./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8 --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- 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-2329fc7 [2022-12-13 10:56:26,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:56:26,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:56:26,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:56:26,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:56:26,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:56:26,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:56:26,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:56:26,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:56:26,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:56:26,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:56:26,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:56:26,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:56:26,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:56:26,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:56:26,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:56:26,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:56:26,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:56:26,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:56:26,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:56:26,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:56:26,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:56:26,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:56:26,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:56:26,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:56:26,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:56:26,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:56:26,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:56:26,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:56:26,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:56:26,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:56:26,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:56:26,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:56:26,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:56:26,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:56:26,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:56:26,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:56:26,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:56:26,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:56:26,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:56:26,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:56:26,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 10:56:26,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:56:26,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:56:26,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:56:26,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:56:26,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:56:26,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:56:26,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:56:26,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:56:26,360 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:56:26,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:56:26,360 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 10:56:26,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:56:26,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 10:56:26,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:56:26,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 10:56:26,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:56:26,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 10:56:26,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 10:56:26,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 10:56:26,362 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:56:26,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 10:56:26,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:56:26,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:56:26,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:56:26,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:56:26,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:56:26,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:56:26,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 10:56:26,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 10:56:26,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 10:56:26,364 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:56:26,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 10:56:26,364 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:56:26,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:56:26,364 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:56:26,364 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-12-13 10:56:26,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:56:26,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:56:26,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:56:26,566 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:56:26,567 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:56:26,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-12-13 10:56:29,116 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:56:29,284 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:56:29,284 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-12-13 10:56:29,288 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/data/edf7a30e6/753310e6197d4e8f835b6a62b7dd138c/FLAG62be1548e [2022-12-13 10:56:29,298 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/data/edf7a30e6/753310e6197d4e8f835b6a62b7dd138c [2022-12-13 10:56:29,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:56:29,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:56:29,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:56:29,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:56:29,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:56:29,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a582e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29, skipping insertion in model container [2022-12-13 10:56:29,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:56:29,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:56:29,449 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_7d76819f-8f1e-4601-8ec5-85fd01793ef4/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-12-13 10:56:29,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:56:29,474 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 10:56:29,485 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_7d76819f-8f1e-4601-8ec5-85fd01793ef4/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-12-13 10:56:29,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:56:29,507 INFO L208 MainTranslator]: Completed translation [2022-12-13 10:56:29,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29 WrapperNode [2022-12-13 10:56:29,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:56:29,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 10:56:29,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 10:56:29,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 10:56:29,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,542 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-12-13 10:56:29,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 10:56:29,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 10:56:29,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 10:56:29,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 10:56:29,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,564 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 10:56:29,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 10:56:29,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 10:56:29,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 10:56:29,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (1/1) ... [2022-12-13 10:56:29,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:56:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:29,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 10:56:29,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 10:56:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 10:56:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 10:56:29,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 10:56:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 10:56:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 10:56:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 10:56:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 10:56:29,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 10:56:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 10:56:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 10:56:29,684 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 10:56:29,686 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 10:56:29,796 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 10:56:29,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 10:56:29,801 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 10:56:29,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:56:29 BoogieIcfgContainer [2022-12-13 10:56:29,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 10:56:29,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 10:56:29,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 10:56:29,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 10:56:29,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:56:29" (1/3) ... [2022-12-13 10:56:29,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292406d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:56:29, skipping insertion in model container [2022-12-13 10:56:29,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:56:29" (2/3) ... [2022-12-13 10:56:29,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292406d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:56:29, skipping insertion in model container [2022-12-13 10:56:29,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:56:29" (3/3) ... [2022-12-13 10:56:29,809 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-12-13 10:56:29,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 10:56:29,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 10:56:29,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:56:29,863 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;@2a4261e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:56:29,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 10:56:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 10:56:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 10:56:29,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:29,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:29,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2022-12-13 10:56:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:29,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494591118] [2022-12-13 10:56:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:29,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 10:56:30,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:30,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494591118] [2022-12-13 10:56:30,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494591118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:30,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:56:30,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 10:56:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336123163] [2022-12-13 10:56:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 10:56:30,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 10:56:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 10:56:30,185 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-12-13 10:56:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:30,223 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2022-12-13 10:56:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 10:56:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 22 [2022-12-13 10:56:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:30,230 INFO L225 Difference]: With dead ends: 64 [2022-12-13 10:56:30,230 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 10:56:30,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 10:56:30,234 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:30,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 10:56:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 10:56:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-13 10:56:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 10:56:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-12-13 10:56:30,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2022-12-13 10:56:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:30,260 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-12-13 10:56:30,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-12-13 10:56:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-12-13 10:56:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 10:56:30,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:30,262 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:30,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 10:56:30,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2022-12-13 10:56:30,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:30,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015954934] [2022-12-13 10:56:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:30,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 10:56:30,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:30,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015954934] [2022-12-13 10:56:30,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015954934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:56:30,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:56:30,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 10:56:30,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213919782] [2022-12-13 10:56:30,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:56:30,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 10:56:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 10:56:30,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 10:56:30,358 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 10:56:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:30,430 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-12-13 10:56:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 10:56:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-12-13 10:56:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:30,431 INFO L225 Difference]: With dead ends: 50 [2022-12-13 10:56:30,432 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 10:56:30,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 10:56:30,433 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:30,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 10:56:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 