./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:43:06,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:43:06,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:43:06,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:43:06,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:43:06,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:43:06,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:43:06,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:43:06,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:43:06,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:43:06,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:43:06,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:43:06,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:43:06,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:43:06,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:43:06,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:43:06,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:43:06,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:43:06,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:43:06,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:43:06,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:43:06,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:43:06,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:43:06,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:43:06,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:43:06,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:43:06,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:43:06,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:43:06,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:43:06,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:43:06,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:43:06,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:43:06,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:43:06,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:43:06,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:43:06,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:43:06,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:43:06,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:43:06,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:43:06,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:43:06,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:43:06,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:43:06,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:43:06,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:43:06,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:43:06,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:43:06,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:43:06,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:43:06,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:43:06,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:43:06,327 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:43:06,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:43:06,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:43:06,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:43:06,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:43:06,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:43:06,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:43:06,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:43:06,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:43:06,329 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:43:06,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:43:06,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:43:06,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:43:06,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:43:06,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:43:06,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:43:06,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:43:06,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:43:06,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:43:06,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:43:06,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:43:06,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:43:06,331 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:43:06,331 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:43:06,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:43:06,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:43:06,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2021-12-06 21:43:06,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:43:06,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:43:06,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:43:06,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:43:06,528 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:43:06,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-12-06 21:43:06,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/data/bcbdd8929/ab1e51c511d24994b13932d3e08258b6/FLAG839b1eb20 [2021-12-06 21:43:06,995 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:43:06,995 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/sv-benchmarks/c/heap-manipulation/dancing.i [2021-12-06 21:43:07,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/data/bcbdd8929/ab1e51c511d24994b13932d3e08258b6/FLAG839b1eb20 [2021-12-06 21:43:07,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/data/bcbdd8929/ab1e51c511d24994b13932d3e08258b6 [2021-12-06 21:43:07,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:43:07,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:43:07,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:43:07,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:43:07,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:43:07,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4380c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07, skipping insertion in model container [2021-12-06 21:43:07,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:43:07,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:43:07,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-12-06 21:43:07,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:43:07,283 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:43:07,292 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-12-06 21:43:07,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:43:07,334 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:43:07,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07 WrapperNode [2021-12-06 21:43:07,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:43:07,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:43:07,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:43:07,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:43:07,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,366 INFO L137 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2021-12-06 21:43:07,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:43:07,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:43:07,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:43:07,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:43:07,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:43:07,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:43:07,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:43:07,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:43:07,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (1/1) ... [2021-12-06 21:43:07,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:43:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:07,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:43:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:43:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-12-06 21:43:07,450 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-12-06 21:43:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 21:43:07,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 21:43:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:43:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:43:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:43:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:43:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:43:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:43:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:43:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:43:07,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:43:07,525 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:43:07,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:43:07,689 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:43:07,694 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:43:07,694 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 21:43:07,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:43:07 BoogieIcfgContainer [2021-12-06 21:43:07,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:43:07,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:43:07,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:43:07,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:43:07,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:43:07" (1/3) ... [2021-12-06 21:43:07,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48932b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:43:07, skipping insertion in model container [2021-12-06 21:43:07,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:43:07" (2/3) ... [2021-12-06 21:43:07,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48932b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:43:07, skipping insertion in model container [2021-12-06 