022-11-21 16:28:30,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654614363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:30,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723306899] [2022-11-21 16:28:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:28:30,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:30,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:30,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:28:31,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:28:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:28:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:31,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:28:31,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723306899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:31,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:31,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2022-11-21 16:28:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815380973] [2022-11-21 16:28:31,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:31,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:28:31,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:28:31,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:28:31,681 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-21 16:28:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:31,772 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-21 16:28:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:28:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-11-21 16:28:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:31,773 INFO L225 Difference]: With dead ends: 28 [2022-11-21 16:28:31,773 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 16:28:31,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:28:31,774 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:31,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 16:28:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-21 16:28:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-21 16:28:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-21 16:28:31,780 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-11-21 16:28:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:31,780 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-21 16:28:31,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-21 16:28:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-21 16:28:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 16:28:31,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:31,781 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:31,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:31,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:31,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-11-21 16:28:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:31,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117328711] [2022-11-21 16:28:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:31,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:32,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:32,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:32,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 16:28:32,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117328711] [2022-11-21 16:28:32,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117328711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:32,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134179336] [2022-11-21 16:28:32,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:28:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:32,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:32,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:32,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:28:32,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:28:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:28:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 16:28:32,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:28:33,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134179336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:33,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:33,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2022-11-21 16:28:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502978322] [2022-11-21 16:28:33,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:28:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:28:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:28:33,297 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-21 16:28:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:33,409 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-21 16:28:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:28:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-11-21 16:28:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:33,411 INFO L225 Difference]: With dead ends: 31 [2022-11-21 16:28:33,411 INFO L226 Difference]: Without dead ends: 27 [2022-11-21 16:28:33,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:28:33,414 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:33,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 47 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:28:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-21 16:28:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-21 16:28:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 16:28:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-21 16:28:33,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-11-21 16:28:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:33,432 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-21 16:28:33,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-21 16:28:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-21 16:28:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:28:33,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:33,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:33,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:33,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:33,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-11-21 16:28:33,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:33,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201551411] [2022-11-21 16:28:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:33,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-21 16:28:33,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201551411] [2022-11-21 16:28:33,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201551411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:33,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968861618] [2022-11-21 16:28:33,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:28:33,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:33,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:34,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:28:34,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 16:28:34,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:28:34,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-21 16:28:34,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:28:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968861618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:35,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:35,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2022-11-21 16:28:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183841964] [2022-11-21 16:28:35,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:35,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:28:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:35,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:28:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:28:35,410 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-21 16:28:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:35,531 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-11-21 16:28:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:28:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-11-21 16:28:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:35,536 INFO L225 Difference]: With dead ends: 34 [2022-11-21 16:28:35,537 INFO L226 Difference]: Without dead ends: 30 [2022-11-21 16:28:35,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:28:35,538 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:35,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 57 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-21 16:28:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-21 16:28:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-21 16:28:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-21 16:28:35,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-11-21 16:28:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:35,544 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-21 16:28:35,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-21 16:28:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-21 16:28:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:28:35,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:35,546 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:35,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:35,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:28:35,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-11-21 16:28:35,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:35,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597089617] [2022-11-21 16:28:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:35,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-21 16:28:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:36,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597089617] [2022-11-21 16:28:36,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597089617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:36,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876350519] [2022-11-21 16:28:36,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:28:36,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:36,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:36,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:36,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:28:36,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 