10:56:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-12-13 10:56:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 10:56:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-12-13 10:56:30,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-12-13 10:56:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:30,440 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-12-13 10:56:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 10:56:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-12-13 10:56:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 10:56:30,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:30,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:30,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 10:56:30,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2022-12-13 10:56:30,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:30,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418757123] [2022-12-13 10:56:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:30,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 10:56:30,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:30,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418757123] [2022-12-13 10:56:30,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418757123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:30,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320902005] [2022-12-13 10:56:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:30,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:30,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:30,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 10:56:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 10:56:31,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:31,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 10:56:31,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 10:56:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 10:56:31,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:33,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 10:56:33,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-12-13 10:56:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 10:56:33,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320902005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:56:33,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:56:33,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-12-13 10:56:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924334864] [2022-12-13 10:56:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 10:56:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 10:56:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2022-12-13 10:56:33,447 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 10:56:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:33,678 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-12-13 10:56:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 10:56:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-12-13 10:56:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:33,679 INFO L225 Difference]: With dead ends: 54 [2022-12-13 10:56:33,679 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 10:56:33,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2022-12-13 10:56:33,680 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:33,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 10:56:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 10:56:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-12-13 10:56:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 10:56:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-12-13 10:56:33,686 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-12-13 10:56:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:33,687 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-12-13 10:56:33,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 10:56:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-12-13 10:56:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 10:56:33,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:33,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:33,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 10:56:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 10:56:33,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2022-12-13 10:56:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:33,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571649221] [2022-12-13 10:56:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:34,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:34,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 10:56:34,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571649221] [2022-12-13 10:56:34,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571649221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:34,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612980010] [2022-12-13 10:56:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:34,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:34,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:34,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 10:56:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 10:56:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:34,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 10:56:34,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 10:56:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 10:56:34,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:34,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 10:56:34,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-12-13 10:56:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 10:56:34,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612980010] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:56:34,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:56:34,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-12-13 10:56:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757447772] [2022-12-13 10:56:34,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:34,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 10:56:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 10:56:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-12-13 10:56:34,762 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 10:56:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:34,983 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-12-13 10:56:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 10:56:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-12-13 10:56:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:34,985 INFO L225 Difference]: With dead ends: 68 [2022-12-13 10:56:34,986 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 10:56:34,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-12-13 10:56:34,987 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:34,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 10:56:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 10:56:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-12-13 10:56:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 10:56:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-12-13 10:56:34,995 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-12-13 10:56:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:34,996 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-12-13 10:56:34,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 10:56:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-12-13 10:56:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 10:56:34,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:34,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:35,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 10:56:35,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:35,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2022-12-13 10:56:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:35,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549832458] [2022-12-13 10:56:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:35,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 10:56:35,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549832458] [2022-12-13 10:56:35,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549832458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:35,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337594202] [2022-12-13 10:56:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:56:35,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:35,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:35,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 10:56:35,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 10:56:35,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:35,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 10:56:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 10:56:35,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 10:56:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337594202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:56:35,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:56:35,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 10:56:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228359929] [2022-12-13 10:56:35,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 10:56:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 10:56:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 10:56:35,507 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 10:56:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:35,602 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2022-12-13 10:56:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 10:56:35,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-12-13 10:56:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:35,603 INFO L225 Difference]: With dead ends: 88 [2022-12-13 10:56:35,603 INFO L226 Difference]: Without dead ends: 69 [2022-12-13 10:56:35,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 10:56:35,603 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:35,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 83 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 10:56:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-13 10:56:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-12-13 10:56:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 10:56:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-12-13 10:56:35,609 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2022-12-13 10:56:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:35,610 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-12-13 10:56:35,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 10:56:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-12-13 10:56:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 10:56:35,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:35,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:35,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 10:56:35,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:35,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2022-12-13 10:56:35,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:35,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126403252] [2022-12-13 10:56:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:56:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 10:56:35,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:35,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126403252] [2022-12-13 10:56:35,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126403252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:35,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553470835] [2022-12-13 10:56:35,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 10:56:35,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:35,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:35,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 10:56:35,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 10:56:35,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:35,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 10:56:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 10:56:35,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 10:56:36,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553470835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:56:36,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:56:36,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 10:56:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864692523] [2022-12-13 10:56:36,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:36,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 10:56:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 10:56:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 10:56:36,036 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 10:56:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:36,164 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-12-13 10:56:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 10:56:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-12-13 10:56:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:36,166 INFO L225 Difference]: With dead ends: 59 [2022-12-13 10:56:36,166 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 10:56:36,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 10:56:36,167 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:36,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 10:56:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 10:56:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-12-13 10:56:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 10:56:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-12-13 10:56:36,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2022-12-13 10:56:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:36,174 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-12-13 10:56:36,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 10:56:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-12-13 10:56:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 10:56:36,174 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:36,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:36,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 10:56:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 10:56:36,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:36,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2022-12-13 10:56:36,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:36,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188951457] [2022-12-13 10:56:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:36,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:56:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 10:56:37,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:37,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188951457] [2022-12-13 