21:43:07,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:43:07" (3/3) ... [2021-12-06 21:43:07,702 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-12-06 21:43:07,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:43:07,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:43:07,741 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:43:07,746 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:43:07,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:43:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:43:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:43:07,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:07,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:07,764 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1472755522, now seen corresponding path program 1 times [2021-12-06 21:43:07,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290942705] [2021-12-06 21:43:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:07,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:43:07,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:07,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290942705] [2021-12-06 21:43:07,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290942705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:07,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:07,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:43:07,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779641058] [2021-12-06 21:43:07,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:07,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:43:07,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:43:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:43:07,935 INFO L87 Difference]: Start difference. First operand has 41 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:43:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:07,959 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2021-12-06 21:43:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:43:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-06 21:43:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:07,968 INFO L225 Difference]: With dead ends: 77 [2021-12-06 21:43:07,968 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 21:43:07,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:43:07,975 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:07,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 21:43:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 21:43:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 21:43:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-12-06 21:43:08,007 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 20 [2021-12-06 21:43:08,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:08,007 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-12-06 21:43:08,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:43:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-12-06 21:43:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:43:08,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:08,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:08,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:43:08,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash -751028367, now seen corresponding path program 1 times [2021-12-06 21:43:08,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926506897] [2021-12-06 21:43:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:08,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:43:08,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:08,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926506897] [2021-12-06 21:43:08,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926506897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:08,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:08,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:43:08,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641675989] [2021-12-06 21:43:08,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:08,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:43:08,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:43:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:43:08,108 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:43:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:08,138 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-06 21:43:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:43:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-06 21:43:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:08,140 INFO L225 Difference]: With dead ends: 45 [2021-12-06 21:43:08,140 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 21:43:08,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:43:08,141 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:08,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 183 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 21:43:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-12-06 21:43:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 33 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:43:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-12-06 21:43:08,148 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 20 [2021-12-06 21:43:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:08,149 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-12-06 21:43:08,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:43:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-12-06 21:43:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 21:43:08,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:08,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:08,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:43:08,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 789210768, now seen corresponding path program 1 times [2021-12-06 21:43:08,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:08,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123586946] [2021-12-06 21:43:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:08,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 21:43:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:43:08,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123586946] [2021-12-06 21:43:08,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123586946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:08,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:08,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:43:08,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265253807] [2021-12-06 21:43:08,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:08,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:43:08,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:43:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:43:08,233 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:43:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:08,262 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2021-12-06 21:43:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:43:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-06 21:43:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:08,263 INFO L225 Difference]: With dead ends: 86 [2021-12-06 21:43:08,263 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 21:43:08,264 INFO L932 BasicCegarLoop]: 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 [2021-12-06 21:43:08,265 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:08,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 21:43:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-12-06 21:43:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.380952380952381) internal successors, (58), 44 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 21:43:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2021-12-06 21:43:08,272 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 26 [2021-12-06 21:43:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:08,273 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2021-12-06 21:43:08,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:43:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2021-12-06 21:43:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 21:43:08,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:08,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:08,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:43:08,274 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash 860755832, now seen corresponding path program 1 times [2021-12-06 21:43:08,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463490579] [2021-12-06 21:43:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:08,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 21:43:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:43:08,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463490579] [2021-12-06 21:43:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463490579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301359066] [2021-12-06 21:43:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:08,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:08,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:08,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:43:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:08,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:43:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:43:08,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:43:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301359066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:08,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 21:43:08,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156282155] [2021-12-06 