16:28:36,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:28:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-21 16:28:36,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 16:28:38,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876350519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:38,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:38,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2022-11-21 16:28:38,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8166563] [2022-11-21 16:28:38,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:38,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:28:38,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:28:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:28:38,313 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-21 16:28:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:38,458 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-11-21 16:28:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:28:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-11-21 16:28:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:38,462 INFO L225 Difference]: With dead ends: 37 [2022-11-21 16:28:38,462 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 16:28:38,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:28:38,464 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:38,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 67 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 16:28:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-21 16:28:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-21 16:28:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-21 16:28:38,478 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-11-21 16:28:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:38,480 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-21 16:28:38,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-21 16:28:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-21 16:28:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:28:38,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:38,485 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:38,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:38,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:38,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-11-21 16:28:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:38,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027429583] [2022-11-21 16:28:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:38,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:38,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:39,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:39,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-21 16:28:39,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:39,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027429583] [2022-11-21 16:28:39,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027429583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:39,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441329338] [2022-11-21 16:28:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:28:39,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:39,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:39,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:39,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:28:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:28:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-21 16:28:39,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:28:41,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441329338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:41,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:41,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2022-11-21 16:28:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954960960] [2022-11-21 16:28:41,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:41,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:28:41,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:41,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:28:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:28:41,738 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-21 16:28:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:41,905 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-21 16:28:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:28:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-11-21 16:28:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:41,909 INFO L225 Difference]: With dead ends: 40 [2022-11-21 16:28:41,909 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 16:28:41,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:28:41,912 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:41,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 61 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 16:28:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-21 16:28:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-21 16:28:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-21 16:28:41,922 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-11-21 16:28:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:41,923 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-21 16:28:41,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-21 16:28:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-21 16:28:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:28:41,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:41,927 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:41,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:42,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:42,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-11-21 16:28:42,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:42,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790621088] [2022-11-21 16:28:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 16:28:42,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:42,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790621088] [2022-11-21 16:28:42,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790621088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:42,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875088794] [2022-11-21 16:28:42,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:28:42,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:42,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:42,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:42,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:28:42,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:28:42,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:42,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:28:42,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 16:28:43,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-21 16:28:46,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875088794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:46,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:46,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2022-11-21 16:28:46,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853977644] [2022-11-21 16:28:46,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:46,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:28:46,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:28:46,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:28:46,193 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-11-21 16:28:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:46,349 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-11-21 16:28:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 16:28:46,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-11-21 16:28:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:46,354 INFO L225 Difference]: With dead ends: 43 [2022-11-21 16:28:46,355 INFO L226 Difference]: Without dead ends: 39 [2022-11-21 16:28:46,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 16:28:46,358 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:46,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 79 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-21 16:28:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-21 16:28:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-21 16:28:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-21 16:28:46,374 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-11-21 16:28:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:46,374 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-21 16:28:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-11-21 16:28:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-21 16:28:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 16:28:46,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:46,377 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:46,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:46,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:46,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-11-21 16:28:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:46,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402537677] [2022-11-21 16:28:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:46,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:46,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-21 16:28:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402537677] [2022-11-21 16:28:47,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402537677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535799433] [2022-11-21 16:28:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:28:47,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:47,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:47,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:28:47,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-21 16:28:47,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:47,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 16:28:47,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-21 