10:56:37,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188951457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:37,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362136842] [2022-12-13 10:56:37,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 10:56:37,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:37,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:37,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:37,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 10:56:37,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 10:56:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:37,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 10:56:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:37,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:56:37,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:37,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:37,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:56:37,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-12-13 10:56:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:38,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2022-12-13 10:56:38,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2022-12-13 10:56:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 10:56:38,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:39,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362136842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:39,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:56:39,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2022-12-13 10:56:39,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792356484] [2022-12-13 10:56:39,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:39,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 10:56:39,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:39,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 10:56:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 10:56:39,700 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:42,274 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2022-12-13 10:56:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 10:56:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-12-13 10:56:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:42,276 INFO L225 Difference]: With dead ends: 96 [2022-12-13 10:56:42,276 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 10:56:42,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=841, Invalid=5479, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 10:56:42,277 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:42,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 335 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 10:56:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 10:56:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2022-12-13 10:56:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 10:56:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2022-12-13 10:56:42,285 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2022-12-13 10:56:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:42,285 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2022-12-13 10:56:42,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2022-12-13 10:56:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 10:56:42,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:42,286 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:42,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 10:56:42,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:42,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2022-12-13 10:56:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:42,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268208372] [2022-12-13 10:56:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:43,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:43,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:56:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 10:56:43,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268208372] [2022-12-13 10:56:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268208372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530001090] [2022-12-13 10:56:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:43,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:43,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:43,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 10:56:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:43,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 10:56:43,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:43,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:56:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:43,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:56:43,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-13 10:56:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:43,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-12-13 10:56:44,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-12-13 10:56:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 10:56:44,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530001090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:45,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:56:45,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2022-12-13 10:56:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127032838] [2022-12-13 10:56:45,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 10:56:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 10:56:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 10:56:45,046 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:48,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:56:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:48,699 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2022-12-13 10:56:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 10:56:48,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-12-13 10:56:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:48,700 INFO L225 Difference]: With dead ends: 100 [2022-12-13 10:56:48,700 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 10:56:48,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 10:56:48,701 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:48,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 290 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 896 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-12-13 10:56:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 10:56:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2022-12-13 10:56:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-12-13 10:56:48,710 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 50 [2022-12-13 10:56:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:48,711 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-12-13 10:56:48,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-12-13 10:56:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 10:56:48,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:48,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:48,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 10:56:48,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:48,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2022-12-13 10:56:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:48,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962708434] [2022-12-13 10:56:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:48,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:49,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:49,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:56:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 10:56:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962708434] [2022-12-13 10:56:49,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962708434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140117236] [2022-12-13 10:56:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:56:49,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:49,870 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:49,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 10:56:49,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 10:56:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 10:56:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:50,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:56:50,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:50,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:56:50,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-12-13 10:56:50,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:50,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2022-12-13 10:56:51,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2022-12-13 10:56:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 10:56:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:56:53,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140117236] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:53,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:56:53,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2022-12-13 10:56:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793687891] [2022-12-13 10:56:53,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:56:53,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 10:56:53,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:56:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 10:56:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2698, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 10:56:53,259 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:56:55,642 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2022-12-13 10:56:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 10:56:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-12-13 10:56:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:56:55,643 INFO L225 Difference]: With dead ends: 135 [2022-12-13 10:56:55,643 INFO L226 Difference]: Without dead ends: 131 [2022-12-13 10:56:55,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=813, Invalid=5829, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 10:56:55,645 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 10:56:55,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 200 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 10:56:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-13 10:56:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2022-12-13 10:56:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 10:56:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2022-12-13 10:56:55,662 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 50 [2022-12-13 10:56:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:56:55,662 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2022-12-13 10:56:55,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:56:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2022-12-13 10:56:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 10:56:55,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:56:55,664 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:56:55,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 10:56:55,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:55,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:56:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:56:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2022-12-13 10:56:55,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:56:55,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775682196] [2022-12-13 10:56:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:56:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:56:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:56,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:56:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:56,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:56:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:56:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:56,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:56:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:56:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 10:56:56,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:56:56,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775682196] [2022-12-13 10:56:56,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775682196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:56:56,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620728319] [2022-12-13 10:56:56,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 10:56:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:56:56,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:56:56,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:56:56,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 10:56:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 10:56:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:56:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 10:56:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:56:56,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:56:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:57,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:56:57,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-12-13 10:56:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:56:57,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-12-13 10:56:57,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-12-13 10:56:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 10:56:57,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:00,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620728319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:00,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:57:00,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-12-13 10:57:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093882328] [2022-12-13 10:57:00,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:00,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 10:57:00,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 10:57:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2048, Unknown=1, NotChecked=0, Total=2256 [2022-12-13 10:57:00,216 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:57:03,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:06,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:57:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:57:07,005 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2022-12-13 10:57:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 10:57:07,005 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-12-13 10:57:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:57:07,006 INFO L225 Difference]: With dead ends: 163 [2022-12-13 10:57:07,006 INFO L226 Difference]: Without dead ends: 157 [2022-12-13 