21:43:08,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:43:08,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:43:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:43:08,669 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 21:43:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:08,856 INFO L93 Difference]: Finished difference Result 118 states and 165 transitions. [2021-12-06 21:43:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:43:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2021-12-06 21:43:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:08,859 INFO L225 Difference]: With dead ends: 118 [2021-12-06 21:43:08,859 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 21:43:08,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:43:08,860 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 132 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:08,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 366 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:43:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 21:43:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-12-06 21:43:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.375) internal successors, (66), 52 states have internal predecessors, (66), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (12), 7 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-06 21:43:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2021-12-06 21:43:08,872 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 29 [2021-12-06 21:43:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:08,872 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2021-12-06 21:43:08,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 21:43:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2021-12-06 21:43:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 21:43:08,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:08,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:08,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:43:09,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:09,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash 162961828, now seen corresponding path program 1 times [2021-12-06 21:43:09,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402352572] [2021-12-06 21:43:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:09,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:43:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:43:09,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:09,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402352572] [2021-12-06 21:43:09,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402352572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:09,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:09,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:43:09,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507182012] [2021-12-06 21:43:09,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:09,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:43:09,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:43:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:43:09,185 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:43:09,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:09,215 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2021-12-06 21:43:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:43:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-12-06 21:43:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:09,216 INFO L225 Difference]: With dead ends: 75 [2021-12-06 21:43:09,216 INFO L226 Difference]: Without dead ends: 73 [2021-12-06 21:43:09,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:43:09,217 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:09,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 301 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-06 21:43:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-06 21:43:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 58 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2021-12-06 21:43:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 101 transitions. [2021-12-06 21:43:09,226 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 101 transitions. Word has length 31 [2021-12-06 21:43:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:09,226 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 101 transitions. [2021-12-06 21:43:09,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:43:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 101 transitions. [2021-12-06 21:43:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 21:43:09,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:09,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2021-12-06 21:43:09,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:43:09,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 786337177, now seen corresponding path program 1 times [2021-12-06 21:43:09,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:09,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813781925] [2021-12-06 21:43:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:09,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:43:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:43:09,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813781925] [2021-12-06 21:43:09,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813781925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726721173] [2021-12-06 21:43:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:09,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:09,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:09,306 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:09,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:43:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 21:43:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:09,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:09,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:43:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:09,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:43:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-12-06 21:43:09,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-12-06 21:43:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:43:09,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:09,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 4 [2021-12-06 21:43:09,752 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 21:43:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-12-06 21:43:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 24 [2021-12-06 21:43:09,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 3 [2021-12-06 21:43:09,763 INFO L354 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2021-12-06 21:43:09,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 1 [2021-12-06 21:43:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:43:09,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726721173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:09,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:09,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 16 [2021-12-06 21:43:09,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179308718] [2021-12-06 21:43:09,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:09,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 21:43:09,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 21:43:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:43:09,785 INFO L87 Difference]: Start difference. First operand 71 states and 101 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 21:43:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:10,187 INFO L93 Difference]: Finished difference Result 269 states and 401 transitions. [2021-12-06 21:43:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 21:43:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2021-12-06 21:43:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:10,191 INFO L225 Difference]: With dead ends: 269 [2021-12-06 21:43:10,191 INFO L226 Difference]: Without dead ends: 198 [2021-12-06 21:43:10,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-12-06 21:43:10,193 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 193 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:10,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 935 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 327 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2021-12-06 21:43:10,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-06 21:43:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 90. [2021-12-06 21:43:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 74 states have internal predecessors, (92), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-06 21:43:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 125 transitions. [2021-12-06 21:43:10,212 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 125 transitions. Word has length 37 [2021-12-06 21:43:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:10,212 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 125 transitions. [2021-12-06 21:43:10,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 21:43:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 125 transitions. [2021-12-06 21:43:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 21:43:10,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:10,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:10,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 21:43:10,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:10,416 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:10,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1693334873, now