16:28:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:28:51,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535799433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:51,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:51,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2022-11-21 16:28:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757692547] [2022-11-21 16:28:51,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:51,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:28:51,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:28:51,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:28:51,815 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-11-21 16:28:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:52,035 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-21 16:28:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:28:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2022-11-21 16:28:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:52,037 INFO L225 Difference]: With dead ends: 46 [2022-11-21 16:28:52,037 INFO L226 Difference]: Without dead ends: 42 [2022-11-21 16:28:52,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:28:52,038 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:52,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 89 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-21 16:28:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-21 16:28:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-21 16:28:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-21 16:28:52,044 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-11-21 16:28:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:52,045 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-21 16:28:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-11-21 16:28:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-21 16:28:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-21 16:28:52,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:52,046 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:52,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:52,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:52,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-11-21 16:28:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:52,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611441901] [2022-11-21 16:28:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:52,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:53,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-21 16:28:53,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:53,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611441901] [2022-11-21 16:28:53,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611441901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435936296] [2022-11-21 16:28:53,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:28:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:53,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:53,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:28:53,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:28:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:28:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 16:28:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:28:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-21 16:28:53,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:28:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-21 16:28:58,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435936296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:28:58,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:28:58,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2022-11-21 16:28:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106667612] [2022-11-21 16:28:58,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:28:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:28:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:28:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:28:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:28:58,548 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-11-21 16:28:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:28:58,734 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-21 16:28:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:28:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2022-11-21 16:28:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:28:58,735 INFO L225 Difference]: With dead ends: 49 [2022-11-21 16:28:58,736 INFO L226 Difference]: Without dead ends: 45 [2022-11-21 16:28:58,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 16:28:58,737 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:28:58,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 91 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:28:58,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-21 16:28:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-21 16:28:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-21 16:28:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-21 16:28:58,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-11-21 16:28:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:28:58,742 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-21 16:28:58,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-11-21 16:28:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-21 16:28:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-21 16:28:58,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:28:58,744 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:28:58,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:28:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:28:58,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:28:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:28:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-11-21 16:28:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:28:58,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628260555] [2022-11-21 16:28:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:28:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:28:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:28:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:28:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-11-21 16:28:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:28:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628260555] [2022-11-21 16:28:59,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628260555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:28:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613782244] [2022-11-21 16:28:59,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:28:59,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:28:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:28:59,933 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:28:59,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:29:00,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-21 16:29:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:29:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-11-21 16:29:00,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 16:29:06,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613782244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:06,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:06,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2022-11-21 16:29:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120172374] [2022-11-21 16:29:06,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:06,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:29:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:29:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:29:06,820 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-21 16:29:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:07,016 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-21 16:29:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:29:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2022-11-21 16:29:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:07,018 INFO L225 Difference]: With dead ends: 52 [2022-11-21 16:29:07,018 INFO L226 Difference]: Without dead ends: 48 [2022-11-21 16:29:07,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 16:29:07,019 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:07,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 89 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:29:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-21 16:29:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-21 16:29:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-21 16:29:07,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-21 16:29:07,025 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2022-11-21 16:29:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:07,025 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-21 16:29:07,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-21 16:29:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-21 16:29:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-21 16:29:07,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:07,026 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:07,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:07,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 16:29:07,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2022-11-21 16:29:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:07,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48714941] [2022-11-21 16:29:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:07,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:07,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:07,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:07,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:07,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-21 16:29:08,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48714941] [2022-11-21 16:29:08,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48714941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019143214] [2022-11-21 16:29:08,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:29:08,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:08,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:08,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:08,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:29:08,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-21 