10:57:07,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=794, Invalid=5525, Unknown=1, NotChecked=0, Total=6320 [2022-12-13 10:57:07,008 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 79 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 115 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-13 10:57:07,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 337 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1232 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-12-13 10:57:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-12-13 10:57:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 90. [2022-12-13 10:57:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:57:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2022-12-13 10:57:07,026 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 50 [2022-12-13 10:57:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:57:07,027 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2022-12-13 10:57:07,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 10:57:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2022-12-13 10:57:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 10:57:07,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:57:07,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:07,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 10:57:07,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 10:57:07,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:57:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:07,231 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2022-12-13 10:57:07,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:07,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270392916] [2022-12-13 10:57:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:07,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:57:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:57:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:57:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:57:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 10:57:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270392916] [2022-12-13 10:57:07,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270392916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304107233] [2022-12-13 10:57:07,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 10:57:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:57:07,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:57:07,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 10:57:07,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 10:57:07,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:57:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 10:57:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:57:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 10:57:07,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 10:57:07,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304107233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:57:07,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:57:07,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 10:57:07,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878202968] [2022-12-13 10:57:07,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:07,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 10:57:07,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 10:57:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 10:57:07,524 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 10:57:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:57:07,664 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2022-12-13 10:57:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 10:57:07,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2022-12-13 10:57:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:57:07,665 INFO L225 Difference]: With dead ends: 176 [2022-12-13 10:57:07,665 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 10:57:07,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-13 10:57:07,665 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:57:07,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 87 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 10:57:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 10:57:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2022-12-13 10:57:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:57:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2022-12-13 10:57:07,680 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 52 [2022-12-13 10:57:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:57:07,680 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2022-12-13 10:57:07,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 10:57:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2022-12-13 10:57:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 10:57:07,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:57:07,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:07,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 10:57:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 10:57:07,883 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:57:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2022-12-13 10:57:07,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:07,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517836071] [2022-12-13 10:57:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:07,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:57:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:57:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:57:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:57:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:07,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:57:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 10:57:08,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:08,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517836071] [2022-12-13 10:57:08,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517836071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:08,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684973614] [2022-12-13 10:57:08,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 10:57:08,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:57:08,002 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:57:08,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 10:57:08,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 10:57:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:57:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 10:57:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:57:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 10:57:08,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 10:57:08,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684973614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:57:08,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:57:08,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 10:57:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721143965] [2022-12-13 10:57:08,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:08,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 10:57:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 10:57:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 10:57:08,194 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 10:57:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:57:08,322 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-12-13 10:57:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 10:57:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-12-13 10:57:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:57:08,323 INFO L225 Difference]: With dead ends: 118 [2022-12-13 10:57:08,323 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 10:57:08,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-12-13 10:57:08,323 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:57:08,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 10:57:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 10:57:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2022-12-13 10:57:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 10:57:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-12-13 10:57:08,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2022-12-13 10:57:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:57:08,332 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-12-13 10:57:08,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 10:57:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-12-13 10:57:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 10:57:08,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:57:08,333 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:08,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 10:57:08,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 10:57:08,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:57:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2022-12-13 10:57:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224310904] [2022-12-13 10:57:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:08,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:57:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:57:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:57:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:57:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:57:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 10:57:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:10,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224310904] [2022-12-13 10:57:10,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224310904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:10,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892497695] [2022-12-13 10:57:10,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 10:57:10,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:57:10,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:57:10,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 10:57:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-13 10:57:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:57:10,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:57:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:10,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:57:10,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-12-13 10:57:11,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:57:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:11,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2022-12-13 10:57:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:11,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-12-13 10:57:12,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-12-13 10:57:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 10:57:12,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:18,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892497695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:18,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:57:18,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2022-12-13 10:57:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310315339] [2022-12-13 10:57:18,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 10:57:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 10:57:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3971, Unknown=1, NotChecked=0, Total=4290 [2022-12-13 10:57:18,082 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:57:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:57:24,733 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2022-12-13 10:57:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 10:57:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 10:57:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:57:24,735 INFO L225 Difference]: With dead ends: 164 [2022-12-13 10:57:24,735 INFO L226 Difference]: Without dead ends: 158 [2022-12-13 10:57:24,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1557, Invalid=14954, Unknown=1, NotChecked=0, Total=16512 [2022-12-13 10:57:24,737 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 205 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 10:57:24,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 485 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 10:57:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-13 10:57:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2022-12-13 10:57:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 10:57:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2022-12-13 10:57:24,762 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 64 [2022-12-13 10:57:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:57:24,763 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2022-12-13 10:57:24,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:57:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2022-12-13 10:57:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 10:57:24,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:57:24,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:24,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 10:57:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:24,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:57:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:24,966 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2022-12-13 10:57:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830902299] [2022-12-13 10:57:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:57:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:57:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:57:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:57:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:57:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 10:57:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:26,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830902299] [2022-12-13 10:57:26,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830902299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:26,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969505141] [2022-12-13 10:57:26,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 10:57:26,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:57:26,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:57:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 10:57:26,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 10:57:26,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:57:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 10:57:26,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:57:26,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:57:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:57:27,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2022-12-13 10:57:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2022-12-13 10:57:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:27,985 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2022-12-13 10:57:27,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 105 [2022-12-13 10:57:29,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:29,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:29,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:57:29,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 10:57:29,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 72 [2022-12-13 10:57:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 10:57:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:42,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969505141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:42,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:57:42,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2022-12-13 10:57:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557548409] [2022-12-13 10:57:42,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:42,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 10:57:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 10:57:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4950, Unknown=2, NotChecked=0, Total=5402 [2022-12-13 10:57:42,947 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:57:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:57:52,503 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2022-12-13 10:57:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 10:57:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 10:57:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:57:52,504 INFO L225 Difference]: With dead ends: 182 [2022-12-13 10:57:52,504 INFO L226 Difference]: Without dead ends: 156 [2022-12-13 10:57:52,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4492 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1936, Invalid=14574, Unknown=2, NotChecked=0, Total=16512 [2022-12-13 10:57:52,506 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 183 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 10:57:52,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 512 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 10:57:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-13 10:57:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2022-12-13 10:57:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.297029702970297) internal successors, (131), 101 states have internal predecessors, (131), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-13 10:57:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2022-12-13 10:57:52,538 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 64 [2022-12-13 10:57:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:57:52,538 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2022-12-13 10:57:52,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:57:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2022-12-13 10:57:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 10:57:52,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:57:52,539 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:57:52,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 10:57:52,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:52,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:57:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:57:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2022-12-13 10:57:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:57:52,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489081753] [2022-12-13 10:57:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:57:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:57:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:57:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:53,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:57:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:53,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:57:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:53,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:57:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:57:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:57:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 10:57:53,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:57:53,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489081753] [2022-12-13 10:57:53,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489081753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309456754] [2022-12-13 10:57:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 10:57:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:57:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:57:53,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:57:53,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 10:57:54,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 10:57:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:57:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 10:57:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:57:54,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:57:54,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:57:54,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-12-13 10:57:54,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:57:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:54,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-12-13 10:57:55,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:55,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:57:55,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-12-13 10:57:55,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-12-13 10:57:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 10:57:55,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:57:57,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309456754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:57:57,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:57:57,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2022-12-13 10:57:57,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049128376] [2022-12-13 10:57:57,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:57:57,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 10:57:57,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:57:57,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 10:57:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4109, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 10:57:57,344 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:58:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:58:02,341 INFO L93 Difference]: Finished difference Result 175 states and 227 transitions. [2022-12-13 10:58:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 10:58:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 10:58:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:58:02,342 INFO L225 Difference]: With dead ends: 175 [2022-12-13 10:58:02,342 INFO L226 Difference]: Without dead ends: 148 [2022-12-13 10:58:02,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1230, Invalid=9482, Unknown=0, NotChecked=0, Total=10712 [2022-12-13 10:58:02,343 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 10:58:02,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 10:58:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-13 10:58:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 131. [2022-12-13 10:58:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 115 states have internal predecessors, (148), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 10:58:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 174 transitions. [2022-12-13 10:58:02,384 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 174 transitions. Word has length 64 [2022-12-13 10:58:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:58:02,385 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 174 transitions. [2022-12-13 10:58:02,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:58:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 174 transitions. [2022-12-13 10:58:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 10:58:02,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:58:02,385 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:02,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 10:58:02,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 10:58:02,587 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:58:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2022-12-13 10:58:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479886985] [2022-12-13 10:58:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:03,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:58:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:03,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:58:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:58:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:58:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:03,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:58:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 10:58:03,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:03,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479886985] [2022-12-13 10:58:03,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479886985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:03,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368223607] [2022-12-13 10:58:03,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 10:58:03,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:03,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:03,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 10:58:03,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 10:58:03,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 10:58:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:04,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 10:58:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:58:04,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2022-12-13 10:58:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:58:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:04,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2022-12-13 10:58:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:05,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-12-13 10:58:05,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-12-13 10:58:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 10:58:05,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:09,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368223607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:09,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:58:09,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2022-12-13 10:58:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763750709] [2022-12-13 10:58:09,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:09,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 10:58:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:09,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 10:58:09,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3744, Unknown=1, NotChecked=0, Total=4032 [2022-12-13 10:58:09,838 INFO L87 Difference]: Start difference. First operand 131 states and 174 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:58:14,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:19,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 10:58:19,631 INFO L93 Difference]: Finished difference Result 196 states and 253 transitions. [2022-12-13 10:58:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 10:58:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 10:58:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 10:58:19,632 INFO L225 Difference]: With dead ends: 196 [2022-12-13 10:58:19,632 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 10:58:19,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1129, Invalid=10000, Unknown=1, NotChecked=0, Total=11130 [2022-12-13 10:58:19,633 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-13 10:58:19,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 438 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2185 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-12-13 10:58:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 10:58:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2022-12-13 10:58:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 123 states have (on average 1.2926829268292683) internal successors, (159), 123 states have internal predecessors, (159), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 10:58:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2022-12-13 10:58:19,671 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 64 [2022-12-13 10:58:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 10:58:19,671 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2022-12-13 10:58:19,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:58:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2022-12-13 10:58:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 10:58:19,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 10:58:19,672 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:58:19,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 10:58:19,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 10:58:19,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 10:58:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:58:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2022-12-13 10:58:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:58:19,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843342813] [2022-12-13 10:58:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:58:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:58:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 10:58:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:21,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 10:58:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:21,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 10:58:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 10:58:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:21,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 10:58:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:58:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 10:58:21,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:58:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843342813] [2022-12-13 10:58:21,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843342813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:21,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287627250] [2022-12-13 10:58:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 10:58:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:58:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:58:21,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:58:21,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 10:58:21,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 10:58:21,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 10:58:21,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 10:58:21,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:58:21,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 10:58:27,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:58:27,768 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-12-13 10:58:27,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 64 [2022-12-13 10:58:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,043 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-12-13 10:58:28,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 83 [2022-12-13 10:58:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:28,273 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-13 10:58:28,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 96 [2022-12-13 10:58:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:29,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:58:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 10:58:29,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 10:58:29,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 10:58:29,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 85 [2022-12-13 10:58:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 10:58:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:58:34,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287627250] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:58:34,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 10:58:34,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 60 [2022-12-13 10:58:34,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859292022] [2022-12-13 10:58:34,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 10:58:34,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 10:58:34,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:58:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 10:58:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=5619, Unknown=4, NotChecked=0, Total=6320 [2022-12-13 10:58:34,988 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 10:58:36,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:38,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:41,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:53,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:58:56,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:06,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:36,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:38,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:40,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:43,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:49,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 10:59:53,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:00:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:03,269 INFO L93 Difference]: Finished difference Result 416 states and 548 transitions. [2022-12-13 11:00:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-13 11:00:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 11:00:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:03,271 INFO L225 Difference]: With dead ends: 416 [2022-12-13 11:00:03,271 INFO L226 Difference]: Without dead ends: 410 [2022-12-13 11:00:03,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7491 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=2969, Invalid=22771, Unknown=20, NotChecked=0, Total=25760 [2022-12-13 11:00:03,273 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 188 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 167 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:03,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 599 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2311 Invalid, 12 Unknown, 0 Unchecked, 24.9s Time] [2022-12-13 11:00:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-12-13 11:00:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 184. [2022-12-13 11:00:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.34375) internal successors, (215), 160 states have internal predecessors, (215), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-13 11:00:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 255 transitions. [2022-12-13 11:00:03,334 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 255 transitions. Word has length 64 [2022-12-13 11:00:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:03,334 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 255 transitions. [2022-12-13 11:00:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:00:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 255 transitions. [2022-12-13 11:00:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 11:00:03,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:03,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:03,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 11:00:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:00:03,536 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2022-12-13 11:00:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968909890] [2022-12-13 11:00:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:04,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:00:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:04,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:00:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:04,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:00:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:04,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:00:04,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968909890] [2022-12-13 11:00:04,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968909890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566743190] [2022-12-13 11:00:04,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:00:04,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:04,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:04,980 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:04,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:00:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 11:00:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:05,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:00:05,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:00:05,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-12-13 11:00:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:00:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:05,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-12-13 11:00:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:06,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2022-12-13 11:00:06,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 39 [2022-12-13 11:00:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:00:06,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:12,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566743190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:12,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:00:12,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2022-12-13 11:00:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390000912] [2022-12-13 11:00:12,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:12,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 11:00:12,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 11:00:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4105, Unknown=2, NotChecked=0, Total=4422 [2022-12-13 11:00:12,882 INFO L87 Difference]: Start difference. First operand 184 states and 255 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:00:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:18,990 INFO L93 Difference]: Finished difference Result 316 states and 417 transitions. [2022-12-13 11:00:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 11:00:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 11:00:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:18,992 INFO L225 Difference]: With dead ends: 316 [2022-12-13 11:00:18,992 INFO L226 Difference]: Without dead ends: 284 [2022-12-13 11:00:18,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1287, Invalid=11593, Unknown=2, NotChecked=0, Total=12882 [2022-12-13 11:00:18,993 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 176 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:18,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 507 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 11:00:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-13 11:00:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 214. [2022-12-13 11:00:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 186 states have internal predecessors, (252), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-13 11:00:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2022-12-13 11:00:19,064 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 64 [2022-12-13 11:00:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:19,064 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2022-12-13 11:00:19,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:00:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2022-12-13 11:00:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 11:00:19,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:19,065 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:19,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:00:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:00:19,267 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2022-12-13 11:00:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019459369] [2022-12-13 11:00:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:00:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:00:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:00:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:00:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019459369] [2022-12-13 11:00:20,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019459369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959190427] [2022-12-13 11:00:20,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:00:20,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:20,604 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:20,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:00:20,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:00:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:00:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 11:00:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:20,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:00:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:00:21,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-12-13 11:00:21,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:00:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:21,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-12-13 11:00:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:22,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-12-13 11:00:22,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-12-13 11:00:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 11:00:22,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:27,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959190427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:27,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:00:27,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 57 [2022-12-13 11:00:27,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465178219] [2022-12-13 11:00:27,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 11:00:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 11:00:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4885, Unknown=1, NotChecked=0, Total=5256 [2022-12-13 11:00:27,892 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:00:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:00:36,370 INFO L93 Difference]: Finished difference Result 323 states and 424 transitions. [2022-12-13 11:00:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 11:00:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 11:00:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:00:36,371 INFO L225 Difference]: With dead ends: 323 [2022-12-13 11:00:36,372 INFO L226 Difference]: Without dead ends: 317 [2022-12-13 11:00:36,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1665, Invalid=16694, Unknown=1, NotChecked=0, Total=18360 [2022-12-13 11:00:36,373 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:00:36,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 457 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 11:00:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-12-13 11:00:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2022-12-13 11:00:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 189 states have (on average 1.3544973544973544) internal successors, (256), 189 states have internal predecessors, (256), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 11:00:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 304 transitions. [2022-12-13 11:00:36,456 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 304 transitions. Word has length 64 [2022-12-13 11:00:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:00:36,456 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 304 transitions. [2022-12-13 11:00:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:00:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 304 transitions. [2022-12-13 11:00:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 11:00:36,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:00:36,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:36,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 11:00:36,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:36,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:00:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2022-12-13 11:00:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320678268] [2022-12-13 11:00:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:38,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:00:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:38,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:00:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:00:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:38,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:00:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:00:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:00:38,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320678268] [2022-12-13 11:00:38,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320678268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284763140] [2022-12-13 11:00:38,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:00:38,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:38,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:38,040 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:38,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:00:38,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 11:00:38,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:00:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 11:00:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:38,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:00:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:00:39,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2022-12-13 11:00:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2022-12-13 11:00:39,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:39,443 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2022-12-13 11:00:39,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2022-12-13 11:00:40,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:40,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:40,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:00:40,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:00:40,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 [2022-12-13 11:00:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:00:41,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:54,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284763140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:54,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:00:54,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2022-12-13 11:00:54,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355417091] [2022-12-13 11:00:54,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:54,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 11:00:54,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 11:00:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4796, Unknown=2, NotChecked=0, Total=5256 [2022-12-13 11:00:54,153 INFO L87 Difference]: Start difference. First operand 218 states and 304 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:01:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:01:04,432 INFO L93 Difference]: Finished difference Result 280 states and 376 transitions. [2022-12-13 11:01:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 11:01:04,432 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-12-13 11:01:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:01:04,433 INFO L225 Difference]: With dead ends: 280 [2022-12-13 11:01:04,433 INFO L226 Difference]: Without dead ends: 257 [2022-12-13 11:01:04,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1726, Invalid=12792, Unknown=2, NotChecked=0, Total=14520 [2022-12-13 11:01:04,434 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 123 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:01:04,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 362 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-13 11:01:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-13 11:01:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 220. [2022-12-13 11:01:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 191 states have (on average 1.350785340314136) internal successors, (258), 191 states have internal predecessors, (258), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 11:01:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 306 transitions. [2022-12-13 11:01:04,521 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 306 transitions. Word has length 64 [2022-12-13 11:01:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:01:04,521 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 306 transitions. [2022-12-13 11:01:04,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:01:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 306 transitions. [2022-12-13 11:01:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 11:01:04,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:01:04,522 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:04,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 11:01:04,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:04,724 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:01:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash -584834725, now seen corresponding path program 8 times [2022-12-13 11:01:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039758292] [2022-12-13 11:01:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:04,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:01:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:01:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:04,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:01:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:04,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:01:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:04,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:01:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 11:01:04,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039758292] [2022-12-13 11:01:04,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039758292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:01:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943289301] [2022-12-13 11:01:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:01:04,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:04,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:01:04,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:01:04,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:01:04,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:01:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:01:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:01:04,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 11:01:04,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:01:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-13 11:01:05,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943289301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:01:05,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:01:05,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 11:01:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422201025] [2022-12-13 11:01:05,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:01:05,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:01:05,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:01:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:01:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:01:05,040 INFO L87 Difference]: Start difference. First operand 220 states and 306 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 11:01:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:01:05,403 INFO L93 Difference]: Finished difference Result 363 states and 479 transitions. [2022-12-13 11:01:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:01:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2022-12-13 11:01:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:01:05,404 INFO L225 Difference]: With dead ends: 363 [2022-12-13 11:01:05,404 INFO L226 Difference]: Without dead ends: 297 [2022-12-13 11:01:05,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-12-13 11:01:05,405 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:01:05,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 141 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:01:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-13 11:01:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 208. [2022-12-13 11:01:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.3314917127071824) internal successors, (241), 181 states have internal predecessors, (241), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-13 11:01:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 285 transitions. [2022-12-13 11:01:05,499 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 285 transitions. Word has length 66 [2022-12-13 11:01:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:01:05,499 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 285 transitions. [2022-12-13 11:01:05,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 11:01:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 285 transitions. [2022-12-13 11:01:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 11:01:05,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:01:05,500 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:05,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 11:01:05,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 11:01:05,702 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:01:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1051375952, now seen corresponding path program 9 times [2022-12-13 11:01:05,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:05,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553386342] [2022-12-13 11:01:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:05,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:01:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:01:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:01:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:01:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:01:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 11:01:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 11:01:05,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:05,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553386342] [2022-12-13 11:01:05,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553386342] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:01:05,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000215676] [2022-12-13 11:01:05,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:01:05,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:01:05,830 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:01:05,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:01:05,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:01:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:01:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:01:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 11:01:05,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:01:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 11:01:06,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000215676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:01:06,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:01:06,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 11:01:06,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751444177] [2022-12-13 11:01:06,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:01:06,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:01:06,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:01:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:01:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:01:06,067 INFO L87 Difference]: Start difference. First operand 208 states and 285 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:01:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:01:06,351 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2022-12-13 11:01:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:01:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2022-12-13 11:01:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:01:06,352 INFO L225 Difference]: With dead ends: 222 [2022-12-13 11:01:06,352 INFO L226 Difference]: Without dead ends: 210 [2022-12-13 11:01:06,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:01:06,353 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 67 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:01:06,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 138 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:01:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-13 11:01:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 89. [2022-12-13 11:01:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:01:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2022-12-13 11:01:06,398 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 74 [2022-12-13 11:01:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:01:06,398 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2022-12-13 11:01:06,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:01:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2022-12-13 11:01:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 11:01:06,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:01:06,399 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:06,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 11:01:06,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:06,601 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:01:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash -517304264, now seen corresponding path program 9 times [2022-12-13 11:01:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:01:06,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363446685] [2022-12-13 11:01:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:06,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:01:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:01:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:01:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:01:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:01:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:01:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 11:01:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 11:01:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:01:09,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363446685] [2022-12-13 11:01:09,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363446685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:01:09,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593431282] [2022-12-13 11:01:09,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:01:09,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:01:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:01:09,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:01:09,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:01:09,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:01:09,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:01:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 11:01:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:09,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:02:00,004 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-12-13 11:02:00,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 93 [2022-12-13 11:02:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:00,327 INFO L321 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-12-13 11:02:00,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 108 [2022-12-13 11:02:00,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:00,555 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-13 11:02:00,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 138 treesize of output 147 [2022-12-13 11:02:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:01,052 INFO L321 Elim1Store]: treesize reduction 278, result has 9.4 percent of original size [2022-12-13 11:02:01,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 32 case distinctions, treesize of input 182 treesize of output 173 [2022-12-13 11:02:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:17,967 INFO L321 Elim1Store]: treesize reduction 192, result has 27.5 percent of original size [2022-12-13 11:02:17,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 31 case distinctions, treesize of input 197 treesize of output 117 [2022-12-13 11:02:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 78 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:02:18,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:03:00,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593431282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:03:00,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:03:00,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 43] total 75 [2022-12-13 11:03:00,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026053596] [2022-12-13 11:03:00,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:03:00,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 11:03:00,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:03:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 11:03:00,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=967, Invalid=8504, Unknown=35, NotChecked=0, Total=9506 [2022-12-13 11:03:00,312 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 75 states, 75 states have (on average 1.4) internal successors, (105), 73 states have internal predecessors, (105), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 11:03:02,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:05,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:07,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:09,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:11,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:13,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:17,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:21,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:26,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:29,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:31,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:35,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:40,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:49,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:03:51,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:04:29,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:04:34,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:04:36,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:04:45,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:04:47,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:04:56,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:05,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:16,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:25,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:33,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:41,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:43,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:05:48,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:06:06,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:06:19,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:07,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:09,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:11,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:14,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:23,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:31,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:41,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:43,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:45,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:47,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:50,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:07:52,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:08:52,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:08:54,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:09:35,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:09:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:09:47,689 INFO L93 Difference]: Finished difference Result 402 states and 542 transitions. [2022-12-13 11:09:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-12-13 11:09:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 73 states have internal predecessors, (105), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2022-12-13 11:09:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:09:47,693 INFO L225 Difference]: With dead ends: 402 [2022-12-13 11:09:47,693 INFO L226 Difference]: Without dead ends: 394 [2022-12-13 11:09:47,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16748 ImplicationChecksByTransitivity, 413.3s TimeCoverageRelationStatistics Valid=5308, Invalid=50041, Unknown=111, NotChecked=0, Total=55460 [2022-12-13 11:09:47,696 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 253 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 4504 mSolverCounterSat, 198 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 4746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 4504 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:09:47,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 854 Invalid, 4746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 4504 Invalid, 44 Unknown, 0 Unchecked, 103.1s Time] [2022-12-13 11:09:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-13 11:09:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2022-12-13 11:09:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 247 states have (on average 1.3927125506072875) internal successors, (344), 249 states have internal predecessors, (344), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-13 11:09:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 414 transitions. [2022-12-13 11:09:47,869 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 414 transitions. Word has length 78 [2022-12-13 11:09:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:09:47,869 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 414 transitions. [2022-12-13 11:09:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 73 states have internal predecessors, (105), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 11:09:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 414 transitions. [2022-12-13 11:09:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 11:09:47,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:09:47,870 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:47,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 11:09:48,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:48,071 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:09:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash -455264650, now seen corresponding path program 10 times [2022-12-13 11:09:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:48,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215087607] [2022-12-13 11:09:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:48,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:09:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:09:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:09:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:09:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:09:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 11:09:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 11:09:52,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215087607] [2022-12-13 11:09:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215087607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890298092] [2022-12-13 11:09:52,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:09:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:52,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:52,440 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:52,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:09:52,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:09:52,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 11:09:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:52,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 11:09:55,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:09:55,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-12-13 11:09:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:09:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:55,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 91 [2022-12-13 11:09:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:09:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 95 [2022-12-13 11:09:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:09:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:09:56,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 120 [2022-12-13 11:09:59,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 55 [2022-12-13 11:09:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:09:59,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890298092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:15,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:10:15,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 68 [2022-12-13 11:10:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259496502] [2022-12-13 11:10:15,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 11:10:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 11:10:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=6823, Unknown=2, NotChecked=0, Total=7310 [2022-12-13 11:10:15,828 INFO L87 Difference]: Start difference. First operand 290 states and 414 transitions. Second operand has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 11:10:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:10:33,263 INFO L93 Difference]: Finished difference Result 457 states and 637 transitions. [2022-12-13 11:10:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 11:10:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2022-12-13 11:10:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:10:33,265 INFO L225 Difference]: With dead ends: 457 [2022-12-13 11:10:33,265 INFO L226 Difference]: Without dead ends: 451 [2022-12-13 11:10:33,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6013 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=1430, Invalid=17474, Unknown=2, NotChecked=0, Total=18906 [2022-12-13 11:10:33,267 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 170 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:10:33,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 556 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-13 11:10:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-12-13 11:10:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 350. [2022-12-13 11:10:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 298 states have (on average 1.3993288590604027) internal successors, (417), 301 states have internal predecessors, (417), 42 states have call successors, (42), 9 states have call predecessors, (42), 9 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-13 11:10:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 501 transitions. [2022-12-13 11:10:33,524 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 501 transitions. Word has length 78 [2022-12-13 11:10:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:10:33,524 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 501 transitions. [2022-12-13 11:10:33,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 11:10:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 501 transitions. [2022-12-13 11:10:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 11:10:33,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:10:33,525 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:33,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:10:33,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 11:10:33,726 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:10:33,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:33,727 INFO L85 PathProgramCache]: Analyzing trace with hash -911671050, now seen corresponding path program 11 times [2022-12-13 11:10:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:33,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235728058] [2022-12-13 11:10:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:33,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:10:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 11:10:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:10:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:10:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:10:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 11:10:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 11:10:38,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235728058] [2022-12-13 11:10:38,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235728058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:38,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706970269] [2022-12-13 11:10:38,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:10:38,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:38,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:38,021 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:38,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d76819f-8f1e-4601-8ec5-85fd01793ef4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:10:38,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 11:10:38,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 11:10:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:38,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 11:10:40,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:40,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:10:40,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2022-12-13 11:10:41,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:10:41,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:41,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:41,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 93 [2022-12-13 11:10:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:41,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:10:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:10:41,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:10:41,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 113 [2022-12-13 11:10:42,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:10:42,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 93 [2022-12-13 11:10:44,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:10:44,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 42 [2022-12-13 11:10:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 84 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 11:10:44,649 INFO L328 TraceCheckSpWp]: Computing backward predicates...