seen corresponding path program 1 times [2021-12-06 21:43:10,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:10,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217427723] [2021-12-06 21:43:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:10,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 21:43:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:43:10,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217427723] [2021-12-06 21:43:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217427723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:10,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:10,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:43:10,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497332430] [2021-12-06 21:43:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:10,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:43:10,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:43:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:43:10,552 INFO L87 Difference]: Start difference. First operand 90 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:43:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:10,630 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2021-12-06 21:43:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:43:10,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-06 21:43:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:10,631 INFO L225 Difference]: With dead ends: 133 [2021-12-06 21:43:10,631 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 21:43:10,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:43:10,632 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:10,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 169 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:43:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 21:43:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-12-06 21:43:10,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.323943661971831) internal successors, (94), 76 states have internal predecessors, (94), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2021-12-06 21:43:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 127 transitions. [2021-12-06 21:43:10,643 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 127 transitions. Word has length 35 [2021-12-06 21:43:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:10,643 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 127 transitions. [2021-12-06 21:43:10,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:43:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 127 transitions. [2021-12-06 21:43:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 21:43:10,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:10,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:10,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:43:10,645 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:10,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1474480155, now seen corresponding path program 1 times [2021-12-06 21:43:10,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:10,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152942719] [2021-12-06 21:43:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:10,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 21:43:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:43:10,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152942719] [2021-12-06 21:43:10,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152942719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:10,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:10,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:43:10,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591913787] [2021-12-06 21:43:10,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:10,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:43:10,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:43:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:43:10,708 INFO L87 Difference]: Start difference. First operand 92 states and 127 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 21:43:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:10,730 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2021-12-06 21:43:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:43:10,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-12-06 21:43:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:10,732 INFO L225 Difference]: With dead ends: 99 [2021-12-06 21:43:10,732 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 21:43:10,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:43:10,733 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:10,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 21:43:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-12-06 21:43:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-06 21:43:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2021-12-06 21:43:10,741 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 35 [2021-12-06 21:43:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:10,741 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2021-12-06 21:43:10,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 21:43:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2021-12-06 21:43:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 21:43:10,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:10,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:10,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:43:10,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1846747895, now seen corresponding path program 1 times [2021-12-06 21:43:10,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:10,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31994965] [2021-12-06 21:43:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:10,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 21:43:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:43:10,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31994965] [2021-12-06 21:43:10,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31994965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:10,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:10,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:43:10,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000670682] [2021-12-06 21:43:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:10,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:43:10,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:43:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:43:10,795 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 21:43:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:10,839 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2021-12-06 21:43:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:43:10,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-12-06 21:43:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:10,840 INFO L225 Difference]: With dead ends: 130 [2021-12-06 21:43:10,840 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 21:43:10,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:43:10,841 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:10,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 21:43:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-06 21:43:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-06 21:43:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2021-12-06 21:43:10,847 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 36 [2021-12-06 21:43:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:10,847 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2021-12-06 21:43:10,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 21:43:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2021-12-06 21:43:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 21:43:10,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:10,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2021-12-06 21:43:10,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:43:10,849 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash -827934680, now seen corresponding path program 1 times [2021-12-06 21:43:10,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:10,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140298329] [2021-12-06 21:43:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:10,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 21:43:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 21:43:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:10,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:43:11,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:11,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140298329] [2021-12-06 21:43:11,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140298329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:11,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418736016] [2021-12-06 21:43:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:11,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:11,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:11,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:43:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:43:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:11,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-06 21:43:11,124 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:43:11,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-06 21:43:11,150 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-06 21:43:11,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-06 21:43:11,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-06 21:43:11,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 21:43:11,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 [2021-12-06 21:43:11,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:43:11,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-12-06 21:43:11,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 18 [2021-12-06 21:43:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:43:11,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:11,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:11,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 124 treesize of output 127 [2021-12-06 21:43:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 144 [2021-12-06 21:43:11,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 144 treesize of output 140 [2021-12-06 21:43:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 26 [2021-12-06 21:43:11,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 21:43:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:43:11,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418736016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:11,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:11,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2021-12-06 21:43:11,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092620165] [2021-12-06 21:43:11,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:11,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:43:11,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:43:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:43:11,531 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 21:43:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:11,909 INFO L93 Difference]: Finished difference Result 172 states and 253 transitions. [2021-12-06 21:43:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 21:43:11,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 46 [2021-12-06 21:43:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:11,917 INFO L225 Difference]: With dead ends: 172 [2021-12-06 21:43:11,917 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 21:43:11,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-12-06 21:43:11,918 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 123 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:11,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 545 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 450 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2021-12-06 21:43:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 21:43:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-12-06 21:43:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 69 states have internal predecessors, (88), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2021-12-06 21:43:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 124 transitions. [2021-12-06 21:43:11,936 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 124 transitions. Word has length 46 [2021-12-06 21:43:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 124 transitions. [2021-12-06 21:43:11,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 21:43:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 124 transitions. [2021-12-06 21:43:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:43:11,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:11,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1] [2021-12-06 21:43:11,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:43:12,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:43:12,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash 803799756, now seen corresponding path program 1 times [2021-12-06 21:43:12,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:12,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839803595] [2021-12-06 21:43:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:12,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:12,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:12,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:43:12,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839803595] [2021-12-06 21:43:12,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839803595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395445965] [2021-12-06 21:43:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:12,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:12,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:12,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:12,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:43:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:12,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 21:43:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:12,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:43:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:12,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:12,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:43:13,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:13,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:43:13,047 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 21:43:13,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 52 [2021-12-06 21:43:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:13,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 52 [2021-12-06 21:43:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:43:16,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:16,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 4 [2021-12-06 21:43:16,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 4 [2021-12-06 21:43:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:43:17,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 174 [2021-12-06 21:43:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:43:17,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:17,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 109 [2021-12-06 21:43:17,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:17,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 700 treesize of output 686 [2021-12-06 21:43:17,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:43:17,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 876 treesize of output 822 [2021-12-06 21:43:17,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 814 treesize of output 792 [2021-12-06 21:43:17,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:43:17,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:17,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 986 treesize of output 872 [2021-12-06 21:43:18,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:18,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:18,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:19,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:19,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 26 [2021-12-06 21:43:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:19,382 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-12-06 21:43:19,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 108 [2021-12-06 21:43:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:43:19,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395445965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:19,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:19,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2021-12-06 21:43:19,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236202093] [2021-12-06 21:43:19,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 21:43:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 21:43:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1559, Unknown=6, NotChecked=0, Total=1722 [2021-12-06 21:43:19,654 INFO L87 Difference]: Start difference. First operand 86 states and 124 transitions. Second operand has 42 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 41 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 21:43:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:23,867 INFO L93 Difference]: Finished difference Result 272 states and 405 transitions. [2021-12-06 21:43:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 21:43:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 41 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43 [2021-12-06 21:43:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:23,869 INFO L225 Difference]: With dead ends: 272 [2021-12-06 21:43:23,869 INFO L226 Difference]: Without dead ends: 199 [2021-12-06 21:43:23,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=481, Invalid=4066, Unknown=9, NotChecked=0, Total=4556 [2021-12-06 21:43:23,871 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 379 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:23,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 1431 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1404 Invalid, 0 Unknown, 377 Unchecked, 1.2s Time] [2021-12-06 21:43:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-06 21:43:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 110. [2021-12-06 21:43:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 89 states have internal predecessors, (107), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (30), 14 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-06 21:43:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 153 transitions. [2021-12-06 21:43:23,885 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 153 transitions. Word has length 43 [2021-12-06 21:43:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:23,885 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 153 transitions. [2021-12-06 21:43:23,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 41 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 21:43:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 153 transitions. [2021-12-06 21:43:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 21:43:23,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:23,886 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:23,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:43:24,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:24,087 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1251374562, now seen corresponding path program 1 times [2021-12-06 21:43:24,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:24,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929839493] [2021-12-06 21:43:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:24,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 21:43:24,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:24,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929839493] [2021-12-06 21:43:24,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929839493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:24,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:24,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:43:24,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518300398] [2021-12-06 21:43:24,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:24,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:43:24,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:24,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:43:24,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:43:24,186 INFO L87 Difference]: Start difference. First operand 110 states and 153 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 21:43:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:24,223 INFO L93 Difference]: Finished difference Result 134 states and 189 transitions. [2021-12-06 21:43:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:43:24,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-06 21:43:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:24,225 INFO L225 Difference]: With dead ends: 134 [2021-12-06 21:43:24,225 INFO L226 Difference]: Without dead ends: 132 [2021-12-06 21:43:24,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:43:24,226 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:24,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 345 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:43:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-06 21:43:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2021-12-06 21:43:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 91 states have internal predecessors, (109), 16 states have call successors, (16), 6 states have call predecessors, (16), 12 states have return successors, (39), 15 states have call predecessors, (39), 15 states have call successors, (39) [2021-12-06 21:43:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 164 transitions. [2021-12-06 21:43:24,239 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 164 transitions. Word has length 44 [2021-12-06 21:43:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:24,239 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 164 transitions. [2021-12-06 21:43:24,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 21:43:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 164 transitions. [2021-12-06 21:43:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:43:24,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:24,241 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1] [2021-12-06 21:43:24,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:43:24,241 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash -13848694, now seen corresponding path program 1 times [2021-12-06 21:43:24,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:24,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643301556] [2021-12-06 21:43:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:24,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 21:43:24,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643301556] [2021-12-06 21:43:24,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643301556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070935468] [2021-12-06 21:43:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:24,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:24,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:24,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:43:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 21:43:24,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:24,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:24,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:24,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:24,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:43:24,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 12 [2021-12-06 21:43:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:43:24,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:24,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 4 [2021-12-06 21:43:24,721 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 21:43:24,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-12-06 21:43:24,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 21 [2021-12-06 21:43:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 7 [2021-12-06 21:43:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 21:43:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070935468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:24,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-06 21:43:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012655644] [2021-12-06 21:43:24,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:24,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 21:43:24,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 21:43:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-12-06 21:43:24,772 INFO L87 Difference]: Start difference. First operand 113 states and 164 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:43:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:25,337 INFO L93 Difference]: Finished difference Result 224 states and 331 transitions. [2021-12-06 21:43:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 21:43:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2021-12-06 21:43:25,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:25,339 INFO L225 Difference]: With dead ends: 224 [2021-12-06 21:43:25,339 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 21:43:25,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=1167, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 21:43:25,340 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 293 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:25,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 774 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 404 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2021-12-06 21:43:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 21:43:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 143. [2021-12-06 21:43:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.2641509433962264) internal successors, (134), 113 states have internal predecessors, (134), 22 states have call successors, (22), 9 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 20 states have call successors, (49) [2021-12-06 21:43:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2021-12-06 21:43:25,355 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 43 [2021-12-06 21:43:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:25,355 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2021-12-06 21:43:25,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:43:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2021-12-06 21:43:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:43:25,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:25,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1] [2021-12-06 21:43:25,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:43:25,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 21:43:25,558 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1248112818, now seen corresponding path program 2 times [2021-12-06 21:43:25,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:25,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204801435] [2021-12-06 21:43:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:25,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:25,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:43:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:25,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 21:43:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 21:43:25,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204801435] [2021-12-06 21:43:25,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204801435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242123452] [2021-12-06 21:43:25,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:43:25,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:25,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:25,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:25,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:43:26,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:43:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:43:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 21:43:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-06 21:43:26,086 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 21:43:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 21:43:26,103 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:43:26,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-06 21:43:26,128 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-06 21:43:26,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 55 [2021-12-06 21:43:26,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-06 21:43:26,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 21:43:26,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 [2021-12-06 21:43:26,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 21:43:26,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:43:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-12-06 21:43:26,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 18 [2021-12-06 21:43:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:43:26,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:26,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:26,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 124 treesize of output 127 [2021-12-06 21:43:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 144 [2021-12-06 21:43:26,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 144 treesize of output 140 [2021-12-06 21:43:26,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 26 [2021-12-06 21:43:26,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 21:43:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:43:26,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242123452] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:26,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:26,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 30 [2021-12-06 21:43:26,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618484722] [2021-12-06 21:43:26,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:26,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 21:43:26,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 21:43:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-12-06 21:43:26,727 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 30 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:43:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:27,977 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2021-12-06 21:43:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 21:43:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2021-12-06 21:43:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:27,979 INFO L225 Difference]: With dead ends: 253 [2021-12-06 21:43:27,979 INFO L226 Difference]: Without dead ends: 204 [2021-12-06 21:43:27,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 21:43:27,980 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 214 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:27,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 941 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1204 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2021-12-06 21:43:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-06 21:43:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 171. [2021-12-06 21:43:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 126 states have (on average 1.253968253968254) internal successors, (158), 136 states have internal predecessors, (158), 27 states have call successors, (27), 12 states have call predecessors, (27), 17 states have return successors, (57), 22 states have call predecessors, (57), 25 states have call successors, (57) [2021-12-06 21:43:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 242 transitions. [2021-12-06 21:43:27,996 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 242 transitions. Word has length 49 [2021-12-06 21:43:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:27,997 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 242 transitions. [2021-12-06 21:43:27,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:43:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 242 transitions. [2021-12-06 21:43:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 21:43:27,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:27,998 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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] [2021-12-06 21:43:28,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:43:28,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 21:43:28,199 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1653640865, now seen corresponding path program 1 times [2021-12-06 21:43:28,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:28,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774982982] [2021-12-06 21:43:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:28,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 21:43:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 21:43:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 21:43:28,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:28,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774982982] [2021-12-06 21:43:28,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774982982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:28,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125417553] [2021-12-06 21:43:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:28,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:28,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:28,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:43:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 21:43:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:28,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-06 21:43:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:43:28,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 21:43:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:43:28,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:43:28,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-06 21:43:28,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,605 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:43:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2021-12-06 21:43:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,616 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:43:28,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2021-12-06 21:43:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:43:28,967 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 21:43:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 75 [2021-12-06 21:43:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 68 [2021-12-06 21:43:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:43:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125417553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:30,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:43:30,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 23] total 27 [2021-12-06 21:43:30,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995910302] [2021-12-06 21:43:30,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:30,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 21:43:30,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 21:43:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:43:30,060 INFO L87 Difference]: Start difference. First operand 171 states and 242 transitions. Second operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 21:43:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:30,767 INFO L93 Difference]: Finished difference Result 336 states and 469 transitions. [2021-12-06 21:43:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 21:43:30,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 54 [2021-12-06 21:43:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:30,769 INFO L225 Difference]: With dead ends: 336 [2021-12-06 21:43:30,769 INFO L226 Difference]: Without dead ends: 175 [2021-12-06 21:43:30,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 21:43:30,771 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 50 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:30,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 489 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 112 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2021-12-06 21:43:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-06 21:43:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2021-12-06 21:43:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 125 states have (on average 1.24) internal successors, (155), 130 states have internal predecessors, (155), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (43), 21 states have call predecessors, (43), 25 states have call successors, (43) [2021-12-06 21:43:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2021-12-06 21:43:30,786 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 54 [2021-12-06 21:43:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:30,786 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2021-12-06 21:43:30,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 7 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 21:43:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2021-12-06 21:43:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 21:43:30,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:30,787 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:30,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:43:30,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:43:30,988 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1865771786, now seen corresponding path program 1 times [2021-12-06 21:43:30,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427615513] [2021-12-06 21:43:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:30,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 21:43:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:43:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 21:43:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 21:43:31,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427615513] [2021-12-06 21:43:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427615513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102603039] [2021-12-06 21:43:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:31,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:31,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:31,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:43:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:43:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:43:31,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:43:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102603039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:43:31,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:43:31,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-06 21:43:31,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804890844] [2021-12-06 21:43:31,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:43:31,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:43:31,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:43:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:43:31,235 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 21:43:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:31,344 INFO L93 Difference]: Finished difference Result 214 states and 288 transitions. [2021-12-06 21:43:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:43:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 46 [2021-12-06 21:43:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:31,345 INFO L225 Difference]: With dead ends: 214 [2021-12-06 21:43:31,345 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 21:43:31,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:43:31,346 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:31,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 187 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:43:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 21:43:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2021-12-06 21:43:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 99 states have internal predecessors, (117), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (32), 18 states have call predecessors, (32), 18 states have call successors, (32) [2021-12-06 21:43:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 169 transitions. [2021-12-06 21:43:31,358 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 169 transitions. Word has length 46 [2021-12-06 21:43:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:31,358 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 169 transitions. [2021-12-06 21:43:31,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-06 21:43:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 169 transitions. [2021-12-06 21:43:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 21:43:31,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:31,360 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 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] [2021-12-06 21:43:31,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:43:31,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 21:43:31,561 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:31,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2104065155, now seen corresponding path program 1 times [2021-12-06 21:43:31,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:31,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123893996] [2021-12-06 21:43:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:31,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:43:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:43:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 21:43:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 21:43:31,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:31,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123893996] [2021-12-06 21:43:31,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123893996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:31,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201894496] [2021-12-06 21:43:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:31,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:31,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:31,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:31,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c388870b-cf90-4f86-bc45-c26f4a8c3251/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:43:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 21:43:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:32,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:43:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:32,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 30 [2021-12-06 21:43:32,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2021-12-06 21:43:32,153 INFO L354 Elim1Store]: treesize reduction 51, result has 20.3 percent of original size [2021-12-06 21:43:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 25 treesize of output 29 [2021-12-06 21:43:32,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:43:32,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 21:43:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 21:43:32,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:43:32,902 INFO L354 Elim1Store]: treesize reduction 18, result has 65.4 percent of original size [2021-12-06 21:43:32,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 174 treesize of output 152 [2021-12-06 21:43:32,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:32,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 594 treesize of output 591 [2021-12-06 21:43:32,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:32,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1888 treesize of output 1826 [2021-12-06 21:43:33,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:43:33,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2170 treesize of output 2258 [2021-12-06 21:43:33,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2165 treesize of output 2093 [2021-12-06 21:43:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2029 treesize of output 1981 [2021-12-06 21:43:34,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 4 [2021-12-06 21:43:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 4 [2021-12-06 21:43:36,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 744 treesize of output 692 [2021-12-06 21:43:57,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:57,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:43:58,003 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-06 21:44:11,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:44:11,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:44:13,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 4 [2021-12-06 21:52:47,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:52:47,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:52:47,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 27 [2021-12-06 21:52:48,234 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:48,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 184 [2021-12-06 21:52:48,427 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:48,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 180 [2021-12-06 21:52:48,653 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:52:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 25 treesize of output 19 [2021-12-06 21:52:49,118 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:49,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 184 [2021-12-06 21:52:49,320 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:49,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 108 [2021-12-06 21:52:49,529 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:52:49,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 37 treesize of output 23 [2021-12-06 21:52:53,268 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:52:53,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 41 treesize of output 27 [2021-12-06 21:52:53,699 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:52:53,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 37 treesize of output 23 [2021-12-06 21:52:53,772 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:52:53,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 25 treesize of output 19 [2021-12-06 21:52:54,044 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 108 [2021-12-06 21:52:54,287 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:54,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 184 [2021-12-06 21:52:54,454 INFO L354 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2021-12-06 21:52:54,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 180 [2021-12-06 21:52:54,918 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:52:54,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 41 treesize of output 27 [2021-12-06 21:52:57,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:52:57,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:52:57,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 23 [2021-12-06 21:52:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:52:57,188 INFO L354 Elim1Store]: treesize reduction 42, result has 44.7 percent of original size [2021-12-06 21:52:57,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 108 [2021-12-06 21:53:01,684 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-12-06 21:53:01,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 41 treesize of output 27 [2021-12-06 21:53:04,893 INFO L354 Elim1Store]: treesize reduction 269, result has 41.4 percent of original size [2021-12-06 21:53:04,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 1525 treesize of output 1642