16:29:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:29:08,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-21 16:29:08,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-21 16:29:16,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019143214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:16,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:16,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2022-11-21 16:29:16,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395094546] [2022-11-21 16:29:16,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:16,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 16:29:16,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 16:29:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:29:16,979 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-11-21 16:29:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:17,215 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-21 16:29:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:29:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2022-11-21 16:29:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:17,218 INFO L225 Difference]: With dead ends: 55 [2022-11-21 16:29:17,218 INFO L226 Difference]: Without dead ends: 51 [2022-11-21 16:29:17,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:29:17,219 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:17,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 91 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:29:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-21 16:29:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-21 16:29:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-21 16:29:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-21 16:29:17,225 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2022-11-21 16:29:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:17,225 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-21 16:29:17,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-11-21 16:29:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-21 16:29:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-21 16:29:17,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:17,227 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:17,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:17,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:17,439 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2022-11-21 16:29:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133993259] [2022-11-21 16:29:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:17,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:17,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-11-21 16:29:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133993259] [2022-11-21 16:29:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133993259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830466385] [2022-11-21 16:29:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:29:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:18,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:18,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:29:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:29:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-11-21 16:29:19,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-21 16:29:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830466385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:29,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:29,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2022-11-21 16:29:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975675861] [2022-11-21 16:29:29,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:29,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:29:29,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:29:29,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:29:29,290 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-11-21 16:29:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:29,579 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-11-21 16:29:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:29:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2022-11-21 16:29:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:29,580 INFO L225 Difference]: With dead ends: 58 [2022-11-21 16:29:29,580 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 16:29:29,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 173 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:29:29,582 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 384 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:29,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:29:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 16:29:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-21 16:29:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 16:29:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-11-21 16:29:29,592 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2022-11-21 16:29:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:29,594 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-11-21 16:29:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-11-21 16:29:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-11-21 16:29:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-21 16:29:29,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:29,596 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:29,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:29,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:29,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2022-11-21 16:29:29,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:29,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184541740] [2022-11-21 16:29:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:29,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:29,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:30,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:31,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:31,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:31,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-21 16:29:31,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184541740] [2022-11-21 16:29:31,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184541740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126535419] [2022-11-21 16:29:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:29:31,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:31,222 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:31,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:29:31,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:29:31,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:31,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-21 16:29:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-21 16:29:32,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:29:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-21 16:29:44,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126535419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:29:44,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:29:44,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 35 [2022-11-21 16:29:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061125591] [2022-11-21 16:29:44,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:29:44,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:29:44,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:44,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:29:44,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 16:29:44,230 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2022-11-21 16:29:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:44,476 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-11-21 16:29:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:29:44,476 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) Word has length 94 [2022-11-21 16:29:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:44,477 INFO L225 Difference]: With dead ends: 61 [2022-11-21 16:29:44,478 INFO L226 Difference]: Without dead ends: 57 [2022-11-21 16:29:44,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 185 SyntacticMatches, 16 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=833, Invalid=1617, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:29:44,483 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 195 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:44,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 111 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:29:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-21 16:29:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-21 16:29:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-21 16:29:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-21 16:29:44,489 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2022-11-21 16:29:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:44,489 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-21 16:29:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2022-11-21 16:29:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-21 16:29:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-21 16:29:44,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:29:44,491 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:29:44,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:44,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:29:44,695 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:29:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:29:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2022-11-21 16:29:44,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:29:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782023168] [2022-11-21 16:29:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:29:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:29:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:45,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:46,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:46,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:46,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:48,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:48,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:48,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:29:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:29:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-11-21 16:29:49,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:29:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782023168] [2022-11-21 16:29:49,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782023168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:29:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243667804] [2022-11-21 16:29:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:29:49,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:29:49,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:29:49,740 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:29:49,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:29:50,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-21 16:29:50,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:29:50,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 197 conjunts are in the unsatisfiable core [2022-11-21 16:29:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:29:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-11-21 16:29:51,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:29:51,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243667804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:29:51,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:29:51,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [38] total 43 [2022-11-21 16:29:51,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480851159] [2022-11-21 16:29:51,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:29:51,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:29:51,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:29:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:29:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1510, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 16:29:51,111 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:29:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:29:51,205 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-11-21 16:29:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:29:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-11-21 16:29:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:29:51,206 INFO L225 Difference]: With dead ends: 57 [2022-11-21 16:29:51,206 INFO L226 Difference]: Without dead ends: 0 [2022-11-21 16:29:51,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2022-11-21 16:29:51,207 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:29:51,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:29:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-21 16:29:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-21 16:29:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:29:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-21 16:29:51,209 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2022-11-21 16:29:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:29:51,209 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-21 16:29:51,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:29:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-21 16:29:51,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-21 16:29:51,211 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 16:29:51,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:29:51,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:29:51,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-21 16:29:51,433 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-21 16:29:51,433 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-21 16:29:51,433 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-21 16:29:51,434 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-21 16:29:51,434 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2022-11-21 16:29:51,434 INFO L899 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2022-11-21 16:29:51,434 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2022-11-21 16:29:51,434 INFO L895 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |ULTIMATE.start_main_~a~0#1| 15) [2022-11-21 16:29:51,435 INFO L899 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2022-11-21 16:29:51,435 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2022-11-21 16:29:51,435 INFO L899 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2022-11-21 16:29:51,435 INFO L895 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2022-11-21 16:29:51,435 INFO L899 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2022-11-21 16:29:51,436 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2022-11-21 16:29:51,436 INFO L899 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2022-11-21 16:29:51,436 INFO L902 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2022-11-21 16:29:51,439 INFO L444 BasicCegarLoop]: Path program histogram: [15, 1] [2022-11-21 16:29:51,442 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 16:29:51,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 04:29:51 BoogieIcfgContainer [2022-11-21 16:29:51,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 16:29:51,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 16:29:51,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 16:29:51,446 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 16:29:51,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:28:27" (3/4) ... [2022-11-21 16:29:51,449 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-21 16:29:51,456 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2022-11-21 16:29:51,460 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-21 16:29:51,460 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-21 16:29:51,460 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-21 16:29:51,460 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-21 16:29:51,487 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 16:29:51,488 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 16:29:51,489 INFO L158 Benchmark]: Toolchain (without parser) took 84451.57ms. Allocated memory was 144.7MB in the beginning and 696.3MB in the end (delta: 551.6MB). Free memory was 113.9MB in the beginning and 307.0MB in the end (delta: -193.1MB). Peak memory consumption was 360.2MB. Max. memory is 16.1GB. [2022-11-21 16:29:51,489 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 144.7MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:29:51,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.01ms. Allocated memory is still 144.7MB. Free memory was 113.6MB in the beginning and 103.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 16:29:51,490 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.74ms. Allocated memory is still 144.7MB. Free memory was 103.9MB in the beginning and 102.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:29:51,490 INFO L158 Benchmark]: Boogie Preprocessor took 15.66ms. Allocated memory is still 144.7MB. Free memory was 102.5MB in the beginning and 101.5MB in the end (delta: 979.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:29:51,490 INFO L158 Benchmark]: RCFGBuilder took 265.90ms. Allocated memory is still 144.7MB. Free memory was 101.5MB in the beginning and 92.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 16:29:51,491 INFO L158 Benchmark]: TraceAbstraction took 83876.37ms. Allocated memory was 144.7MB in the beginning and 696.3MB in the end (delta: 551.6MB). Free memory was 91.3MB in the beginning and 309.1MB in the end (delta: -217.8MB). Peak memory consumption was 335.0MB. Max. memory is 16.1GB. [2022-11-21 16:29:51,491 INFO L158 Benchmark]: Witness Printer took 42.07ms. Allocated memory is still 696.3MB. Free memory was 309.1MB in the beginning and 307.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:29:51,501 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 144.7MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.01ms. Allocated memory is still 144.7MB. Free memory was 113.6MB in the beginning and 103.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.74ms. Allocated memory is still 144.7MB. Free memory was 103.9MB in the beginning and 102.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.66ms. Allocated memory is still 144.7MB. Free memory was 102.5MB in the beginning and 101.5MB in the end (delta: 979.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 265.90ms. Allocated memory is still 144.7MB. Free memory was 101.5MB in the beginning and 92.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 83876.37ms. Allocated memory was 144.7MB in the beginning and 696.3MB in the end (delta: 551.6MB). Free memory was 91.3MB in the beginning and 309.1MB in the end (delta: -217.8MB). Peak memory consumption was 335.0MB. Max. memory is 16.1GB. * Witness Printer took 42.07ms. Allocated memory is still 696.3MB. Free memory was 309.1MB in the beginning and 307.0MB 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: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 83.8s, OverallIterations: 16, TraceHistogramMax: 16, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1766 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1614 mSDsluCounter, 1036 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 893 mSDsCounter, 679 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 979 IncrementalHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 679 mSolverCounterUnsat, 143 mSDtfsCounter, 979 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2207 GetRequests, 1628 SyntacticMatches, 120 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, InterpolantAutomatonStates: 188, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 72.7s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 2475 ConstructedInterpolants, 0 QuantifiedInterpolants, 7955 SizeOfPredicates, 151 NumberOfNonLiveVariables, 2925 ConjunctsInSsa, 463 ConjunctsInUnsatCore, 45 InterpolantComputations, 2 PerfectInterpolantSequences, 5060/10830 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 RESULT: Ultimate proved your program to be correct! [2022-11-21 16:29:51,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f7af59-61cc-4012-a9bd-240770c8ba8f/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE